1、背景

节点1：192.168.12.35

节点2：192.168.12.36

2、keepalived安装

使用yum仓库安装keepalived

[root@node01 ~]# yum install -y keepalived

[root@node02 ~]# yum install -y keepalived

安装完成后会在/etc文件夹路径下生成keepalived的配置文件

/etc/keepalived/keepalived.conf

3、修改配置文件

节点一：

[root@node01 ~]# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

   router_id node01

   vrrp_skip_check_adv_addr

   vrrp_strict

   vrrp_garp_interval 0

   vrrp_gna_interval 0

}

vrrp_instance VI_1 {

    state MASTER

    interface ens32

    virtual_router_id 51

    priority 100

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        192.168.12.38/24

    }

}

virtual_server 192.168.12.38 3306 {

    delay_loop 6

    lb_algo rr

    lb_kind NAT

    persistence_timeout 50

    protocol TCP

    real_server 192.168.12.35 3306 {

        weight 1

                notify_down /root/kill_keepalived.sh

        TCP_CHECK {

            connect_timeout 3

            connect_port 3306

        }

    }

    real_server 192.168.12.36 3306 {

        weight 1

        TCP_CHECK {

            connect_timeout 3

            connect_port 3306

        }

    }

}

节点二：

[root@node02 ~]# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

   router_id node02

   vrrp_skip_check_adv_addr

   vrrp_strict

   vrrp_garp_interval 0

   vrrp_gna_interval 0

}

vrrp_instance VI_1 {

    state BACKUP

    interface ens32

    virtual_router_id 51

    priority 99

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        192.168.12.38/24

    }

}

virtual_server 192.168.12.38 3306 {

    delay_loop 6

    lb_algo rr

    lb_kind NAT

    persistence_timeout 50

    protocol TCP

    real_server 192.168.12.35 3306 {

        weight 1

        TCP_CHECK {

            connect_timeout 3

            connect_port 3306

        }

    }

    real_server 192.168.12.36 3306 {

        weight 1

        TCP_CHECK {

            connect_timeout 3

            connect_port 3306

        }

    }

}

4、开启keepalived自启动

[root@node01 ~]# systemctl enable keepalived

[root@node02 ~]# systemctl enable keepalived

节点一执行脚本/root/kill_keepalived.sh

[root@node01 ~]# cat /root/kill_keepalived.sh

#!/bin/bash

systemctl stop keepalived