安装
yum install lksctp-tools
yum install http://emqtt.com/downloads/latest/centos7-rpm
systemctl enable emqttd
pkill -9 epmd
service emqttd start
密码
web访问：http://10.200.77.41:18083
默认账号密码：admin/public
设置web访问账户：
emqttd_ctl admins del admin
emqttd_ctl admins add fungaming jh374SDYU
emqttd tcp 用户名密码认证
vi /etc/emqttd/emq.conf
mqtt.allow_anonymous = false
emqttd_ctl plugins load emq_auth_username
emqttd_ctl users add <Username> <Password>
TCP请求端口1883
