--- title: 用 Docker 部署 TDengine description: '本章主要介绍如何在容器中启动 TDengine 服务并访问它' --- 本章主要介绍如何在容器中启动 TDengine 服务并访问它。可以在 docker run 命令行中或者 docker-compose 文件中使用环境变量来控制容器中服务的行为。 ## 启动 TDengine TDengine 镜像启动时默认激活 HTTP 服务,使用下列命令 ```shell docker run -d --name tdengine -p 6041:6041 tdengine/tdengine ``` 以上命令启动了一个名为“tdengine”的容器,并把其中的 HTTP 服务的端 6041 映射到了主机端口 6041。使用如下命令可以验证该容器中提供的 HTTP 服务是否可用: ```shell curl -u root:taosdata -d "show databases" localhost:6041/rest/sql ``` 使用如下命令可以在该容器中执行 TDengine 的客户端 taos 对 TDengine 进行访问: ```shell $ docker exec -it tdengine taos Welcome to the TDengine shell from Linux, Client Version:2.4.0.0 Copyright (c) 2020 by TAOS Data, Inc. All rights reserved. taos> show databases; name | created_time | ntables | vgroups | replica | quorum | days | keep | cache(MB) | blocks | minrows | maxrows | wallevel | fsync | comp | cachelast | precision | update | status | ==================================================================================================================================================================================================================================================================================== log | 2022-01-17 13:57:22.270 | 10 | 1 | 1 | 1 | 10 | 30 | 1 | 3 | 100 | 4096 | 1 | 3000 | 2 | 0 | us | 0 | ready | Query OK, 1 row(s) in set (0.002843s) ``` 因为运行在容器中的 TDengine 服务端使用容器的 hostname 建立连接,使用 taos shell 或者各种连接器(例如 JDBC-JNI)从容器外访问容器内的 TDengine 比较复杂,所以上述方式是访问容器中 TDengine 服务的最简单的方法,适用于一些简单场景。如果在一些复杂场景下想要从容器化使用 taos shell 或者各种连接器访问容器中的 TDengine 服务,请参考下一节。 ## 在 host 网络上启动 TDengine ```shell docker run -d --name tdengine --network host tdengine/tdengine ``` 上面的命令在 host 网络上启动 TDengine,并使用主机的 FQDN 建立连接而不是使用容器的 hostname 。这种方式和在主机上使用 `systemctl` 启动 TDengine 效果相同。在主机已安装 TDengine 客户端情况下,可以直接使用下面的命令访问它。 ```shell $ taos Welcome to the TDengine shell from Linux, Client Version:2.4.0.0 Copyright (c) 2020 by TAOS Data, Inc. All rights reserved. taos> show dnodes; id | end_point | vnodes | cores | status | role | create_time | offline reason | ====================================================================================================================================== 1 | myhost:6030 | 1 | 8 | ready | any | 2022-01-17 22:10:32.619 | | Query OK, 1 row(s) in set (0.003233s) ``` ## 以指定的 hostname 和 port 启动 TDengine 利用 `TAOS_FQDN` 环境变量或者 `taos.cfg` 中的 `fqdn` 配置项可以使 TDengine 在指定的 hostname 上建立连接。这种方式可以为部署提供更大的灵活性。 ```shell docker run -d \ --name tdengine \ -e TAOS_FQDN=tdengine \ -p 6030-6049:6030-6049 \ -p 6030-6049:6030-6049/udp \ tdengine/tdengine ``` 上面的命令在容器中启动一个 TDengine 服务,其所监听的 hostname 为 tdengine ,并将容器的 6030 到 6049 端口段映射到主机的 6030 到 6049 端口段 (tcp 和 udp 都需要映射)。如果主机上该端口段已经被占用,可以修改上述命令指定一个主机上空闲的端口段。如果 `rpcForceTcp` 被设置为 `1` ,可以只映射 tcp 协议。 接下来,要确保 "tdengine" 这个 hostname 在 `/etc/hosts` 中可解析。 ```shell echo 127.0.0.1 tdengine |sudo tee -a /etc/hosts ``` 最后,可以从 taos shell 或者任意连接器以 "tdengine" 为服务端地址访问 TDengine 服务。 ```shell taos -h tdengine -P 6030 ``` 如果 `TAOS_FQDN` 被设置为与所在主机名相同,则效果与 “在 host 网络上启动 TDengine” 相同。 ## 在指定网络上启动 TDengine 也可以在指定的特定网络上启动 TDengine。下面是详细步骤: 1. 首先,创建一个 docker 网络,命名为 td-net ```shell docker network create td-net ``` 2. 启动 TDengine 以下命令在 td-net 网络上启动 TDengine 服务 ```shell docker run -d --name tdengine --network td-net \ -e TAOS_FQDN=tdengine \ tdengine/tdengine ``` 3. 在同一网络上的另一容器中启动 TDengine 客户端 ```shell docker run --rm -it --network td-net -e TAOS_FIRST_EP=tdengine tdengine/tdengine taos # or #docker run --rm -it --network td-net -e tdengine/tdengine taos -h tdengine ``` ## 在容器中启动客户端应用 如果想在容器中启动自己的应用的话,需要将相应的对 TDengine 的依赖也要加入到镜像中,例如: ```docker FROM ubuntu:20.04 RUN apt-get update && apt-get install -y wget ENV TDENGINE_VERSION=2.4.0.0 RUN wget -c https://www.taosdata.com/assets-download/TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz \ && tar xvf TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz \ && cd TDengine-client-${TDENGINE_VERSION} \ && ./install_client.sh \ && cd ../ \ && rm -rf TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz TDengine-client-${TDENGINE_VERSION} ## add your application next, eg. go, build it in builder stage, copy the binary to the runtime #COPY --from=builder /path/to/build/app /usr/bin/ #CMD ["app"] ``` 以下是一个 go 应用程序的示例: ```go /* * In this test program, we'll create a database and insert 4 records then select out. */ package main import ( "database/sql" "flag" "fmt" "time" _ "github.com/taosdata/driver-go/v2/taosSql" ) type config struct { hostName string serverPort string user string password string } var configPara config var taosDriverName = "taosSql" var url string func init() { flag.StringVar(&configPara.hostName, "h", "", "The host to connect to TDengine server.") flag.StringVar(&configPara.serverPort, "p", "", "The TCP/IP port number to use for the connection to TDengine server.") flag.StringVar(&configPara.user, "u", "root", "The TDengine user name to use when connecting to the server.") flag.StringVar(&configPara.password, "P", "taosdata", "The password to use when connecting to the server.") flag.Parse() } func printAllArgs() { fmt.Printf("============= args parse result: =============\n") fmt.Printf("hostName: %v\n", configPara.hostName) fmt.Printf("serverPort: %v\n", configPara.serverPort) fmt.Printf("usr: %v\n", configPara.user) fmt.Printf("password: %v\n", configPara.password) fmt.Printf("================================================\n") } func main() { printAllArgs() url = "root:taosdata@/tcp(" + configPara.hostName + ":" + configPara.serverPort + ")/" taos, err := sql.Open(taosDriverName, url) checkErr(err, "open database error") defer taos.Close() taos.Exec("create database if not exists test") taos.Exec("use test") taos.Exec("create table if not exists tb1 (ts timestamp, a int)") _, err = taos.Exec("insert into tb1 values(now, 0)(now+1s,1)(now+2s,2)(now+3s,3)") checkErr(err, "failed to insert") rows, err := taos.Query("select * from tb1") checkErr(err, "failed