emqx/README.md

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# EMQ X Broker
[![GitHub Release](https://img.shields.io/github/release/emqx/emqx?color=brightgreen&label=Release)](https://github.com/emqx/emqx/releases)
[![Build Status](https://img.shields.io/travis/emqx/emqx?label=Build)](https://travis-ci.org/emqx/emqx)
[![Coverage Status](https://img.shields.io/coveralls/github/emqx/emqx/master?label=Coverage)](https://coveralls.io/github/emqx/emqx?branch=master)
[![Docker Pulls](https://img.shields.io/docker/pulls/emqx/emqx?label=Docker%20Pulls)](https://hub.docker.com/r/emqx/emqx)
[![Slack](https://img.shields.io/badge/Slack-EMQ%20X-39AE85?logo=slack)](https://slack-invite.emqx.io/)
[![Discord](https://img.shields.io/discord/931086341838622751?label=Discord&logo=discord)](https://discord.gg/xYGf3fQnES)
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[![YouTube](https://img.shields.io/badge/Subscribe-EMQ-FF0000?logo=youtube)](https://www.youtube.com/channel/UC5FjR77ErAxvZENEWzQaO5Q)
[![The best IoT MQTT open source team looks forward to your joining](https://static.emqx.net/images/github_readme_en_bg.png)](https://www.emqx.com/en/careers)
English | [简体中文](./README-CN.md) | [日本語](./README-JP.md) | [русский](./README-RU.md)
*EMQ X* broker is a fully open source, highly scalable, highly available distributed MQTT messaging broker for IoT, M2M and Mobile applications that can handle tens of millions of concurrent clients.
Starting from 3.0 release, *EMQ X* broker fully supports MQTT V5.0 protocol specifications and backward compatible with MQTT V3.1 and V3.1.1, as well as other communication protocols such as MQTT-SN, CoAP, LwM2M, WebSocket and STOMP. The 3.0 release of the *EMQ X* broker can scale to 10+ million concurrent MQTT connections on one cluster.
- For full list of new features, please read [EMQ X Release Notes](https://github.com/emqx/emqx/releases).
- For more information, please visit [EMQ X homepage](https://www.emqx.io/).
## Installation
The *EMQ X* broker is cross-platform, which supports Linux, Unix, macOS and Windows. It means *EMQ X* can be deployed on x86_64 architecture servers and ARM devices like Raspberry Pi.
See more details for building and running *EMQ X* on Windows in [Windows.md](./Windows.md)
#### Installing via EMQ X Docker Image
```
docker run -d --name emqx -p 1883:1883 -p 8081:8081 -p 8083:8083 -p 8883:8883 -p 8084:8084 -p 18083:18083 emqx/emqx
```
#### Installing via Binary Package
Get the binary package of the corresponding OS from [EMQ X Download](https://www.emqx.com/en/downloads) page.
- [Single Node Install](https://docs.emqx.io/en/broker/latest/getting-started/install.html)
- [Multi Node Install](https://docs.emqx.io/en/broker/latest/advanced/cluster.html)
## Build From Source
The *EMQ X* broker requires Erlang/OTP R21+ to build since 3.0 release.
For 4.3 and later versions.
```bash
git clone https://github.com/emqx/emqx.git
cd emqx
make
_build/emqx/rel/emqx/bin/emqx console
```
For earlier versions, release has to be built from another repo.
```bash
git clone https://github.com/emqx/emqx-rel.git
cd emqx-rel
make
_build/emqx/rel/emqx/bin/emqx console
```
## Quick Start
If emqx is built from source, `cd _build/emqx/rel/emqx`.
Or change to the installation root directory if emqx is installed from a release package.
```bash
# Start emqx
./bin/emqx start
# Check Status
./bin/emqx_ctl status
# Stop emqx
./bin/emqx stop
```
To view the dashboard after running, use your browser to open: http://localhost:18083
## Test
### To test everything in one go
```
make eunit ct
```
### To run subset of the common tests
Examples
```bash
make apps/emqx_retainer-ct
```
### Dialyzer
##### To Analyze all the apps
```
make dialyzer
```
##### To Analyse specific apps, (list of comma separated apps)
```
DIALYZER_ANALYSE_APP=emqx_lwm2m,emqx_authz make dialyzer
```
## Community
### FAQ
Visiting [EMQ X FAQ](https://docs.emqx.io/en/broker/latest/faq/faq.html) to get help of common problems.
### Questions
[GitHub Discussions](https://github.com/emqx/emqx/discussions) is where you can ask questions, and share ideas.
### Proposals
For more organised improvement proposals, you can send pull requests to [EIP](https://github.com/emqx/eip).
### Plugin development
See [PLUGIN.md](./PLUGIN.md)
## MQTT Specifications
You can read the mqtt protocol via the following links:
[MQTT Version 3.1.1](https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html)
[MQTT Version 5.0](https://docs.oasis-open.org/mqtt/mqtt/v5.0/cs02/mqtt-v5.0-cs02.html)
[MQTT SN](https://www.oasis-open.org/committees/download.php/66091/MQTT-SN_spec_v1.2.pdf)
## License
See [LICENSE](./LICENSE).