# Configuration Vocabulary

The Configuration Vocabulary lists all available configurations provided by `application.yml`.

| Module                  | Provider      | Settings                                                                                                                                                                 | Value(s) and Explanation                                                                                                                                                                                                                                                                                                                                                                                                                                        | System Environment Variable¹                      | Default                                                                                      |
|-------------------------|---------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------|----------------------------------------------------------------------------------------------|
| core                    | default       | role                                                                                                                                                                     | Option values: `Mixed/Receiver/Aggregator`. **Receiver** mode OAP opens the service to the agents, then analyzes and aggregates the results, and forwards the results for distributed aggregation. Aggregator mode OAP receives data from Mixer and Receiver role OAP nodes, and performs 2nd level aggregation. **Mixer** means both Receiver and Aggregator.                                                                                                  | SW_CORE_ROLE                                      | Mixed                                                                                        |
| -                       | -             | restHost                                                                                                                                                                 | Binding IP of RESTful services. Services include GraphQL query and HTTP data report.                                                                                                                                                                                                                                                                                                                                                                            | SW_CORE_REST_HOST                                 | 0.0.0.0                                                                                      |
| -                       | -             | restPort                                                                                                                                                                 | Binding port of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_CORE_REST_PORT                                 | 12800                                                                                        |
| -                       | -             | restContextPath                                                                                                                                                          | Web context path of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CORE_REST_CONTEXT_PATH                         | /                                                                                            |
| -                       | -             | restMaxThreads                                                                                                                                                           | Maximum thread number of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_CORE_REST_REST_MAX_THREADS                     | 200                                                                                          |
| -                       | -             | restIdleTimeOut                                                                                                                                                          | Connector idle timeout of RESTful services (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                                   | SW_CORE_REST_IDLE_TIMEOUT                         | 30000                                                                                        |
| -                       | -             | restAcceptQueueSize                                                                                                                                                      | ServerSocketChannel Backlog of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                | SW_CORE_REST_QUEUE_SIZE                           | 0                                                                                            |
| -                       | -             | httpMaxRequestHeaderSize                                                                                                                                                 | Maximum request header size accepted.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CORE_HTTP_MAX_REQUEST_HEADER_SIZE              | 8192                                                                                         |
| -                       | -             | gRPCHost                                                                                                                                                                 | Binding IP of gRPC services, including gRPC data report and internal communication among OAP nodes.                                                                                                                                                                                                                                                                                                                                                             | SW_CORE_GRPC_HOST                                 | 0.0.0.0                                                                                      |
| -                       | -             | gRPCPort                                                                                                                                                                 | Binding port of gRPC services.                                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_CORE_GRPC_PORT                                 | 11800                                                                                        |
| -                       | -             | gRPCSslEnabled                                                                                                                                                           | Activates SSL for gRPC services.                                                                                                                                                                                                                                                                                                                                                                                                                                | SW_CORE_GRPC_SSL_ENABLED                          | false                                                                                        |
| -                       | -             | gRPCSslKeyPath                                                                                                                                                           | File path of gRPC SSL key.                                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_CORE_GRPC_SSL_KEY_PATH                         | -                                                                                            |
| -                       | -             | gRPCSslCertChainPath                                                                                                                                                     | File path of gRPC SSL cert chain.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_CORE_GRPC_SSL_CERT_CHAIN_PATH                  | -                                                                                            |
| -                       | -             | gRPCSslTrustedCAPath                                                                                                                                                     | File path of gRPC trusted CA.                                                                                                                                                                                                                                                                                                                                                                                                                                   | SW_CORE_GRPC_SSL_TRUSTED_CA_PATH                  | -                                                                                            |
| -                       | -             | downsampling                                                                                                                                                             | Activated level of down sampling aggregation.                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                   | Hour,Day                                                                                     |
| -                       | -             | persistentPeriod                                                                                                                                                         | Execution period of the persistent timer (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                          |                                                   | 25                                                                                           |
| -                       | -             | enableDataKeeperExecutor                                                                                                                                                 | Controller of TTL scheduler. Once disabled, TTL wouldn't work.                                                                                                                                                                                                                                                                                                                                                                                                  | SW_CORE_ENABLE_DATA_KEEPER_EXECUTOR               | true                                                                                         |
| -                       | -             | dataKeeperExecutePeriod                                                                                                                                                  | Execution period of TTL scheduler (in minutes). Execution doesn't mean deleting data. The storage provider (e.g. ElasticSearch storage) could override this.                                                                                                                                                                                                                                                                                                    | SW_CORE_DATA_KEEPER_EXECUTE_PERIOD                | 5                                                                                            |
| -                       | -             | recordDataTTL                                                                                                                                                            | The lifecycle of record data (in days). Record data includes traces, top N sample records, and logs. Minimum value is 2.                                                                                                                                                                                                                                                                                                                                        | SW_CORE_RECORD_DATA_TTL                           | 3                                                                                            |
| -                       | -             | metricsDataTTL                                                                                                                                                           | The lifecycle of metrics data (in days), including metadata. We recommend setting metricsDataTTL >= recordDataTTL. Minimum value is 2.                                                                                                                                                                                                                                                                                                                          | SW_CORE_METRICS_DATA_TTL                          | 7                                                                                            |
| -                       | -             | l1FlushPeriod                                                                                                                                                            | The period of L1 aggregation flush to L2 aggregation (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                         | SW_CORE_L1_AGGREGATION_FLUSH_PERIOD               | 500                                                                                          |
| -                       | -             | storageSessionTimeout                                                                                                                                                    | The threshold of session time (in milliseconds). Default value is 70000.                                                                                                                                                                                                                                                                                                                                                                                        | SW_CORE_STORAGE_SESSION_TIMEOUT                   | 70000                                                                                        |
| -                       | -             | persistentPeriod                                                                                                                                                         | The period of doing data persistence. Unit is second.Default value is 25s                                                                                                                                                                                                                                                                                                                                                                                       | SW_CORE_PERSISTENT_PERIOD                         | 25                                                                                           |
| -                       | -             | topNReportPeriod                                                                                                                                                         | The execution period (in minutes) of top N sampler, which saves sampled data into the storage.                                                                                                                                                                                                                                                                                                                                                                  | SW_CORE_TOPN_REPORT_PERIOD                        | 10                                                                                           |
| -                       | -             | activeExtraModelColumns                                                                                                                                                  | Appends entity names (e.g. service names) into metrics storage entities.                                                                                                                                                                                                                                                                                                                                                                                        | SW_CORE_ACTIVE_EXTRA_MODEL_COLUMNS                | false                                                                                        |
| -                       | -             | serviceNameMaxLength                                                                                                                                                     | Maximum length limit of service names.                                                                                                                                                                                                                                                                                                                                                                                                                          | SW_SERVICE_NAME_MAX_LENGTH                        | 70                                                                                           |
| -                       | -             | instanceNameMaxLength                                                                                                                                                    | Maximum length limit of service instance names. The maximum length of service + instance names should be less than 200.                                                                                                                                                                                                                                                                                                                                         | SW_INSTANCE_NAME_MAX_LENGTH                       | 70                                                                                           |
| -                       | -             | endpointNameMaxLength                                                                                                                                                    | Maximum length limit of endpoint names. The maximum length of service + endpoint names should be less than 240.                                                                                                                                                                                                                                                                                                                                                 | SW_ENDPOINT_NAME_MAX_LENGTH                       | 150                                                                                          |
| -                       | -             | searchableTracesTags                                                                                                                                                     | Defines a set of span tag keys which are searchable through GraphQL. Multiple values are separated by commas. The max length of key=value should be less than 256 or will be dropped.                                                                                                                                                                                                                                                                                                                                                  | SW_SEARCHABLE_TAG_KEYS                            | http.method,http.status_code,rpc.status_code,db.type,db.instance,mq.queue,mq.topic,mq.broker |
| -                       | -             | searchableLogsTags                                                                                                                                                       | Defines a set of log tag keys which are searchable through GraphQL. Multiple values are separated by commas. The max length of key=value should be less than 256 or will be dropped.                                                                                                                                                                                                                                                                                                                                                    | SW_SEARCHABLE_LOGS_TAG_KEYS                       | level                                                                                        |
| -                       | -             | searchableAlarmTags                                                                                                                                                      | Defines a set of alarm tag keys which are searchable through GraphQL. Multiple values are separated by commas. The max length of key=value should be less than 256 or will be dropped.                                                                                                                                                                                                                                                                                                                                                  | SW_SEARCHABLE_ALARM_TAG_KEYS                      | level                                                                                        |
| -                       | -             | autocompleteTagKeysQueryMaxSize                                                                                                                                          | The max size of tags keys for autocomplete select.                                                                                                                                                                                                                                                                                                                                                                                                              | SW_AUTOCOMPLETE_TAG_KEYS_QUERY_MAX_SIZE                      | 100                                                                                          |
| -                       | -             | autocompleteTagValuesQueryMaxSize                                                                                                                                        | The max size of tags values for autocomplete select.                                                                                                                                                                                                                                                                                                                                                                                                            | SW_AUTOCOMPLETE_TAG_VALUES_QUERY_MAX_SIZE                      | 100                                                                                          |
| -                       | -             | gRPCThreadPoolSize                                                                                                                                                       | Pool size of gRPC server.                                                                                                                                                                                                                                                                                                                                                                                                                                       | SW_CORE_GRPC_THREAD_POOL_SIZE                     | CPU core * 4                                                                                 |
| -                       | -             | gRPCThreadPoolQueueSize                                                                                                                                                  | Queue size of gRPC server.                                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_CORE_GRPC_POOL_QUEUE_SIZE                      | 10000                                                                                        |
| -                       | -             | maxConcurrentCallsPerConnection                                                                                                                                          | The maximum number of concurrent calls permitted for each incoming connection. Defaults to no limit.                                                                                                                                                                                                                                                                                                                                                            | SW_CORE_GRPC_MAX_CONCURRENT_CALL                  | -                                                                                            |