to select") defer rows.Close() for rows.Next() { var r struct { ts time.Time a int } err := rows.Scan(&r.ts, &r.a) if err != nil { fmt.Println("scan error:\n", err) return } fmt.Println(r.ts, r.a) } } func checkErr(err error, prompt string) { if err != nil { fmt.Println("ERROR: %s\n", prompt) panic(err) } } ``` 如下是完整版本的 dockerfile ```docker FROM golang:1.17.6-buster as builder ENV TDENGINE_VERSION=2.4.0.0 RUN wget -c https://www.taosdata.com/assets-download/TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz \ && tar xvf TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz \ && cd TDengine-client-${TDENGINE_VERSION} \ && ./install_client.sh \ && cd ../ \ && rm -rf TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz TDengine-client-${TDENGINE_VERSION} WORKDIR /usr/src/app/ ENV GOPROXY="https://goproxy.io,direct" COPY ./main.go ./go.mod ./go.sum /usr/src/app/ RUN go env RUN go mod tidy RUN go build FROM ubuntu:20.04 RUN apt-get update && apt-get install -y wget ENV TDENGINE_VERSION=2.4.0.0 RUN wget -c https://www.taosdata.com/assets-download/TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz \ && tar xvf TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz \ && cd TDengine-client-${TDENGINE_VERSION} \ && ./install_client.sh \ && cd ../ \ && rm -rf TDengine-client-${TDENGINE_VERSION}-Linux-x64.tar.gz TDengine-client-${TDENGINE_VERSION} ## add your application next, eg. go, build it in builder stage, copy the binary to the runtime COPY --from=builder /usr/src/app/app /usr/bin/ CMD ["app"] ``` 目前我们已经有了 `main.go`, `go.mod`, `go.sum`, `app.dockerfile`, 现在可以构建出这个应用程序并在 `td-net` 网络上启动它 ```shell $ docker build -t app -f app.dockerfile $ docker run --rm --network td-net app -h tdengine -p 6030 ============= args parse result: ============= hostName: tdengine serverPort: 6030 usr: root password: taosdata ================================================ 2022-01-17 15:56:55.48 +0000 UTC 0 2022-01-17 15:56:56.48 +0000 UTC 1 2022-01-17 15:56:57.48 +0000 UTC 2 2022-01-17 15:56:58.48 +0000 UTC 3 2022-01-17 15:58:01.842 +0000 UTC 0 2022-01-17 15:58:02.842 +0000 UTC 1 2022-01-17 15:58:03.842 +0000 UTC 2 2022-01-17 15:58:04.842 +0000 UTC 3 2022-01-18 01:43:48.029 +0000 UTC 0 2022-01-18 01:43:49.029 +0000 UTC 1 2022-01-18 01:43:50.029 +0000 UTC 2 2022-01-18 01:43:51.029 +0000 UTC 3 ``` ## 用 docker-compose 启动 TDengine 集群 1. 如下 docker-compose 文件启动一个 2 副本、2 管理节点、2 数据节点以及 1 个 arbitrator 的 TDengine 集群。 ```docker version: "3" services: arbitrator: image: tdengine/tdengine:$VERSION command: tarbitrator td-1: image: tdengine/tdengine:$VERSION environment: TAOS_FQDN: "td-1" TAOS_FIRST_EP: "td-1" TAOS_NUM_OF_MNODES: "2" TAOS_REPLICA: "2" TAOS_ARBITRATOR: arbitrator:6042 volumes: - taosdata-td1:/var/lib/taos/ - taoslog-td1:/var/log/taos/ td-2: image: tdengine/tdengine:$VERSION environment: TAOS_FQDN: "td-2" TAOS_FIRST_EP: "td-1" TAOS_NUM_OF_MNODES: "2" TAOS_REPLICA: "2" TAOS_ARBITRATOR: arbitrator:6042 volumes: - taosdata-td2:/var/lib/taos/ - taoslog-td2:/var/log/taos/ volumes: taosdata-td1: taoslog-td1: taosdata-td2: taoslog-td2: ``` :::note - `VERSION` 环境变量被用来设置 tdengine image tag - 在新创建的实例上必须设置 `TAOS_FIRST_EP` 以使其能够加入 TDengine 集群;如果有高可用需求,则需要同时使用 `TAOS_SECOND_EP` - `TAOS_REPLICA` 用来设置缺省的数据库副本数量,其取值范围为[1,3] 在双副本环境下,推荐使用 arbitrator, 用 TAOS_ARBITRATOR 来设置 ::: 2. 