README.md

Apache SkyWalking
==========

<img src="http://skywalking.apache.org/assets/logo.svg" alt="Sky Walking logo" height="90px" align="right" />

**SkyWalking**: an APM(application performance monitor) system, especially designed for
microservices, cloud native and container-based (Docker, Kubernetes, Mesos) architectures.

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# Abstract
**SkyWalking** is an open source APM system, including monitoring, tracing, diagnosing capabilities for distributed system
in Cloud Native architecture.
The core features are following.

- Service, service instance, endpoint metrics analysis
- Root cause analysis. Profile the code on the runtime.
- Service topology map analysis
- Service, service instance and endpoint dependency analysis
- Slow services and endpoints detected
- Performance optimization
- Distributed tracing and context propagation
- Database access metrics. Detect slow database access statements(including SQL statements).
- Alarm


<img src="http://skywalking.apache.org/assets/frame.jpeg?u=20190518"/>

SkyWalking supports to collect telemetry (traces and metrics) data from multiple sources
and multiple formats,
including
1. Java, [.NET Core](https://github.com/SkyAPM/SkyAPM-dotnet), [NodeJS](https://github.com/SkyAPM/SkyAPM-nodejs) and [PHP](https://github.com/SkyAPM/SkyAPM-php-sdk) auto-instrument agents in SkyWalking format
1. [Go agent](https://github.com/tetratelabs/go2sky).
1. [LUA agent](https://github.com/apache/skywalking-nginx-lua), especially for Nginx, OpenResty.
1. Envoy gRPC Access Log Service (ALS) format in Istio controlled service mesh. 
1. Istio telemetry format.
1. Envoy Metrics Service format.
1. Zipkin v1/v2 and Jaeger gRPC format with limited topology and metrics analysis.(Experimental)

# Document
[8.x dev](docs/README.md) | [7.0](https://github.com/apache/skywalking/blob/v7.0.0/docs/README.md) | [6.6](https://github.com/apache/skywalking/blob/v6.6.0/docs/README.md), [6.5](https://github.com/apache/skywalking/blob/v6.5.0/docs/README.md).

NOTICE, SkyWalking 8.0+ uses [v3 protocols](docs/en/protocols/README.md). They are incompatible with previous released. 

# Downloads
Please head to the [releases page](http://skywalking.apache.org/downloads/) to download a release of Apache SkyWalking.

# Code of conduct
This project adheres to the Contributor Covenant [code of conduct](CODE_OF_CONDUCT.md). By participating, you are expected to uphold this code.
Please follow the [REPORTING GUIDELINES](CODE_OF_CONDUCT.md#reporting-guidelines) to report unacceptable behavior.

# Live Demo
Host in Beijing. Go to [demo](http://122.112.182.72:8080).

**Video on youtube.com**

[![RocketBot UI](http://img.youtube.com/vi/JC-Anlshqx8/0.jpg)](http://www.youtube.com/watch?v=JC-Anlshqx8)


# Screenshot
<table>
  <tr>
    <td width="100%" align="center" colspan="2"><b>Dashboard</b></td>
  </tr>
  <tr>
    <td><img src="http://skywalking.apache.org/screenshots/6.1.0/dashboard-1.png"/></td>
    <td><img src="http://skywalking.apache.org/screenshots/6.1.0/dashboard-2.png"/></td>
  </tr>
  <tr>
      <td width="50%" align="center"><b>Topology Map</b></td>
      <td width="50%" align="center"><b>Trace</b></td>
  </tr>
  <tr>
     <td><img src="http://skywalking.apache.org/screenshots/6.1.0/topology.png"/></td>
     <td><img src="http://skywalking.apache.org/screenshots/6.1.0/trace.png"/></td>
  </tr>
</table>

# Compiling project
Follow this [document](docs/en/guides/How-to-build.md).

# Contact Us
* Mail list: **dev@skywalking.apache.org**. Mail to `dev-subscribe@skywalking.apache.org`, follow the reply to subscribe the mail list.
* Join `skywalking` channel at [Apache Slack](https://join.slack.com/t/the-asf/shared_invite/enQtNzc2ODE3MjI1MDk1LTAyZGJmNTg1NWZhNmVmOWZjMjA2MGUyOGY4MjE5ZGUwOTQxY2Q3MDBmNTM5YTllNGU4M2QyMzQ4M2U4ZjQ5YmY). If the link is not working, find the latest one at [Apache INFRA WIKI](https://cwiki.apache.org/confluence/display/INFRA/Slack+Guest+Invites).
* Twitter, [ASFSkyWalking](https://twitter.com/ASFSkyWalking)
* QQ Group: 901167865(Recommended), 392443393
* [bilibili B站 视频](https://space.bilibili.com/390683219)

# Who Uses SkyWalking?
Hundreds of companies and organizations use SkyWalking for research, production, and commercial product.

<img src="http://skywalking.apache.org/assets/users-20191216.png"/>

The [PoweredBy](docs/powered-by.md) page includes more users of the project.
Users are encouraged to add themselves to there.

# Landscapes

<p align="center">
<br/><br/>
<img src="https://landscape.cncf.io/images/left-logo.svg" width="150"/>&nbsp;&nbsp;<img src="https://landscape.cncf.io/images/right-logo.svg" width="200"/>
<br/><br/>
SkyWalking enriches the <a href="https://landscape.cncf.io/landscape=observability-and-analysis&license=apache-license-2-0">CNCF CLOUD NATIVE Landscape.

</p>

<p align="center">
<a href="https://openapm.io"><img src="https://openapm.io/static/media/openapm_logo.svg" width="100"/></a>
  <br/>Our project enriches the <a href="https://openapm.io">OpenAPM Landscape!</a>
</p>

# License
[Apache 2.0 License.](/LICENSE)