| -                       | -             | maxMessageSize                                                                                                                                                           | Sets the maximum message size allowed to be received on the server. Empty means 4 MiB.                                                                                                                                                                                                                                                                                                                                                                          | SW_CORE_GRPC_MAX_MESSAGE_SIZE                     | 4M(based on Netty)                                                                           |
| -                       | -             | remoteTimeout                                                                                                                                                            | Timeout for cluster internal communication (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                        | -                                                 | 20                                                                                           |
| -                       | -             | maxSizeOfNetworkAddressAlias                                                                                                                                             | The maximum size of network address detected in the system being monitored.                                                                                                                                                                                                                                                                                                                                                                                     | -                                                 | 1_000_000                                                                                    |
| -                       | -             | maxPageSizeOfQueryProfileSnapshot                                                                                                                                        | The maximum size for snapshot analysis in an OAP query.                                                                                                                                                                                                                                                                                                                                                                                                         | -                                                 | 500                                                                                          |
| -                       | -             | maxSizeOfAnalyzeProfileSnapshot                                                                                                                                          | The maximum number of snapshots analyzed by the OAP.                                                                                                                                                                                                                                                                                                                                                                                                            | -                                                 | 12000                                                                                        |
| -                       | -             | prepareThreads                                                                                                                                                           | The number of threads used to prepare metrics data to the storage.                                                                                                                                                                                                                                                                                                                                                                                              | SW_CORE_PREPARE_THREADS                           | 2                                                                                            |
| -                       | -             | enableEndpointNameGroupingByOpenapi                                                                                                                                      | Automatically groups endpoints by the given OpenAPI definitions.                                                                                                                                                                                                                                                                                                                                                                                                | SW_CORE_ENABLE_ENDPOINT_NAME_GROUPING_BY_OPENAPI  | true                                                                                         |
| -                       | -             | maxDurationOfQueryEBPFProfilingData                                                                                                                                      | The maximum duration(in second) of query the eBPF profiling data from database.                                                                                                                                                                                                                                                                                                                                                                                 | -                                                 | 30                                                                                           |
| -                       | -             | maxThreadCountOfQueryEBPFProfilingData                                                                                                                                   | The maximum thread count of query the eBPF profiling data from database.                                                                                                                                                                                                                                                                                                                                                                                        | -                                                 | System CPU core size                                                                         |
| cluster                 | standalone    | -                                                                                                                                                                        | Standalone is not suitable for running on a single node running. No configuration available.                                                                                                                                                                                                                                                                                                                                                                    | -                                                 | -                                                                                            |
| -                       | zookeeper     | namespace                                                                                                                                                                | The namespace, represented by root path, isolates the configurations in Zookeeper.                                                                                                                                                                                                                                                                                                                                                                              | SW_NAMESPACE                                      | `/`, root path                                                                               |
| -                       | -             | hostPort                                                                                                                                                                 | Hosts and ports of Zookeeper Cluster.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CLUSTER_ZK_HOST_PORT                           | localhost:2181                                                                               |
| -                       | -             | baseSleepTimeMs                                                                                                                                                          | The period of Zookeeper client between two retries (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                           | SW_CLUSTER_ZK_SLEEP_TIME                          | 1000                                                                                         |
| -                       | -             | maxRetries                                                                                                                                                               | The maximum retry time.                                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_CLUSTER_ZK_MAX_RETRIES                         | 3                                                                                            |
| -                       | -             | enableACL                                                                                                                                                                | Opens ACL using `schema` and `expression`.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_ZK_ENABLE_ACL                                  | false                                                                                        |
| -                       | -             | schema                                                                                                                                                                   | Schema for the authorization.                                                                                                                                                                                                                                                                                                                                                                                                                                   | SW_ZK_SCHEMA                                      | digest                                                                                       |
| -                       | -             | expression                                                                                                                                                               | Expression for the authorization.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_ZK_EXPRESSION                                  | skywalking:skywalking                                                                        |
| -                       | -             | internalComHost                                                                                                                                                          | The hostname registered in Zookeeper for the internal communication of OAP cluster.                                                                                                                                                                                                                                                                                                                                                                             | SW_CLUSTER_INTERNAL_COM_HOST                      | -                                                                                            |
| -                       | -             | internalComPort                                                                                                                                                          | The port registered in Zookeeper for the internal communication of OAP cluster.                                                                                                                                                                                                                                                                                                                                                                                 | SW_CLUSTER_INTERNAL_COM_PORT                      | -1                                                                                           |
| -                       | kubernetes    | namespace                                                                                                                                                                | Namespace deployed by SkyWalking in k8s.                                                                                                                                                                                                                                                                                                                                                                                                                        | SW_CLUSTER_K8S_NAMESPACE                          | default                                                                                      |
| -                       | -             | labelSelector                                                                                                                                                            | Labels used for filtering OAP deployment in k8s.                                                                                                                                                                                                                                                                                                                                                                                                                | SW_CLUSTER_K8S_LABEL                              | app=collector,release=skywalking                                                             |
| -                       | -             | uidEnvName                                                                                                                                                               | Environment variable name for reading uid.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_CLUSTER_K8S_UID                                | SKYWALKING_COLLECTOR_UID                                                                     |
| -                       | consul        | serviceName                                                                                                                                                              | Service name for SkyWalking cluster.                                                                                                                                                                                                                                                                                                                                                                                                                            | SW_SERVICE_NAME                                   | SkyWalking_OAP_Cluster                                                                       |
| -                       | -             | hostPort                                                                                                                                                                 | Hosts and ports for Consul cluster.                                                                                                                                                                                                                                                                                                                                                                                                                             | SW_CLUSTER_CONSUL_HOST_PORT                       | localhost:8500                                                                               |
| -                       | -             | aclToken                                                                                                                                                                 | ACL Token of Consul. Empty string means `without ALC token`.                                                                                                                                                                                                                                                                                                                                                                                                    | SW_CLUSTER_CONSUL_ACLTOKEN                        | -                                                                                            |
| -                       | -             | internalComHost                                                                                                                                                          | The hostname registered in Consul for internal communications of the OAP cluster.                                                                                                                                                                                                                                                                                                                                                                               | SW_CLUSTER_INTERNAL_COM_HOST                      | -                                                                                            |
| -                       | -             | internalComPort                                                                                                                                                          | The port registered in Consul for internal communications of the OAP cluster.                                                                                                                                                                                                                                                                                                                                                                                   | SW_CLUSTER_INTERNAL_COM_PORT                      | -1                                                                                           |
| -                       | etcd          | serviceName                                                                                                                                                              | Service name for SkyWalking cluster.                                                                                                                                                                                                                                                                                                                                                                                                                            | SW_CLUSTER_ETCD_SERVICE_NAME                      | SkyWalking_OAP_Cluster                                                                       |
| -                       | -             | endpoints                                                                                                                                                                | Hosts and ports for etcd cluster.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_CLUSTER_ETCD_ENDPOINTS                         | localhost:2379                                                                               |
| -                       | -             | namespace                                                                                                                                                                | Namespace for SkyWalking cluster.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_CLUSTER_ETCD_NAMESPACE                         | /skywalking                                                                                  |
| -                       | -             | authentication                                                                                                                                                           | Indicates whether there is authentication.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_CLUSTER_ETCD_AUTHENTICATION                    | false                                                                                        |
| -                       | -             | user                                                                                                                                                                     | Etcd auth username.                                                                                                                                                                                                                                                                                                                                                                                                                                             | SW_CLUSTER_ETCD_USER                              |                                                                                              |
| -                       | -             | password                                                                                                                                                                 | Etcd auth password.                                                                                                                                                                                                                                                                                                                                                                                                                                             | SW_CLUSTER_ETCD_PASSWORD                          |                                                                                              |
| -                       | -             | internalComHost                                                                                                                                                          | The hostname registered in etcd for internal communications of the OAP cluster.                                                                                                                                                                                                                                                                                                                                                                                 | SW_CLUSTER_INTERNAL_COM_HOST                      | -                                                                                            |
| -                       | -             | internalComPort                                                                                                                                                          | The port registered in etcd for internal communications of the OAP cluster.                                                                                                                                                                                                                                                                                                                                                                                     | SW_CLUSTER_INTERNAL_COM_PORT                      | -1                                                                                           |
| -                       | Nacos         | serviceName                                                                                                                                                              | Service name for SkyWalking cluster.                                                                                                                                                                                                                                                                                                                                                                                                                            | SW_SERVICE_NAME                                   | SkyWalking_OAP_Cluster                                                                       |
| -                       | -             | hostPort                                                                                                                                                                 | Hosts and ports for Nacos cluster.                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_CLUSTER_NACOS_HOST_PORT                        | localhost:8848                                                                               |
| -                       | -             | namespace                                                                                                                                                                | Namespace used by SkyWalking node coordination.                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_CLUSTER_NACOS_NAMESPACE                        | public                                                                                       |
