MySQL+Keepalived实现主主高可用方案

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             |

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