Mysq+Haproxy+Keepalived高可用
时间:2022-07-24
本文章向大家介绍Mysq+Haproxy+Keepalived高可用,主要内容包括其使用实例、应用技巧、基本知识点总结和需要注意事项,具有一定的参考价值,需要的朋友可以参考一下。
实验环境
全部关闭防火墙和selinux
双主模式的数据库
centos7.3
VIP地址 172.16.0.100
master 172.16.0.10
backup 172.16.0.8
mysqla 172.16.0.4
mysqlb 172.16.0.5
环境准备
全部服务器都需要执行以下
systemctl stop firewalld
setenforce 0
vim /etc/hosts
172.16.0.10 master
172.16.0.8 backup
172.16.0.4 mysqla
172.16.0.5 mysqlb
安装Haproxy
master:
[root@master /]# yum -y install haproxy
[root@master /]# cp -rf /etc/haproxy/haproxy.cfg{,.bak}
[root@master /]# vim /etc/haproxy/haproxy.cfg
global
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
stats socket /var/lib/haproxy/stats
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
frontend mysql
mode tcp
bind *:6039
default_backend back_mysql
backend back_mysql
mode tcp
balance roundrobin
server mysqla 172.16.0.4:3306 check
server mysqlb 172.16.0.5:3306 check
backup:
[root@backup /]# yum -y install haproxy
[root@backup /]# cp -rf /etc/haproxy/haproxy.cfg{,.bak}
[root@backup /]# vim /etc/haproxy/haproxy.cfg
global
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
stats socket /var/lib/haproxy/stats
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
frontend mysql
mode tcp
bind *:6039
default_backend back_mysql
backend back_mysql
mode tcp
balance roundrobin
server mysqla 172.16.0.4:3306 check
server mysqlb 172.16.0.5:3306 check
3:安装keepalived 1>安装keepalived
[root@master /]# yum install -y keepalived
[root@backup /]# yum install -y keepalived
编辑配置文件
master:
[root@master /]# cp /etc/keepalived/keepalived.conf{,.bak}
[root@master /]# vim /etc/keepalived/keepalived.conf
global_defs {
router_id directory1
}
vrrp_script check_haproxy {
script "/etc/keepalived/check_haproxy_status.sh"
interval 5 #每5秒执行一次
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 80
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.0.100/24
}
track_script {
check_haproxy
}
}
backup:
[root@backup /]# cp /etc/keepalived/keepalived.conf{,.bak}
[root@backup /]# vim /etc/keepalived/keepalived.conf
global_defs {
router_id directory2
}
vrrp_script check_haproxy {
script "/etc/keepalived/check_haproxy_status.sh"
interval 5 #每5秒执行一次
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 80
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.0.100/24
}
track_script {
check_haproxy
}
}
编辑脚本
master:
vim /etc/keepalived/check_haproxy_status.sh
#!/bin/bash
/usr/bin/curl -I http://localhost &>/dev/null
if [ $? -ne 0 ];then
# /etc/init.d/keepalived stop
systemctl stop keepalived
fi
backup:
vim /etc/keepalived/check_haproxy_status.sh
#!/bin/bash
/usr/bin/curl -I http://localhost &>/dev/null
if [ $? -ne 0 ];then
# /etc/init.d/keepalived stop
systemctl stop keepalived
fi
测试
在master和backup上面启动haproxy和keepalived
master:
[root@master /]# systemctl start haproxy
[root@master /]# systemctl start keepalived
backup:
[root@backup /]# systemctl start haproxy
[root@backup /]# systemctl start keepalived
查看VIP IP绑定成功了没
[root@master /]# ip add |grep 172.16.0.
inet 172.16.0.10/24 brd 172.16.0.255 scope global dynamic ens33
inet 172.16.0.100/24 scope global secondary ens33
[root@backup /]# ip add |grep 172.16.0.
inet 172.16.0.8/24 brd 172.16.0.255 scope global dynamic ens33
连接mysql数据库
在连接数据库的时候需要使用VI+haproxy_PORT,上面我们配置haproxy监听了6039端口,那么连接的时候就是用VIP+6039端口。
连接成功
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