| -                       | -             | internalComHost                                                                                                                                                          | The hostname registered in Nacos for internal communications of the OAP cluster.                                                                                                                                                                                                                                                                                                                                                                                | SW_CLUSTER_INTERNAL_COM_HOST                      | -                                                                                            |
| -                       | -             | internalComPort                                                                                                                                                          | The port registered in Nacos for internal communications of the OAP cluster.                                                                                                                                                                                                                                                                                                                                                                                    | SW_CLUSTER_INTERNAL_COM_PORT                      | -1                                                                                           |
| -                       | -             | username                                                                                                                                                                 | Nacos Auth username.                                                                                                                                                                                                                                                                                                                                                                                                                                            | SW_CLUSTER_NACOS_USERNAME                         | -                                                                                            |
| -                       | -             | password                                                                                                                                                                 | Nacos Auth password.                                                                                                                                                                                                                                                                                                                                                                                                                                            | SW_CLUSTER_NACOS_PASSWORD                         | -                                                                                            |
| -                       | -             | accessKey                                                                                                                                                                | Nacos Auth accessKey.                                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CLUSTER_NACOS_ACCESSKEY                        | -                                                                                            |
| -                       | -             | secretKey                                                                                                                                                                | Nacos Auth secretKey.                                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CLUSTER_NACOS_SECRETKEY                        | -                                                                                            |
| storage                 | elasticsearch | -                                                                                                                                                                        | ElasticSearch (and OpenSearch) storage implementation.                                                                                                                                                                                                                                                                                                                                                                                                          | -                                                 | -                                                                                            |
| -                       | -             | namespace                                                                                                                                                                | Prefix of indexes created and used by SkyWalking.                                                                                                                                                                                                                                                                                                                                                                                                               | SW_NAMESPACE                                      | -                                                                                            |
| -                       | -             | clusterNodes                                                                                                                                                             | ElasticSearch cluster nodes for client connection.                                                                                                                                                                                                                                                                                                                                                                                                              | SW_STORAGE_ES_CLUSTER_NODES                       | localhost                                                                                    |
| -                       | -             | protocol                                                                                                                                                                 | HTTP or HTTPs.                                                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_STORAGE_ES_HTTP_PROTOCOL                       | HTTP                                                                                         |
| -                       | -             | connectTimeout                                                                                                                                                           | Connect timeout of ElasticSearch client (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                                      | SW_STORAGE_ES_CONNECT_TIMEOUT                     | 3000                                                                                         |
| -                       | -             | socketTimeout                                                                                                                                                            | Socket timeout of ElasticSearch client (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                                       | SW_STORAGE_ES_SOCKET_TIMEOUT                      | 30000                                                                                        |
| -                       | -             | responseTimeout                                                                                                                                                          | Response timeout of ElasticSearch client (in milliseconds), `0` disables the timeout.                                                                                                                                                                                                                                                                                                                                                                           | SW_STORAGE_ES_RESPONSE_TIMEOUT                    | 1500                                                                                         |
| -                       | -             | numHttpClientThread                                                                                                                                                      | The number of threads for the underlying HTTP client to perform socket I/O. If the value is <= 0, the number of available processors will be used.                                                                                                                                                                                                                                                                                                              | SW_STORAGE_ES_NUM_HTTP_CLIENT_THREAD              | 0                                                                                            |
| -                       | -             | user                                                                                                                                                                     | Username of ElasticSearch cluster.                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_ES_USER                                        | -                                                                                            |
| -                       | -             | password                                                                                                                                                                 | Password of ElasticSearch cluster.                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_ES_PASSWORD                                    | -                                                                                            |
| -                       | -             | trustStorePath                                                                                                                                                           | Trust JKS file path. Only works when username and password are enabled.                                                                                                                                                                                                                                                                                                                                                                                         | SW_STORAGE_ES_SSL_JKS_PATH                        | -                                                                                            |
| -                       | -             | trustStorePass                                                                                                                                                           | Trust JKS file password. Only works when username and password are enabled.                                                                                                                                                                                                                                                                                                                                                                                     | SW_STORAGE_ES_SSL_JKS_PASS                        | -                                                                                            |
| -                       | -             | secretsManagementFile                                                                                                                                                    | Secrets management file in the properties format, including username and password, which are managed by a 3rd party tool. Capable of being updated them at runtime.                                                                                                                                                                                                                                                                                             | SW_ES_SECRETS_MANAGEMENT_FILE                     | -                                                                                            |
| -                       | -             | dayStep                                                                                                                                                                  | Represents the number of days in the one-minute/hour/day index.                                                                                                                                                                                                                                                                                                                                                                                                 | SW_STORAGE_DAY_STEP                               | 1                                                                                            |
| -                       | -             | indexShardsNumber                                                                                                                                                        | Shard number of new indexes.                                                                                                                                                                                                                                                                                                                                                                                                                                    | SW_STORAGE_ES_INDEX_SHARDS_NUMBER                 | 1                                                                                            |
| -                       | -             | indexReplicasNumber                                                                                                                                                      | Replicas number of new indexes.                                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_STORAGE_ES_INDEX_REPLICAS_NUMBER               | 0                                                                                            |
| -                       | -             | specificIndexSettings                                                                                                                                                    |  Specify the settings for each index individually. If configured, this setting has the highest priority and overrides the generic settings.                                                                                                                                                                                                                                                                                                                   | SW_STORAGE_ES_SPECIFIC_INDEX_SETTINGS             | -                                                                                            |
| -                       | -             | superDatasetDayStep                                                                                                                                                      | Represents the number of days in the super size dataset record index. Default value is the same as dayStep when the value is less than 0.                                                                                                                                                                                                                                                                                                                       | SW_STORAGE_ES_SUPER_DATASET_DAY_STEP              | -1                                                                                           |
| -                       | -             | superDatasetIndexShardsFactor                                                                                                                                            | Super dataset is defined in the code (e.g. trace segments). This factor provides more shards for the super dataset: shards number = indexShardsNumber * superDatasetIndexShardsFactor. This factor also affects Zipkin and Jaeger traces.                                                                                                                                                                                                                       | SW_STORAGE_ES_SUPER_DATASET_INDEX_SHARDS_FACTOR   | 5                                                                                            |
| -                       | -             | superDatasetIndexReplicasNumber                                                                                                                                          | Represents the replicas number in the super size dataset record index.                                                                                                                                                                                                                                                                                                                                                                                          | SW_STORAGE_ES_SUPER_DATASET_INDEX_REPLICAS_NUMBER | 0                                                                                            |
| -                       | -             | indexTemplateOrder                                                                                                                                                       | The order of index template.                                                                                                                                                                                                                                                                                                                                                                                                                                    | SW_STORAGE_ES_INDEX_TEMPLATE_ORDER                | 0                                                                                            |
| -                       | -             | bulkActions                                                                                                                                                              | Async bulk size of the record data batch execution.                                                                                                                                                                                                                                                                                                                                                                                                             | SW_STORAGE_ES_BULK_ACTIONS                        | 5000                                                                                         |
| -                       | -              | batchOfBytes                                                                                                                                                             | A threshold to control the max body size of ElasticSearch Bulk flush.                                                                                                                                                                                                                                                                                                                           | SW_STORAGE_ES_BATCH_OF_BYTES                      | 10485760  (10m)                                                                                       |
| -                       | -             | flushInterval                                                                                                                                                            | Period of flush (in seconds). Does not matter whether `bulkActions` is reached or not.                                                                                                                                                                                                                                                                                                               | SW_STORAGE_ES_FLUSH_INTERVAL                      | 5                                                                |
| -                       | -             | concurrentRequests                                                                                                                                                       | The number of concurrent requests allowed to be executed.                                                                                                                                                                                                                                                                                                                                                                                                       | SW_STORAGE_ES_CONCURRENT_REQUESTS                 | 2                                                                                            |
| -                       | -             | resultWindowMaxSize                                                                                                                                                      | The maximum size of dataset when the OAP loads cache, such as network aliases.                                                                                                                                                                                                                                                                                                                                                                                  | SW_STORAGE_ES_QUERY_MAX_WINDOW_SIZE               | 10000                                                                                        |
| -                       | -             | metadataQueryMaxSize                                                                                                                                                     | The maximum size of metadata per query.                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_STORAGE_ES_QUERY_MAX_SIZE                      | 10000                                                                                        |
| -                       | -             | scrollingBatchSize                                                                                                                                                       | The batch size of metadata per iteration when `metadataQueryMaxSize` or `resultWindowMaxSize` is too large to be retrieved in a single query.                                                                                                                                                                                                                                                                                                                   | SW_STORAGE_ES_SCROLLING_BATCH_SIZE                | 5000                                                                                         |
| -                       | -             | segmentQueryMaxSize                                                                                                                                                      | The maximum size of trace segments per query.                                                                                                                                                                                                                                                                                                                                                                                                                   | SW_STORAGE_ES_QUERY_SEGMENT_SIZE                  | 200                                                                                          |
| -                       | -             | profileTaskQueryMaxSize                                                                                                                                                  | The maximum size of profile task per query.                                                                                                                                                                                                                                                                                                                                                                                                                     | SW_STORAGE_ES_QUERY_PROFILE_TASK_SIZE             | 200                                                                                          |
| -                       | -             | profileDataQueryScrollBatchSize                                                                                                                                          | The batch size of query profiling data.                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_STORAGE_ES_QUERY_PROFILE_DATA_BATCH_SIZE       | 100                                                                                          |