启动集群 ```shell $ VERSION=2.4.0.0 docker-compose up -d Creating network "test_default" with the default driver Creating volume "test_taosdata-td1" with default driver Creating volume "test_taoslog-td1" with default driver Creating volume "test_taosdata-td2" with default driver Creating volume "test_taoslog-td2" with default driver Creating test_td-1_1 ... done Creating test_arbitrator_1 ... done Creating test_td-2_1 ... done ``` 3. 查看节点状态 ```shell $ docker-compose ps Name Command State Ports --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- test_arbitrator_1 /usr/bin/entrypoint.sh tar ... Up 6030/tcp, 6031/tcp, 6032/tcp, 6033/tcp, 6034/tcp, 6035/tcp, 6036/tcp, 6037/tcp, 6038/tcp, 6039/tcp, 6040/tcp, 6041/tcp, 6042/tcp test_td-1_1 /usr/bin/entrypoint.sh taosd Up 6030/tcp, 6031/tcp, 6032/tcp, 6033/tcp, 6034/tcp, 6035/tcp, 6036/tcp, 6037/tcp, 6038/tcp, 6039/tcp, 6040/tcp, 6041/tcp, 6042/tcp test_td-2_1 /usr/bin/entrypoint.sh taosd Up 6030/tcp, 6031/tcp, 6032/tcp, 6033/tcp, 6034/tcp, 6035/tcp, 6036/tcp, 6037/tcp, 6038/tcp, 6039/tcp, 6040/tcp, 6041/tcp, 6042/tcp ``` 4. 用 taos shell 查看 dnodes ```shell $ docker-compose exec td-1 taos -s "show dnodes" Welcome to the TDengine shell from Linux, Client Version:2.4.0.0 Copyright (c) 2020 by TAOS Data, Inc. All rights reserved. taos> show dnodes id | end_point | vnodes | cores | status | role | create_time | offline reason | ====================================================================================================================================== 1 | td-1:6030 | 1 | 8 | ready | any | 2022-01-18 02:47:42.871 | | 2 | td-2:6030 | 0 | 8 | ready | any | 2022-01-18 02:47:43.518 | | 0 | arbitrator:6042 | 0 | 0 | ready | arb | 2022-01-18 02:47:43.633 | - | Query OK, 3 row(s) in set (0.000811s) ``` ## taosAdapter 1. taosAdapter 在 TDengine 容器中默认是启动的。如果想要禁用它,在启动时指定环境变量 `TAOS_DISABLE_ADAPTER=true` 2. 同时为了部署灵活起见,可以在独立的容器中启动 taosAdapter ```docker services: # ... adapter: image: tdengine/tdengine:$VERSION command: taosadapter ``` 如果要部署多个 taosAdapter 来提高吞吐量并提供高可用性,推荐配置方式为使用 nginx 等反向代理来提供统一的访问入口。具体配置方法请参考 nginx 的官方文档。如下是示例: ```docker version: "3" networks: inter: api: services: arbitrator: image: tdengine/tdengine:$VERSION command: tarbitrator networks: - inter td-1: image: tdengine/tdengine:$VERSION networks: - inter environment: TAOS_FQDN: "td-1" TAOS_FIRST_EP: "td-1" TAOS_NUM_OF_MNODES: "2" TAOS_REPLICA: "2" TAOS_ARBITRATOR: arbitrator:6042 volumes: - taosdata-td1:/var/lib/taos/ - taoslog-td1:/var/log/taos/ td-2: image: tdengine/tdengine:$VERSION networks: - inter environment: