Centos7.2 搭建emqttd集群，添加自启动服务

关闭防火墙（可选）：

systemctl stop firewalld.service

1.安装依赖库

> sudo yum -y install make gcc gcc-c++ kernel-devel m4 ncurses-devel openssl-devel

2.获取源码包

> wget http://www.erlang.org/download/otp_src_R13B04.tar.gz

3.解压、编译、安装

> tar xfvz otp_src_R13B04.tar.gz

> cd otp_src_R13B04/

> ./configure --with-ssl

> make install

4.可能遇到的错误

http://blog.csdn.net/laughing_cui/article/details/53322790

5.emqttd程序包下载

Debian http://emqtt.com/downloads/latest/debian

Ubuntu http://emqtt.com/downloads/latest/ubuntu

CentOS http://emqtt.com/downloads/latest/centos

FreeBSD http://emqtt.com/downloads/latest/freebsd

Mac OS X http://emqtt.com/downloads/latest/macosx

Windows http://emqtt.com/downloads/latest/windows

6.Linux服务器安装（以Centos为例）

wget http://emqtt.com/docs/v2/install.html#linux

1、解压缩包（可以官网下载）

> unzip emqttd-centos64-1.1-beta-20160601.zip

2、控制台调试模式启动，检查emqttd是否可正常启动:

> vim /opt/emqttd/etc/emq.conf

修改node.name = emqttd@172.30.60.3

> cd /opt/emqttd

> ./bin/emqttd console

emqttd消息服务器如启动正常，控制台输出:

starting emqttd on node 'emqttd@127.0.0.1'

emqttd ctl is starting...[done]

emqttd trace is starting...[done]

emqttd pubsub is starting...[done]

emqttd stats is starting...[done]

emqttd metrics is starting...[done]

emqttd retainer is starting...[done]

emqttd pooler is starting...[done]

emqttd client manager is starting...[done]

emqttd session manager is starting...[done]

emqttd session supervisor is starting...[done]

emqttd broker is starting...[done]

emqttd alarm is starting...[done]

emqttd mod supervisor is starting...[done]

emqttd bridge supervisor is starting...[done]

emqttd access control is starting...[done]

emqttd system monitor is starting...[done]

http listen on 0.0.0.0:18083 with 4 acceptors.

mqtt listen on 0.0.0.0:1883 with 16 acceptors.

mqtts listen on 0.0.0.0:8883 with 4 acceptors.

http listen on 0.0.0.0:8083 with 4 acceptors.

Erlang MQTT Broker 1.1 is running now

Eshell V6.4 (abort with ^G)

(emqttd@127.0.0.1)1>

CTRL+c关闭控制台。守护进程模式启动:

> ./bin/emqttd start

emqttd消息服务器进程状态查询:

> ./bin/emqttd_ctl status

正常运行状态，查询命令返回:

Node 'emqttd@127.0.0.1' is started

emqttd 1.1 is running

部署好EMQ之后，访问URL地址：http://172.30.60.3:18083 ，缺省用户名/密码: admin/public

停止服务器:

> ./bin/emqttd stop

节点加入集群（有两种集群添加方式：IP（推荐）和主机域名）：

主机域名举例：

首先修改主机名，加入主机名.域名

vim /etc/hosts

例如：

127.0.0.1 s1 s1.emqtt.io

172.30.60.30 s1 s1.emqtt.io（第一台）

172.30.60.37 s2 s2.emqtt.io（第二台）

172.30.60.22 s3 s3.emqtt.io（第三台）

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4

::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

然后修改配置文件emq.conf

node.name=emq@主机名.域名

然后启动emqttd

emqttd>bin/emqttd start

最后节点加入集群

emqttd>./bin/emqttd_ctl cluster join emqttd@s1.emqtt.io

查看集群状态

emqttd>./bin/emqttd_ctl cluster status

节点退出集群：

./bin/emqttd_ctl cluster leave

或emqttd@s1.emqtt.io节点上，从集群删除emqttd@s2.emqtt.io节点:

./bin/emqttd_ctl cluster remove emqttd@s2.emqtt.io

emqttd开机自启动：

在此目录下面新建文件emqttd.service

vim /usr/lib/systemd/system/emqttd.service

加入配置文件

[Unit]

Description=emqttdapi

After=network.target

[Service]

Type=forking

Environment=HOME=/opt/emqttd

ExecStart=/opt/emqttd/bin/emqttd start

ExecReload=/opt/emqttd/bin/emqttd reboot

ExecStop=/opt/emqttd/bin/emqttd stop

PrivateTmp=true

[Install]

WantedBy=multi-user.target

最后执行命令

systemctl enable emqttd.service

集群间需要开端口：监听端口、配置文件emq.conf里面的端口区间、4369端口

（可参考官方文档）