Mysql主主高可用方案

master配置

[root@master ~]# yum -y install keepalived

[root@master ~]# vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

**router_id LVS_**MASTER-A

}

vrry_script mysql {

script "/opt/mysql.sh"

interval 2

weight -5

fall 2

rise 1

}

vrrp_instance VI_1 {

state MASTER

interface ens33

virtual_router_id 51

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

track_script {

mysql

}

virtual_ipaddress {

192.168.200.210

}

}

}

[root@master ~]# vim /opt/mysql.sh

#!/bin/bash

counter=$(netstat -na |grep "LISTEN" |grep "3306" |wc -l)

if [ "${counter}" -eq 0 ]

then

systemctl stop keepalived

fi

~

[root@master ~]# chmod +x /opt/mysql.sh

[root@master ~]# systemctl start keepalived

2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

inet 192.168.30.25/24 brd 192.168.30.255 scope global noprefixroute ens33

inet 192.168.200.210/32 scope global ens33

[root@master ~]# tail -f /var/log/messages

Apr  9 15:36:43 master ntpd_intres[3721]: host name not found: 0.centos.pool.ntp.org

Apr  9 15:36:43 master ntpd_intres[3721]: host name not found: 1.centos.pool.ntp.org

Apr  9 15:36:43 master ntpd_intres[3721]: host name not found: 2.centos.pool.ntp.org

Apr  9 15:36:43 master ntpd_intres[3721]: host name not found: 3.centos.pool.ntp.org

Apr  9 15:36:45 master Keepalived_vrrp[9706]: Sending gratuitous ARP on ens33 for 192.168.200.210

Apr  9 15:36:45 master Keepalived_vrrp[9706]: VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.200.210

Apr  9 15:36:45 master Keepalived_vrrp[9706]: Sending gratuitous ARP on ens33 for 192.168.200.210

Apr  9 15:36:45 master Keepalived_vrrp[9706]: Sending gratuitous ARP on ens33 for 192.168.200.210

Apr  9 15:36:45 master Keepalived_vrrp[9706]: Sending gratuitous ARP on ens33 for 192.168.200.210

Apr  9 15:36:45 master Keepalived_vrrp[9706]: Sending gratuitous ARP on ens33 for 192.168.200.210

Apr  9 15:40:01 master systemd: Started Session 40 of user root.

Apr  9 15:40:01 master systemd: Starting Session 40 of user root.

第二台master2从

[root@master1 ~]# yum -y install keepalived

[root@master1 ~]# vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

**router_id LVS_**MASTER-B

}

vrry_script mysql {

script "/opt/mysql.sh"

interval 2

weight -5

fall 2

rise 1

}

vrrp_instance VI_1 {

state BACKUP

interface ens33

virtual_router_id 51

priority 90

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

track_script {

mysql

}

virtual_ipaddress {

192.168.200.210

}

}

}

测试VIP转移

[root@master1 ~]# vim /opt/mysql.sh

#!/bin/bash

counter=$(netstat -na |grep "LISTEN"|grep "3306" |wc -l)

if [ "${counter}" -eq 0 ]

then

systemctl stop keepalived

fi

[root@master1 ~]# chmod +x /opt/mysql.sh

[root@master1 ~]# systemctl start keepalived

[root@master1 ~]# tail -f /var/log/messages

[root@master ~]# systemctl stop mariadb

[root@master ~]# ip a |grep ens33

[root@localhost ~]# ip a |grep ens33

2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

inet 192.168.30.25/24 brd 192.168.30.255 scope global noprefixroute ens33

2,在远程客户端 测试

Mysql 服务器授权

[root@localhost ~]# mysql -uroot

MariaDB [(none)]> grant all on *.* to 'root'@'192.168.30.%'identified by '123456';

MariaDB [(none)]> flush privileges;

通过vip 登陆测试

[root@localhost ~]# mysql -uroot -p123456 -h 192.168.30.210;

MariaDB [(none)]> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| sampdb             |

| test               |

| test01             |

| test02             |

+--------------------+