EMQ安装与部属
1.下载EMQ安装包
访问EMQ官网下载地址：
$ https://www.emqx.cn/downloads/broker/v4.2.7/emqx-centos7-4.2.7-x86_64.rpm
#1.上传到指定的文件夹/usr/local/
#2.安装
rpm -ivh openssl-libs-1.0.2k-21.el7_9.x86_64.rpm --force
rpm -ivh erlang-22.0.7-1.el7.x86_64.rpm
rpm -ivh emqx-centos7-4.2.7-x86_64.rpm
#3.运行
sudo emqx start
#关闭防火墙
systemctl disable firewalld
systemctl stop firewalld.service
#单节点的登录
192.168.86.162:18083
admin public
2.集群部署
| 机器名 | IP | 作用 |
|---|---|---|
| emq1 | 192.168.86.161 | 代理机器 |
| emq2 | 192.168.86.162 | 节点1 |
| emq3 | 192.168.86.163 | 节点2 |
| emq4 | 192.168.86.164 | 节点3 |
#手动添加节点配置方式
#编辑每个节点的配置文件
vim etc/emqx/emqx.conf
#修改各自节点名称呼 集群名@IP
cluster,name = emqx
node.name = emqx@192.168.86.162
#重新启动节点
#然后将附属节点添加到集群中去
#在192.168.86.162上
emqx_ctl cluster join emqx@192.168.86.163
#在164上
emqx_ctl cluster join emqx@192.168.86.162
#或者
emqx_ctl cluster join emqx@192.168.86.162
# 自动添加节点的配置方式
## 修改节点名 #修改各自节点名称呼 集群名@IP
node.name = emqx@192.168.86.162
## 修改集群策略为static，无需手动添加节点了
cluster.discovery = static
## 所有集群节点
cluster.static.seeds = emqx@192.168.86.162, emqx@192.168.86.163， @emqx192.168.86.164
## 为了获取 IP 地址，需要设置 proxy_protocol
listener.tcp.external.proxy_protocol = on
挂载机器的yum源
mkdir /mnt/cdrom
#挂载命令
mount /dev/sr0 /mnt/cdrom/
#编辑yum配置文件
cat >> /etc/yum.repos.d/CentOS-Media.repo <<EOF
#添加如下内容
[local]
name=local
baseurl=file:///mnt/cdrom
gpgcheck=0
enable=1
EOF
#将默认的yum源配置文件改名 使其失效
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.back
yum makecache
#通过yum安装 haproxy
yum -y install haproxy
#查看详细信息
rpm -qi haproxy
#修改配置文件
vim /etc/haproxy/haproxy.cfg
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
# chroot /usr/sbin/haproxy
pidfile /var/run/haproxy.pid
maxconn 1000000
user root
group root
daemon
# turn on stats unix socket
# stats socket /var/lib/haproxy/stats
# stats socket /usr/sbin/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
log global
option dontlognull
option http-server-close
# option forwardfor
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 60s
timeout client 2m
timeout server 2m
timeout http-keep-alive 10s
timeout check 10s
frontend emqtt-front
bind *:1883
maxconn 1000000
mode tcp
default_backend emqtt-backend
backend emqtt-backend
balance roundrobin
# balance source
server emq2 192.168.86.162:1883 check check inter 100000 fall 2 rise 5 weight 1
server emq3 192.168.86.163:1883 check check inter 100000 fall 2 rise 5 weight 1
server emq4 192.168.86.164:1883 check check inter 100000 fall 2 rise 5 weight 1
# source 0.0.0.0 usesrc clientip
frontend emqtt-admin-front
bind *:18083
mode http
default_backend emqtt-admin-backend
backend emqtt-admin-backend
mode http
balance roundrobin
server emq2 192.168.86.162:18083 check
server emq3 192.168.86.163:18083 check
server emq4 192.168.86.164:18083 check
listen admin_stats
stats enable
bind *:8080
mode http
option httplog
log global
maxconn 10
stats refresh 30s
stats uri /admin
stats realm haproxy
stats auth admin:admin
stats hide-version
stats admin if TRUE
#指定配置文件
haproxy -f /etc/haproxy/haproxy.cfg -c
#检查配置文件格式
haproxy -c -f /etc/haproxy/haproxy.cfg
#启动haproxy
haproxy -f /etc/haproxy/haproxy.cfg
#查看状态
service haproxy status
#添加开机自启动
cat <<eof>>/etc/rc.d/rc.local
haproxy -f /etc/haproxy/haproxy.cfg
eof
vim /etc/sysctl.conf #修改内核参数
net.ipv4.ip_nonlocal_bind = 1 #没有就新增此条记录
#访问高性能负载界面
192.168.86.161：8080/admin
#账户 admin 密码 admin