| -                       | -             | advanced                                                                                                                                                                 | All settings of ElasticSearch index creation. The value should be in JSON format.                                                                                                                                                                                                                                                                                                                                                                               | SW_STORAGE_ES_ADVANCED                            | -                                                                                            |
| -                       | -             | logicSharding                                                                                                                                          | Shard metrics and records indices into multi-physical indices, one index template per metric/meter aggregation function or record.                                                                                                                                                                                        | SW_STORAGE_ES_LOGIC_SHARDING       | false                                                                                        |
| -                       | h2            | -                                                                                                                                                                        | H2 storage is designed for demonstration and running in short term (i.e. 1-2 hours) only.                                                                                                                                                                                                                                                                                                                                                                       | -                                                 | -                                                                                            |
| -                       | -             | url                                                                                                                                                                      | H2 connection URL. Defaults to H2 memory mode.                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_STORAGE_H2_URL                                 | jdbc:h2:mem:skywalking-oap-db                                                                |
| -                       | -             | user                                                                                                                                                                     | Username of H2 database.                                                                                                                                                                                                                                                                                                                                                                                                                                        | SW_STORAGE_H2_USER                                | sa                                                                                           |
| -                       | -             | password                                                                                                                                                                 | Password of H2 database.                                                                                                                                                                                                                                                                                                                                                                                                                                        | -                                                 | -                                                                                            |
| -                       | -             | metadataQueryMaxSize                                                                                                                                                     | The maximum size of metadata per query.                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_STORAGE_H2_QUERY_MAX_SIZE                      | 5000                                                                                         |
| -                       | -             | maxSizeOfBatchSql                                                                                                                                                        | The maximum size of batch size of SQL execution                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_STORAGE_MAX_SIZE_OF_BATCH_SQL                  | 100                                                                                          |
| -                       | -             | asyncBatchPersistentPoolSize                                                                                                                                             | async flush data into database thread size                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_STORAGE_ASYNC_BATCH_PERSISTENT_POOL_SIZE       | 1                                                                                            |
| -                       | mysql         | -                                                                                                                                                                        | MySQL Storage. The MySQL JDBC Driver is not in the dist. Please copy it into the oap-lib folder manually.                                                                                                                                                                                                                                                                                                                                                       | -                                                 | -                                                                                            |
| -                       | -             | properties                                                                                                                                                               | Hikari connection pool configurations.                                                                                                                                                                                                                                                                                                                                                                                                                          | -                                                 | Listed in the `application.yaml`.                                                            |
| -                       | -             | metadataQueryMaxSize                                                                                                                                                     | The maximum size of metadata per query.                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_STORAGE_MYSQL_QUERY_MAX_SIZE                   | 5000                                                                                         |
| -                       | -             | maxSizeOfBatchSql                                                                                                                                                        | The maximum size of batch size of SQL execution                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_STORAGE_MAX_SIZE_OF_BATCH_SQL                  | 2000                                                                                         |
| -                       | -             | asyncBatchPersistentPoolSize                                                                                                                                             | async flush data into database thread size                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_STORAGE_ASYNC_BATCH_PERSISTENT_POOL_SIZE       | 4                                                                                            |
| -                       | mysql-sharding | -                                                                                                                                                                        | Sharding-Proxy for MySQL properties. The MySQL JDBC Driver is not in the dist. Please copy it into the oap-lib folder manually.                                                                                                                                                                                                                                                                                                                                                       | -                                                 | -                                                                                            |
| -                       | -             | properties                                                                                                                                                               | Hikari connection pool configurations.                                                                                                                                                                                                                                                                                                                                                                                                                          | -                                                 | Listed in the `application.yaml`.                                                            |
| -                       | -             | metadataQueryMaxSize                                                                                                                                                     | The maximum size of metadata per query.                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_STORAGE_MYSQL_QUERY_MAX_SIZE                   | 5000                                                                                         |
| -                       | -             | maxSizeOfBatchSql                                                                                                                                                        | The maximum size of batch size of SQL execution                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_STORAGE_MAX_SIZE_OF_BATCH_SQL                  | 2000                                                                                         |
| -                       | -             | asyncBatchPersistentPoolSize                                                                                                                                             | async flush data into database thread size                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_STORAGE_ASYNC_BATCH_PERSISTENT_POOL_SIZE       | 4                                                                                            |
| -                       | -             | dataSources                                                                                                                                             |  The dataSources are configured in ShardingSphere-Proxy config-sharding.yaml.The dataSource name should include the prefix "ds_" and separated by "," and start from ds_0                                                                                                                                                                                                                                                                                                                                                                                                                     | SW_JDBC_SHARDING_DATA_SOURCES       | ds_0,ds_1                                                                                    |
| -                       | postgresql    | -                                                                                                                                                                        | PostgreSQL storage.                                                                                                                                                                                                                                                                                                                                                                                                                                             | -                                                 | -                                                                                            |
| -                       | -             | properties                                                                                                                                                               | Hikari connection pool configurations.                                                                                                                                                                                                                                                                                                                                                                                                                          | -                                                 | Listed in the `application.yaml`.                                                            |
| -                       | -             | metadataQueryMaxSize                                                                                                                                                     | The maximum size of metadata per query.                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_STORAGE_MYSQL_QUERY_MAX_SIZE                   | 5000                                                                                         |
| -                       | -             | maxSizeOfBatchSql                                                                                                                                                        | The maximum size of batch size of SQL execution                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_STORAGE_MAX_SIZE_OF_BATCH_SQL                  | 2000                                                                                         |
| -                       | -             | asyncBatchPersistentPoolSize                                                                                                                                             | async flush data into database thread size                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_STORAGE_ASYNC_BATCH_PERSISTENT_POOL_SIZE       | 4                                                                                            |
| -                       | banyandb      | -                                                                                                                                                                        | BanyanDB storage.                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 | -                                                                                            |
| -                       | -             | host                                                                                                                                                                     | Host of the BanyanDB.                                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_STORAGE_BANYANDB_HOST                          | 127.0.0.1                                                                                    |
| -                       | -             | port                                                                                                                                                                     | Port of the BanyanDB.                                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_STORAGE_BANYANDB_PORT                          | 17912                                                                                        |
| -                       | -             | maxBulkSize                                                                                                                                                              | The maximum size of write entities in a single batch write call.                                                                                                                                                                                                                                                                                                                                                                                                | SW_STORAGE_BANYANDB_MAX_BULK_SIZE                 | 5000                                                                                         |
| -                       | -             | flushInterval                                                                                                                                                            | Period of flush interval. In the timeunit of seconds.                                                                                                                                                                                                                                                                                                                                                                                                           | SW_STORAGE_BANYANDB_FLUSH_INTERVAL                | 15                                                                                           |
| -                       | -             | metricsShardsNumber                                                                                                                                                      | Shards Number for measure/metrics.                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_STORAGE_BANYANDB_METRICS_SHARDS_NUMBER         | 1                                                                                            |
| -                       | -             | recordShardsNumber                                                                                                                                                       | Shards Number for a normal record.                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_STORAGE_BANYANDB_RECORD_SHARDS_NUMBER          | 1                                                                                            |
| -                       | -             | superDatasetShardsFactor                                                                                                                                                 | Shards Factor for a super dataset record, i.e. Shard number of a super dataset is recordShardsNumber*superDatasetShardsFactor.                                                                                                                                                                                                                                                                                                                                  | SW_STORAGE_BANYANDB_SUPERDATASET_SHARDS_FACTOR    | 2                                                                                            |
| -                       | -             | concurrentWriteThreads                                                                                                                                                   | Concurrent consumer threads for batch writing.                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_STORAGE_BANYANDB_CONCURRENT_WRITE_THREADS      | 15                                                                                           |
| -                       | -             | profileTaskQueryMaxSize                                                                                                                                                  | Max size of ProfileTask to be fetched.                                                                                                                                                                                                                                                                                                                                                                                                                          | SW_STORAGE_BANYANDB_PROFILE_TASK_QUERY_MAX_SIZE   | 200                                                                                          |
| agent-analyzer          | default       | Agent Analyzer.                                                                                                                                                          | SW_AGENT_ANALYZER                                                                                                                                                                                                                                                                                                                                                                                                                                               | default                                           |                                                                                              |
| -                       | -             | traceSamplingPolicySettingsFile                                                                                                                                          | The sampling policy including `sampling rate` and `the threshold of trace segment latency` can be configured by the `traceSamplingPolicySettingsFile` file.                                                                                                                                                                                                                                                                                                     | SW_TRACE_SAMPLING_POLICY_SETTINGS_FILE            | `trace-sampling-policy-settings.yml`                                                         |
| -                       | -             | slowDBAccessThreshold                                                                                                                                                    | The slow database access threshold (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                                           | SW_SLOW_DB_THRESHOLD                              | default:200,mongodb:100                                                                      |
| -                       | -             | forceSampleErrorSegment                                                                                                                                                  | When sampling mechanism is activated, this config samples the error status segment and ignores the sampling rate.                                                                                                                                                                                                                                                                                                                                               | SW_FORCE_SAMPLE_ERROR_SEGMENT                     | true                                                                                         |
| -                       | -             | segmentStatusAnalysisStrategy                                                                                                                                            | Determines the final segment status from span status. Available values are `FROM_SPAN_STATUS` , `FROM_ENTRY_SPAN`, and `FROM_FIRST_SPAN`. `FROM_SPAN_STATUS` indicates that the segment status would be error if any span has an error status. `FROM_ENTRY_SPAN` means that the segment status would only be determined by the status of entry spans. `FROM_FIRST_SPAN` means that the segment status would only be determined by the status of the first span. | SW_SEGMENT_STATUS_ANALYSIS_STRATEGY               | FROM_SPAN_STATUS                                                                             |
| -                       | -             | noUpstreamRealAddressAgents                                                                                                                                              | Exit spans with the component in the list would not generate client-side instance relation metrics, since some tracing plugins (e.g. Nginx-LUA and Envoy) can't collect the real peer IP address.                                                                                                                                                                                                                                                               | SW_NO_UPSTREAM_REAL_ADDRESS                       | 6000,9000                                                                                    |