TAOS_FQDN: "td-2" TAOS_FIRST_EP: "td-1" TAOS_NUM_OF_MNODES: "2" TAOS_REPLICA: "2" TAOS_ARBITRATOR: arbitrator:6042 volumes: - taosdata-td2:/var/lib/taos/ - taoslog-td2:/var/log/taos/ adapter: image: tdengine/tdengine:$VERSION command: taosadapter networks: - inter environment: TAOS_FIRST_EP: "td-1" TAOS_SECOND_EP: "td-2" deploy: replicas: 4 nginx: image: nginx depends_on: - adapter networks: - inter - api ports: - 6041:6041 - 6044:6044/udp command: [ "sh", "-c", "while true; do curl -s http://adapter:6041/-/ping >/dev/null && break; done; printf 'server{listen 6041;location /{proxy_pass http://adapter:6041;}}' > /etc/nginx/conf.d/rest.conf; printf 'stream{server{listen 6044 udp;proxy_pass adapter:6044;}}' >> /etc/nginx/nginx.conf;cat /etc/nginx/nginx.conf; nginx -g 'daemon off;'", ] volumes: taosdata-td1: taoslog-td1: taosdata-td2: taoslog-td2: ``` ## 使用 docker swarm 部署 如果要想将基于容器的 TDengine 集群部署在多台主机上,可以使用 docker swarm。首先要在这些主机上建立 docke swarm 集群,请参考 docker 官方文档。 docker-compose 文件可以参考上节。下面是使用 docker swarm 启动 TDengine 的命令: ```shell $ VERSION=2.4.0 docker stack deploy -c docker-compose.yml taos Creating network taos_inter Creating network taos_api Creating service taos_arbitrator Creating service taos_td-1 Creating service taos_td-2 Creating service taos_adapter Creating service taos_nginx ``` 查看和管理 ```shell $ docker stack ps taos ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS 79ni8temw59n taos_nginx.1 nginx:latest TM1701 Running Running about a minute ago 3e94u72msiyg taos_adapter.1 tdengine/tdengine:2.4.0 TM1702 Running Running 56 seconds ago 100amjkwzsc6 taos_td-2.1 tdengine/tdengine:2.4.0 TM1703 Running Running about a minute ago pkjehr2vvaaa taos_td-1.1 tdengine/tdengine:2.4.0 TM1704 Running Running 2 minutes ago tpzvgpsr1qkt taos_arbitrator.1 tdengine/tdengine:2.4.0 TM1705 Running Running 2 minutes ago rvss3g5yg6fa taos_adapter.2 tdengine/tdengine:2.4.0 TM1706 Running Running 56 seconds ago i2augxamfllf taos_adapter.3 tdengine/tdengine:2.4.0 TM1707 Running Running 56 seconds ago lmjyhzccpvpg taos_adapter.4 tdengine/tdengine:2.4.0 TM1708 Running Running 56 seconds ago $ docker service ls ID NAME MODE REPLICAS IMAGE PORTS 561t4lu6nfw6 taos_adapter replicated 4/4 tdengine/tdengine:2.4.0 3hk5ct3q90sm taos_arbitrator replicated 1/1 tdengine/tdengine:2.4.0 d8qr52envqzu taos_nginx replicated 1/1 nginx:latest *:6041->6041/tcp, *:6044->6044/udp 2isssfvjk747 taos_td-1 replicated 1/1 tdengine/tdengine:2.4.0 9pzw7u02ichv taos_td-2 replicated 1/1 tdengine/tdengine:2.4.0 ``` 从上面的输出可以看到有两个 dnode, 和两个 taosAdapter,以及一个 nginx 反向代理服务。 接下来,我们可以减少 taosAdapter 服务的数量 ```shell $ docker service scale taos_adapter=1 taos_adapter scaled to 1 overall progress: 1 out of 1 tasks 1/1: running [==================================================>] verify: Service converged $ docker service ls -f name=taos_adapter ID NAME MODE REPLICAS IMAGE PORTS 561t4lu6nfw6 taos_adapter replicated 1/1 tdengine/tdengine:2.4.0 ```