keepalived和redis主从方案

实现切换逻辑：

redis 主和 redis从  正常同步；

redis主keepalived 启动，执行redis_master.sh脚本，vip在自己身上；

redis 从keepalived 启动，执行redis_slave.sh脚本；

redis主服务关闭，则redis主执行redis_fault.sh脚本， vip落在redis 从上，redis从执行redis_master.sh脚本，变成主；

redis主服务开启，则redis主执行redis_slave.sh脚本变成从，vip还在redis 从上，还是主；

redis从服务关闭，则redis从执行redis_fault.sh脚本， vip落在redis主上，redis主执行redis_master.sh脚本，变成主；

redis从服务开启，则redis从执行redis_slave.sh脚本变成从， vip还在redis主上，redis主继续做主

具体配置：

主服务器IP：172.188.1.2，从服务器IP：172.188.1.3，172.188.1.1 vip服务器

主从服务器都安装keepalived和redis

修改从服务器 redis.conf配置文件

slaveof 192.168.1.235 6379

主服务器keepalived配置文件

global_defs {

   router_id  LVS_DEVEL

}

vrrp_script chk_redis {

    script "/etc/keepalived/scripts/redis_check.sh"

    interval 1

}

vrrp_instance mes_Redis {

    state MASTER

    interface eth0

    garp_master_delay 10

    smtp_alert

    virtual_router_id 3

    priority 100

    nopreempt

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        172.188.1.1

    }

    track_script {

        chk_redis

    }

    notify_master /etc/keepalived/scripts/redis_master.sh

    notify_backup /etc/keepalived/scripts/redis_slave.sh

    notify_fault  /etc/keepalived/scripts/redis_fault.sh

    notify_stop   /etc/keepalived/scripts/redis_stop.sh

}

从服务器keepalived配置文件

global_defs {
router_id  LVS_DEVEL

}

vrrp_script chk_redis {

    script "/etc/keepalived/scripts/redis_check.sh"

    interval 1

}

vrrp_instance mes_Redis {

    state BACKUP

    interface eth0

    garp_master_delay 10

    smtp_alert

    virtual_router_id 3

    priority 90

    nopreempt

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        172.188.1.1

    }

    track_script {

        chk_redis

    }

    notify_master /etc/keepalived/scripts/redis_master.sh

    notify_backup /etc/keepalived/scripts/redis_slave.sh

    notify_fault  /etc/keepalived/scripts/redis_fault.sh

    notify_stop   /etc/keepalived/scripts/redis_stop.sh

}·