| -                       | -             | meterAnalyzerActiveFiles                                                                                                                                                 | Indicates which files could be instrumented and analyzed. Multiple files are split by ",".                                                                                                                                                                                                                                                                                                                                                                      | SW_METER_ANALYZER_ACTIVE_FILES                    ||     |
| -                       | -             | slowCacheWriteThreshold                                                                                                                                                  | The threshold of slow command which is used for writing operation (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                       | SW_SLOW_CACHE_WRITE_THRESHOLD                     | `default:20,redis:10`                                                                        |
| -                       | -             | slowCacheReadThreshold                                                                                                                                                   | The threshold of slow command which is used for reading (getting) operation (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                             | SW_SLOW_CACHE_READ_THRESHOLD                      | `default:20,redis:10`                                                                        |
| receiver-sharing-server | default       | Sharing server provides new gRPC and restful servers for data collection. Ana designates that servers in the core module are to be used for internal communication only. | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| -                       | -             | restHost                                                                                                                                                                 | Binding IP of RESTful services. Services include GraphQL query and HTTP data report.                                                                                                                                                                                                                                                                                                                                                                            | SW_RECEIVER_SHARING_REST_HOST                     | -                                                                                            |
| -                       | -             | restPort                                                                                                                                                                 | Binding port of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_RECEIVER_SHARING_REST_PORT                     | -                                                                                            |
| -                       | -             | restContextPath                                                                                                                                                          | Web context path of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_RECEIVER_SHARING_REST_CONTEXT_PATH             | -                                                                                            |
| -                       | -             | restMaxThreads                                                                                                                                                           | Maximum thread number of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_RECEIVER_SHARING_REST_MAX_THREADS              | 200                                                                                          |
| -                       | -             | restIdleTimeOut                                                                                                                                                          | Connector idle timeout of RESTful services (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                                   | SW_RECEIVER_SHARING_REST_IDLE_TIMEOUT             | 30000                                                                                        |
| -                       | -             | restAcceptQueueSize                                                                                                                                                      | ServerSocketChannel backlog of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                | SW_RECEIVER_SHARING_REST_QUEUE_SIZE               | 0                                                                                            |
| -                       | -             | httpMaxRequestHeaderSize                                                                                                                                                 | Maximum request header size accepted.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_RECEIVER_SHARING_HTTP_MAX_REQUEST_HEADER_SIZE  | 8192                                                                                         |
| -                       | -             | gRPCHost                                                                                                                                                                 | Binding IP of gRPC services. Services include gRPC data report and internal communication among OAP nodes.                                                                                                                                                                                                                                                                                                                                                      | SW_RECEIVER_GRPC_HOST                             | 0.0.0.0. Not Activated                                                                       |
| -                       | -             | gRPCPort                                                                                                                                                                 | Binding port of gRPC services.                                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_RECEIVER_GRPC_PORT                             | Not Activated                                                                                |
| -                       | -             | gRPCThreadPoolSize                                                                                                                                                       | Pool size of gRPC server.                                                                                                                                                                                                                                                                                                                                                                                                                                       | SW_RECEIVER_GRPC_THREAD_POOL_SIZE                 | CPU core * 4                                                                                 |
| -                       | -             | gRPCThreadPoolQueueSize                                                                                                                                                  | Queue size of gRPC server.                                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_RECEIVER_GRPC_POOL_QUEUE_SIZE                  | 10000                                                                                        |
| -                       | -             | gRPCSslEnabled                                                                                                                                                           | Activates SSL for gRPC services.                                                                                                                                                                                                                                                                                                                                                                                                                                | SW_RECEIVER_GRPC_SSL_ENABLED                      | false                                                                                        |
| -                       | -             | gRPCSslKeyPath                                                                                                                                                           | File path of gRPC SSL key.                                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_RECEIVER_GRPC_SSL_KEY_PATH                     | -                                                                                            |
| -                       | -             | gRPCSslCertChainPath                                                                                                                                                     | File path of gRPC SSL cert chain.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_RECEIVER_GRPC_SSL_CERT_CHAIN_PATH              | -                                                                                            |
| -                       | -             | maxConcurrentCallsPerConnection                                                                                                                                          | The maximum number of concurrent calls permitted for each incoming connection. Defaults to no limit.                                                                                                                                                                                                                                                                                                                                                            | SW_RECEIVER_GRPC_MAX_CONCURRENT_CALL              | -                                                                                            |
| -                       | -             | authentication                                                                                                                                                           | The token text for authentication. Works for gRPC connection only. Once this is set, the client is required to use the same token.                                                                                                                                                                                                                                                                                                                              | SW_AUTHENTICATION                                 | -                                                                                            |
| log-analyzer            | default       | Log Analyzer.                                                                                                                                                            | SW_LOG_ANALYZER                                                                                                                                                                                                                                                                                                                                                                                                                                                 | default                                           |                                                                                              |
| -                       | -             | lalFiles                                                                                                                                                                 | The LAL configuration file names (without file extension) to be activated. Read [LAL](../../concepts-and-designs/lal.md) for more details.                                                                                                                                                                                                                                                                                                                      | SW_LOG_LAL_FILES                                  | default                                                                                      |
| -                       | -             | malFiles                                                                                                                                                                 | The MAL configuration file names (without file extension) to be activated. Read [LAL](../../concepts-and-designs/lal.md) for more details.                                                                                                                                                                                                                                                                                                                      | SW_LOG_MAL_FILES                                  | ""                                                                                           |
| event-analyzer          | default       | Event Analyzer.                                                                                                                                                          | SW_EVENT_ANALYZER                                                                                                                                                                                                                                                                                                                                                                                                                                               | default                                           |                                                                                              |
| receiver-register       | default       | gRPC and HTTPRestful services that provide service, service instance and endpoint register.                                                                              | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| receiver-trace          | default       | gRPC and HTTPRestful services that accept SkyWalking format traces.                                                                                                      | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| receiver-jvm            | default       | gRPC services that accept JVM metrics data.                                                                                                                              | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| receiver-clr            | default       | gRPC services that accept .Net CLR metrics data.                                                                                                                         | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| receiver-profile        | default       | gRPC services that accept profile task status and snapshot reporter.                                                                                                     | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| receiver-zabbix         | default       | TCP receiver accepts Zabbix format metrics.                                                                                                                              | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| -                       | -             | port                                                                                                                                                                     | Exported TCP port. Zabbix agent could connect and transport data.                                                                                                                                                                                                                                                                                                                                                                                               | SW_RECEIVER_ZABBIX_PORT                           | 10051                                                                                        |
| -                       | -             | host                                                                                                                                                                     | Binds to host.                                                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_RECEIVER_ZABBIX_HOST                           | 0.0.0.0                                                                                      |
| -                       | -             | activeFiles                                                                                                                                                              | Enables config when agent request is received.                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_RECEIVER_ZABBIX_ACTIVE_FILES                   | agent                                                                                        |
| service-mesh            | default       | gRPC services that accept data from inbound mesh probes.                                                                                                                 | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| envoy-metric            | default       | Envoy `metrics_service` and `ALS(access log service)` are supported by this receiver. The OAL script supports all GAUGE type metrics.                                    | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| -                       | -             | acceptMetricsService                                                                                                                                                     | Starts Envoy Metrics Service analysis.                                                                                                                                                                                                                                                                                                                                                                                                                          | SW_ENVOY_METRIC_SERVICE                           | true                                                                                         |
| -                       | -             | alsHTTPAnalysis                                                                                                                                                          | Starts Envoy HTTP Access Log Service analysis. Value = `k8s-mesh` means starting the analysis.                                                                                                                                                                                                                                                                                                                                                                  | SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS                 | -                                                                                            |
| -                       | -             | alsTCPAnalysis                                                                                                                                                           | Starts Envoy TCP Access Log Service analysis. Value = `k8s-mesh` means starting the analysis.                                                                                                                                                                                                                                                                                                                                                                   | SW_ENVOY_METRIC_ALS_TCP_ANALYSIS                  | -                                                                                            |
| -                       | -             | k8sServiceNameRule                                                                                                                                                       | `k8sServiceNameRule` allows you to customize the service name in ALS via Kubernetes metadata. The available variables are `pod` and `service`. E.g. you can use `${service.metadata.name}-${pod.metadata.labels.version}` to append the version number to the service name. Note that when using environment variables to pass this configuration, use single quotes(`''`) to avoid being evaluated by the shell.                                               | -                                                 |                                                                                              |
| receiver-otel           | default       | A receiver for analyzing metrics data from OpenTelemetry.                                                                                                                | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| -                       | -             | enabledHandlers                                                                                                                                                          | Enabled handlers for otel.                                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_OTEL_RECEIVER_ENABLED_HANDLERS                 | -                                                                                            |
| -                       | -             | enabledOtelRules                                                                                                                                                           | Enabled metric rules for OC handler.                                                                                                                                                                                                                                                                                                                                                                                                                            | SW_OTEL_RECEIVER_ENABLED_OTEL_RULES                 | -                                                                                            |
| receiver-zipkin         | default       | A receiver for Zipkin traces.                                                                                                                                            | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| -                       | -             | sampleRate                                                                                                                                                         | The sample rate precision is 1/10000, should be between 0 and 10000                                                                                                                                                                                                                                                                                                                                                                                             | SW_ZIPKIN_SAMPLE_RATE             | 10000                                                                                        |
| -                       | -             | searchableTracesTags                                                                                                                                                     | Defines a set of span tag keys which are searchable. Multiple values are separated by commas. The max length of key=value should be less than 256 or will be dropped.                                                                                                                                                                                                                                                                                                                                                                    | SW_ZIPKIN_SEARCHABLE_TAG_KEYS                     | http.method                                                                                  |
| -                       | -             | enableHttpCollector                                                                                                                                                     | Enable Http Collector.                                                                                                                                                                                                                                                                                                                                                                                                                                          | SW_ZIPKIN_HTTP_COLLECTOR_ENABLED                     | true                                                                                         |
| -                       | -             | restHost                                                                                                                                                                 | Binding IP of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_RECEIVER_ZIPKIN_REST_HOST                      | 0.0.0.0                                                                                      |
| -                       | -             | restPort                                                                                                                                                                 | Binding port of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_RECEIVER_ZIPKIN_REST_PORT                      | 9411                                                                                         |
| -                       | -             | restContextPath                                                                                                                                                          | Web context path of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_RECEIVER_ZIPKIN_REST_CONTEXT_PATH              | /                                                                                            |
| -                       | -             | restMaxThreads                                                                                                                                                           | Maximum thread number of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_RECEIVER_ZIPKIN_REST_MAX_THREADS               | 200                                                                                          |
| -                       | -             | restIdleTimeOut                                                                                                                                                          | Connector idle timeout of RESTful services (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                                   | SW_RECEIVER_ZIPKIN_REST_IDLE_TIMEOUT              | 30000                                                                                        |
| -                       | -             | restAcceptQueueSize                                                                                                                                                      | Maximum request header size accepted.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_RECEIVER_ZIPKIN_REST_QUEUE_SIZE                | 0                                                                                            |
| -                       | -             | enableKafkaCollector                                                                                                                                                      | Enable Kafka Collector.                                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_ZIPKIN_KAFKA_COLLECTOR_ENABLED                | false                                                                                        |
| -                       | -             | kafkaBootstrapServers                                                                                                                                                         | Kafka ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG.                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_ZIPKIN_KAFKA_SERVERS                          | localhost:9092                                                                               |
| -                       | -             | kafkaGroupId                                                                                                                                                                  | Kafka ConsumerConfig.GROUP_ID_CONFIG.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_ZIPKIN_KAFKA_GROUP_ID                                                 | zipkin                                                                                       |
| -                       | -             | kafkaTopic                                                                                                                                                    | Kafka Topics.                                                                                                                                                                                                                                                                                                                                                                                                                                                   | SW_ZIPKIN_KAFKA_TOPIC                                                 | zipkin                                                                                       |
| -                       | -             | kafkaConsumerConfig                                                                                                                                                               | Kafka consumer config, JSON format as Properties. If it contains the same key with above, would override.                                                                                                                                                                                                                                                                                                                                                       | SW_ZIPKIN_KAFKA_CONSUMER_CONFIG                       | "{\"auto.offset.reset\":\"earliest\",\"enable.auto.commit\":true}"                           |
| -                       | -             | kafkaConsumers                                                                                                                                                                | The number of consumers to create.                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_ZIPKIN_KAFKA_CONSUMERS                        | 1                                                                                            |
| -                       | -             | kafkaHandlerThreadPoolSize                                                                                                                                               | Pool size of Kafka message handler executor.                                                                                                                                                                                                                                                                                                                                                                                                                    | SW_ZIPKIN_KAFKA_HANDLER_THREAD_POOL_SIZE                 | CPU core * 2                                                                                 |
| -                       | -             | kafkaHandlerThreadPoolQueueSize                                                                                                                                          | Queue size of Kafka message handler executor.                                                                                                                                                                                                                                                                                                                                                                                                                   | SW_ZIPKIN_KAFKA_HANDLER_THREAD_POOL_QUEUE_SIZE           | 10000                                                                                        |
| kafka-fetcher           | default       | Read SkyWalking's native metrics/logs/traces through Kafka server.                                                                                                       | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| -                       | -             | bootstrapServers                                                                                                                                                         | A list of host/port pairs to use for establishing the initial connection to the Kafka cluster.                                                                                                                                                                                                                                                                                                                                                                  | SW_KAFKA_FETCHER_SERVERS                          | localhost:9092                                                                               |
| -                       | -             | namespace                                                                                                                                                                | Namespace aims to isolate multi OAP cluster when using the same Kafka cluster. If you set a namespace for Kafka fetcher, OAP will add a prefix to topic name. You should also set namespace in `agent.config`. The property is named `plugin.kafka.namespace`.                                                                                                                                                                                                  | SW_NAMESPACE                                      | -                                                                                            |
| -                       | -             | groupId                                                                                                                                                                  | A unique string that identifies the consumer group to which this consumer belongs.                                                                                                                                                                                                                                                                                                                                                                              | -                                                 | skywalking-consumer                                                                          |
| -                       | -             | createTopicIfNotExist                                                                                                                                                    | If true, this creates Kafka topic (if it does not already exist).                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 | true                                                                                         |
| -                       | -             | partitions                                                                                                                                                               | The number of partitions for the topic being created.                                                                                                                                                                                                                                                                                                                                                                                                           | SW_KAFKA_FETCHER_PARTITIONS                       | 3                                                                                            |
| -                       | -             | consumers                                                                                                                                                                | The number of consumers to create.                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_KAFKA_FETCHER_CONSUMERS                        | 1                                                                                            |
| -                       | -             | enableNativeProtoLog                                                                                                                                                     | Enables fetching and handling native proto log data.                                                                                                                                                                                                                                                                                                                                                                                                            | SW_KAFKA_FETCHER_ENABLE_NATIVE_PROTO_LOG          | true                                                                                         |
| -                       | -             | enableNativeJsonLog                                                                                                                                                      | Enables fetching and handling native json log data.                                                                                                                                                                                                                                                                                                                                                                                                             | SW_KAFKA_FETCHER_ENABLE_NATIVE_JSON_LOG           | true                                                                                         |
| -                       | -             | replicationFactor                                                                                                                                                        | The replication factor for each partition in the topic being created.                                                                                                                                                                                                                                                                                                                                                                                           | SW_KAFKA_FETCHER_PARTITIONS_FACTOR                | 2                                                                                            |
| -                       | -             | kafkaHandlerThreadPoolSize                                                                                                                                               | Pool size of Kafka message handler executor.                                                                                                                                                                                                                                                                                                                                                                                                                    | SW_KAFKA_HANDLER_THREAD_POOL_SIZE                 | CPU core * 2                                                                                 |
| -                       | -             | kafkaHandlerThreadPoolQueueSize                                                                                                                                          | Queue size of Kafka message handler executor.                                                                                                                                                                                                                                                                                                                                                                                                                   | SW_KAFKA_HANDLER_THREAD_POOL_QUEUE_SIZE           | 10000                                                                                        |
| -                       | -             | topicNameOfMeters                                                                                                                                                        | Kafka topic name for meter system data.                                                                                                                                                                                                                                                                                                                                                                                                                         | -                                                 | skywalking-meters                                                                            |
| -                       | -             | topicNameOfMetrics                                                                                                                                                       | Kafka topic name for JVM metrics data.                                                                                                                                                                                                                                                                                                                                                                                                                          | -                                                 | skywalking-metrics                                                                           |
| -                       | -             | topicNameOfProfiling                                                                                                                                                     | Kafka topic name for profiling data.                                                                                                                                                                                                                                                                                                                                                                                                                            | -                                                 | skywalking-profilings                                                                        |
| -                       | -             | topicNameOfTracingSegments                                                                                                                                               | Kafka topic name for tracing data.                                                                                                                                                                                                                                                                                                                                                                                                                              | -                                                 | skywalking-segments                                                                          |
| -                       | -             | topicNameOfManagements                                                                                                                                                   | Kafka topic name for service instance reporting and registration.                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 | skywalking-managements                                                                       |
| -                       | -             | topicNameOfLogs                                                                                                                                                          | Kafka topic name for native proto log data.                                                                                                                                                                                                                                                                                                                                                                                                                     | -                                                 | skywalking-logs                                                                              |
| -                       | -             | topicNameOfJsonLogs                                                                                                                                                      | Kafka topic name for native json log data.                                                                                                                                                                                                                                                                                                                                                                                                                      | -                                                 | skywalking-logs-json                                                                         |
| receiver-browser        | default       | gRPC services that accept browser performance data and error log.                                                                                                        | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 | -                                                                                            |
| -                       | -             | sampleRate                                                                                                                                                               | Sampling rate for receiving trace. Precise to 1/10000. 10000 means sampling rate of 100% by default.                                                                                                                                                                                                                                                                                                                                                            | SW_RECEIVER_BROWSER_SAMPLE_RATE                   | 10000                                                                                        |
| query                   | graphql       | -                                                                                                                                                                        | GraphQL query implementation.                                                                                                                                                                                                                                                                                                                                                                                                                                   | -                                                 |                                                                                              |
| -                       | -             | enableLogTestTool                                                                                                                                                        | Enable the log testing API to test the LAL. **NOTE**: This API evaluates untrusted code on the OAP server. A malicious script can do significant damage (steal keys and secrets, remove files and directories, install malware, etc). As such, please enable this API only when you completely trust your users.                                                                                                                                                | SW_QUERY_GRAPHQL_ENABLE_LOG_TEST_TOOL             | false                                                                                        |
| -                       | -             | maxQueryComplexity                                                                                                                                                       | Maximum complexity allowed for the GraphQL query that can be used to abort a query if the total number of data fields queried exceeds the defined threshold.                                                                                                                                                                                                                                                                                                    | SW_QUERY_MAX_QUERY_COMPLEXITY                     | 1000                                                                                         |
| -                       | -             | enableUpdateUITemplate                                                                                                                                                   | Allow user add，disable and update UI template.                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_ENABLE_UPDATE_UI_TEMPLATE                      | false                                                                                        |
| -                       | -             | enableOnDemandPodLog                                                                                                                                                     | Ondemand Pod log: fetch the Pod logs on users' demand, the logs are fetched and displayed in real time, and are not persisted in any kind. This is helpful when users want to do some experiments and monitor the logs and see what's happing inside the service. Note: if you print secrets in the logs, they are also visible to the UI, so for the sake of security, this feature is disabled by default, please set this configuration to enable the feature manually.                                                                                                                                                                                                                                                                                                                                                         | SW_ENABLE_ON_DEMAND_POD_LOG                      | false                                                                                        |
| query-zipkin                   | default       | -                                                                                                                                                                        | This module is for Zipkin query API and support zipkin-lens UI                                                                                                                                                                                                                                                                                                                                                                                                                                   | -                                                 |                                                                                              |
| -                       | -             | restHost                                                                                                                                                                 | Binding IP of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_QUERY_ZIPKIN_REST_HOST                      | 0.0.0.0                                                                                      |
| -                       | -             | restPort                                                                                                                                                                 | Binding port of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_QUERY_ZIPKIN_REST_PORT                      | 9412                                                                                         |
| -                       | -             | restContextPath                                                                                                                                                          | Web context path of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_QUERY_ZIPKIN_REST_CONTEXT_PATH              | zipkin                                                                                       |
| -                       | -             | restMaxThreads                                                                                                                                                           | Maximum thread number of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_QUERY_ZIPKIN_REST_MAX_THREADS               | 200                                                                                          |
| -                       | -             | restIdleTimeOut                                                                                                                                                          | Connector idle timeout of RESTful services (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                                   | SW_QUERY_ZIPKIN_REST_IDLE_TIMEOUT              | 30000                                                                                        |
| -                       | -             | restAcceptQueueSize                                                                                                                                                      | Maximum request header size accepted.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_QUERY_ZIPKIN_REST_QUEUE_SIZE                | 0                                                                                            |
| -                       | -             | lookback                                                                                                                                                        | Default look back for traces and autocompleteTags, 1 day in millis                                                                                                                                             | SW_QUERY_ZIPKIN_LOOKBACK             | 86400000                                                                                     |
| -                       | -             | namesMaxAge                                                                                                                                                       | The Cache-Control max-age (seconds) for serviceNames, remoteServiceNames and spanNames                                                                                                                                                                                                                                                                                                   | SW_QUERY_ZIPKIN_NAMES_MAX_AGE                     | 300                                                                                          |
| -                       | -             | uiQueryLimit                                                                                                                                                   | Default traces query max size                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_QUERY_ZIPKIN_UI_QUERY_LIMIT                      | 10                                                                                           |
| -                       | -             | uiDefaultLookback                                                                                                                                                       | Default look back on the UI for search traces, 15 minutes in millis                                                                                                                                                                                                                                                                                                   | SW_QUERY_ZIPKIN_UI_DEFAULT_LOOKBACK                     | 900000                                                                                       |
| promql                   | default       | -                                                                                                                                                                        | This module is for PromQL API.                                                                                                                                                                                                                                                                                                                                                                                                                                        | -                                                 |                                                                                              |
| -                       | -             | restHost                                                                                                                                                                 | Binding IP of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                                 | SW_PROMQL_REST_HOST                      | 0.0.0.0                                                                                      |
| -                       | -             | restPort                                                                                                                                                                 | Binding port of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_PROMQL_REST_PORT                      | 9090                                                                                         |
| -                       | -             | restContextPath                                                                                                                                                          | Web context path of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_PROMQL_REST_CONTEXT_PATH              | /                                                                                       |
| -                       | -             | restMaxThreads                                                                                                                                                           | Maximum thread number of RESTful services.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_PROMQL_REST_MAX_THREADS               | 200                                                                                          |
| -                       | -             | restIdleTimeOut                                                                                                                                                          | Connector idle timeout of RESTful services (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                                   | SW_PROMQL_REST_IDLE_TIMEOUT              | 30000                                                                                        |
| -                       | -             | restAcceptQueueSize                                                                                                                                                      | Maximum request header size accepted.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_PROMQL_REST_QUEUE_SIZE                | 0                                                                                            |
| alarm                   | default       | -                                                                                                                                                                        | Read [alarm doc](backend-alarm.md) for more details.                                                                                                                                                                                                                                                                                                                                                                                                            | -                                                 |                                                                                              |
| telemetry               | -             | -                                                                                                                                                                        | Read [telemetry doc](backend-telemetry.md) for more details.                                                                                                                                                                                                                                                                                                                                                                                                    | -                                                 |                                                                                              |
| -                       | none          | -                                                                                                                                                                        | No op implementation.                                                                                                                                                                                                                                                                                                                                                                                                                                           | -                                                 |                                                                                              |
| -                       | prometheus    | host                                                                                                                                                                     | Binding host for Prometheus server fetching data.                                                                                                                                                                                                                                                                                                                                                                                                               | SW_TELEMETRY_PROMETHEUS_HOST                      | 0.0.0.0                                                                                      |
| -                       | -             | port                                                                                                                                                                     | Binding port for Prometheus server fetching data.                                                                                                                                                                                                                                                                                                                                                                                                               | SW_TELEMETRY_PROMETHEUS_PORT                      | 1234                                                                                         |
| configuration           | -             | -                                                                                                                                                                        | Read [dynamic configuration doc](dynamic-config.md) for more details.                                                                                                                                                                                                                                                                                                                                                                                           | -                                                 |                                                                                              |
| -                       | grpc          | host                                                                                                                                                                     | DCS server binding hostname.                                                                                                                                                                                                                                                                                                                                                                                                                                    | SW_DCS_SERVER_HOST                                | -                                                                                            |
| -                       | -             | port                                                                                                                                                                     | DCS server binding port.                                                                                                                                                                                                                                                                                                                                                                                                                                        | SW_DCS_SERVER_PORT                                | 80                                                                                           |
| -                       | -             | clusterName                                                                                                                                                              | Cluster name when reading the latest configuration from DSC server.                                                                                                                                                                                                                                                                                                                                                                                             | SW_DCS_CLUSTER_NAME                               | SkyWalking                                                                                   |
| -                       | -             | period                                                                                                                                                                   | The period of reading data from DSC server by the OAP (in seconds).                                                                                                                                                                                                                                                                                                                                                                                             | SW_DCS_PERIOD                                     | 20                                                                                           |
| -                       | apollo        | apolloMeta                                                                                                                                                               | `apollo.meta` in Apollo.                                                                                                                                                                                                                                                                                                                                                                                                                                        | SW_CONFIG_APOLLO                                  | http://localhost:8080                                                                        |
| -                       | -             | apolloCluster                                                                                                                                                            | `apollo.cluster` in Apollo.                                                                                                                                                                                                                                                                                                                                                                                                                                     | SW_CONFIG_APOLLO_CLUSTER                          | default                                                                                      |
| -                       | -             | apolloEnv                                                                                                                                                                | `env` in Apollo.                                                                                                                                                                                                                                                                                                                                                                                                                                                | SW_CONFIG_APOLLO_ENV                              | -                                                                                            |
| -                       | -             | appId                                                                                                                                                                    | `app.id` in Apollo.                                                                                                                                                                                                                                                                                                                                                                                                                                             | SW_CONFIG_APOLLO_APP_ID                           | skywalking                                                                                   |
| -                       | -             | period                                                                                                                                                                   | The period of data sync (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_APOLLO_PERIOD                           | 60                                                                                           |
| -                       | zookeeper     | namespace                                                                                                                                                                | The namespace (represented by root path) that isolates the configurations in the Zookeeper.                                                                                                                                                                                                                                                                                                                                                                     | SW_CONFIG_ZK_NAMESPACE                            | `/`, root path                                                                               |
| -                       | -             | hostPort                                                                                                                                                                 | Hosts and ports of Zookeeper Cluster.                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_ZK_HOST_PORT                            | localhost:2181                                                                               |
| -                       | -             | baseSleepTimeMs                                                                                                                                                          | The period of Zookeeper client between two retries (in milliseconds).                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_ZK_BASE_SLEEP_TIME_MS                   | 1000                                                                                         |
| -                       | -             | maxRetries                                                                                                                                                               | The maximum retry time.                                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_CONFIG_ZK_MAX_RETRIES                          | 3                                                                                            |
| -                       | -             | period                                                                                                                                                                   | The period of data sync (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_ZK_PERIOD                               | 60                                                                                           |
| -                       | etcd          | endpoints                                                                                                                                                                | Hosts and ports for etcd cluster (separated by commas if multiple).                                                                                                                                                                                                                                                                                                                                                                                             | SW_CONFIG_ETCD_ENDPOINTS                          | http://localhost:2379                                                                        |
| -                       | -             | namespace                                                                                                                                                                | Namespace for SkyWalking cluster.                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_CONFIG_ETCD_NAMESPACE                          | /skywalking                                                                                  |
| -                       | -             | authentication                                                                                                                                                           | Indicates whether there is authentication.                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_CONFIG_ETCD_AUTHENTICATION                     | false                                                                                        |
| -                       | -             | user                                                                                                                                                                     | Etcd auth username.                                                                                                                                                                                                                                                                                                                                                                                                                                             | SW_CONFIG_ETCD_USER                               |                                                                                              |
| -                       | -             | password                                                                                                                                                                 | Etcd auth password.                                                                                                                                                                                                                                                                                                                                                                                                                                             | SW_CONFIG_ETCD_PASSWORD                           |                                                                                              |
| -                       | -             | period                                                                                                                                                                   | The period of data sync (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_ZK_PERIOD                               | 60                                                                                           |
| -                       | consul        | hostPort                                                                                                                                                                 | Hosts and ports for Consul cluster.                                                                                                                                                                                                                                                                                                                                                                                                                             | SW_CONFIG_CONSUL_HOST_AND_PORTS                   | localhost:8500                                                                               |
| -                       | -             | aclToken                                                                                                                                                                 | ACL Token of Consul. Empty string means `without ACL token`.                                                                                                                                                                                                                                                                                                                                                                                                    | SW_CONFIG_CONSUL_ACL_TOKEN                        | -                                                                                            |
| -                       | -             | period                                                                                                                                                                   | The period of data sync (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_CONSUL_PERIOD                           | 60                                                                                           |
| -                       | k8s-configmap | namespace                                                                                                                                                                | Deployment namespace of the config map.                                                                                                                                                                                                                                                                                                                                                                                                                         | SW_CLUSTER_K8S_NAMESPACE                          | default                                                                                      |
| -                       | -             | labelSelector                                                                                                                                                            | Labels for locating configmap.                                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_CLUSTER_K8S_LABEL                              | app=collector,release=skywalking                                                             |
| -                       | -             | period                                                                                                                                                                   | The period of data sync (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_ZK_PERIOD                               | 60                                                                                           |
| -                       | nacos         | serverAddr                                                                                                                                                               | Nacos Server Host.                                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_CONFIG_NACOS_SERVER_ADDR                       | 127.0.0.1                                                                                    |
| -                       | -             | port                                                                                                                                                                     | Nacos Server Port.                                                                                                                                                                                                                                                                                                                                                                                                                                              | SW_CONFIG_NACOS_SERVER_PORT                       | 8848                                                                                         |
| -                       | -             | group                                                                                                                                                                    | Nacos Configuration namespace.                                                                                                                                                                                                                                                                                                                                                                                                                                  | SW_CONFIG_NACOS_SERVER_NAMESPACE                  | -                                                                                            |
| -                       | -             | period                                                                                                                                                                   | The period of data sync (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_CONFIG_NACOS_PERIOD                     | 60                                                                                           |
| -                       | -             | username                                                                                                                                                                 | Nacos Auth username.                                                                                                                                                                                                                                                                                                                                                                                                                                            | SW_CONFIG_NACOS_USERNAME                          | -                                                                                            |
| -                       | -             | password                                                                                                                                                                 | Nacos Auth password.                                                                                                                                                                                                                                                                                                                                                                                                                                            | SW_CONFIG_NACOS_PASSWORD                          | -                                                                                            |
| -                       | -             | accessKey                                                                                                                                                                | Nacos Auth accessKey.                                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_NACOS_ACCESSKEY                         | -                                                                                            |
| -                       | -             | secretKey                                                                                                                                                                | Nacos Auth secretKey.                                                                                                                                                                                                                                                                                                                                                                                                                                           | SW_CONFIG_NACOS_SECRETKEY                         | -                                                                                            |
| exporter                | default       | enableGRPCMetrics                                                                                                                                                        | Enable gRPC metrics exporter.                                                                                                                                                                                                                                                                                                                                                                                                                                   | SW_EXPORTER_ENABLE_GRPC_METRICS                   | false                                                                                        |
| -                       | -             | gRPCTargetHost                                                                                                                                                           | The host of target gRPC server for receiving export data                                                                                                                                                                                                                                                                                                                                                                                                       | SW_EXPORTER_GRPC_HOST                             | 127.0.0.1                                                                                    |
| -                       | -             | gRPCTargetPort                                                                                                                                                           | The port of target gRPC server for receiving export data.                                                                                                                                                                                                                                                                                                                                                                                                       | SW_EXPORTER_GRPC_PORT                             | 9870                                                                                         |
| -                       | -             | enableKafkaTrace                                                                                                                                                         | Enable Kafka trace exporter.                                                                                                                                                                                                                                                                                                                                                                                                       | SW_EXPORTER_ENABLE_KAFKA_TRACE                             | false                                                                                        |
| -                       | -             | enableKafkaLog                                                                                                                                                           | Enable Kafka log exporter.                                                                                                                                                                                                                                                                                                                                                                                                       | SW_EXPORTER_ENABLE_KAFKA_LOG                             | false                                                                                        |
| -                       | -             | kafkaBootstrapServers                                                                                                                                                    | A list of host/port pairs to use for establishing the initial connection to the Kafka cluster.                                                                                                                                                                                                                                                                                                                                                                                                      | SW_EXPORTER_KAFKA_SERVERS                             | localhost:9092                                                                               |
| -                       | -             | kafkaProducerConfig                                                                                                                                                      | Kafka producer config, JSON format as Properties.                                                                                                                                                                                                                                                                                                                                                                                                     | SW_EXPORTER_KAFKA_PRODUCER_CONFIG                             | -                                                                                            |
| -                       | -             | kafkaTopicTrace                                                                                                                                                          | Kafka topic name for trace.                                                                                                                                                                                                                                                                                                                                                                                                        | SW_EXPORTER_KAFKA_TOPIC_TRACE                             | skywalking-export-trace                                                                      |
| -                       | -             | kafkaTopicLog                                                                                                                                                            | Kafka topic name for log.                                                                                                                                                                                                                                                                                                                                                                                                      | SW_EXPORTER_KAFKA_TOPIC_LOG                             | skywalking-export-log                                                                        |
| health-checker          | default       | checkIntervalSeconds                                                                                                                                                     | The period of checking OAP internal health status (in seconds).                                                                                                                                                                                                                                                                                                                                                                                                 | SW_HEALTH_CHECKER_INTERVAL_SECONDS                | 5                                                                                            |
| configuration-discovery | default       | disableMessageDigest                                                                                                                                                     | If true, agent receives the latest configuration every time, even without making any changes. By default, OAP uses the SHA512 message digest mechanism to detect changes in configuration.                                                                                                                                                                                                                                                                      | SW_DISABLE_MESSAGE_DIGEST                         | false                                                                                        |
| receiver-event          | default       | gRPC services that handle events data.                                                                                                                                   | -                                                                                                                                                                                                                                                                                                                                                                                                                                                               | -                                                 |                                                                                              |
| aws-firehose-receiver   | default       | host                                                                                                                                                                     | Binding IP of HTTP server                                                                                                                                                                                                                                                                                                                                                                                                                                       | SW_RECEIVER_AWS_FIREHOSE_HTTP_HOST                     | 0.0.0.0                                                                                            |
| -                       | -             | port                                                                                                                                                                     | Binding port of HTTP server                                                                                                                                                                                                                                                                                                                                                                                                                                     | SW_RECEIVER_AWS_FIREHOSE_HTTP_PORT                     | 12801                                                                                             |
| -                       | -             | contextPath                                                                                                                                                              | Context path of HTTP server                                                                                                                                                                                                                                                                                                                                                                                                                                     | SW_RECEIVER_AWS_FIREHOSE_HTTP_CONTEXT_PATH             | /                                                                                             |
| -                       | -             | maxThreads                                                                                                                                                               | Max Thtread number of HTTP server                                                                                                                                                                                                                                                                                                                                                                                                                               | SW_RECEIVER_AWS_FIREHOSE_HTTP_MAX_THREADS              | 200                                                                                           |
| -                       | -             | idleTimeOut                                                                                                                                                              | Idle timeout of a connection for keep-alive.                                                                                                                                                                                                                                                                                                                                                                                                                    | SW_RECEIVER_AWS_FIREHOSE_HTTP_IDLE_TIME_OUT            | 30000                                                                                               |
| -                       | -             | acceptQueueSize                                                                                                                                                          | Maximum allowed number of open connections                                                                                                                                                                                                                                                                                                                                                                                                                      | SW_RECEIVER_AWS_FIREHOSE_HTTP_ACCEPT_QUEUE_SIZE        | 0                                                                                          |
| -                       | -             | maxRequestHeaderSize                                                                                                                                                     | Maximum length of all headers in an HTTP/1 response                                                                                                                                                                                                                                                                                                                                                                                                             | SW_RECEIVER_AWS_FIREHOSE_HTTP_MAX_REQUEST_HEADER_SIZE  | 8192                                                                                             |

## Note

¹ System Environment Variable name could be declared and changed in `application.yml`. The names listed here are simply
provided in the default `application.yml` file.
