[root@cache-redis-~/]# cat  /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

   notification_email {

      @qq.com

   }

   notification_email_from @.cn

   smtp_server smtp..cn

   smtp_connect_timeout

   router_id redis_service01

   vrrp_skip_check_adv_addr

   # vrrp_strict  # can not use ping

   vrrp_garp_interval

   vrrp_gna_interval

}

vrrp_script chk_redis {

    script /etc/keepalived/scripts/redis_check.sh   ###监控本地redis alive

    interval                                         ###监控时间间隔（秒）

}

vrrp_instance redis {

    state BACKUP

    interface eth0

    virtual_router_id

    priority

    nopreempt                                        ###不抢占MASTER

    advert_int

    authentication {

        auth_type PASS

        auth_pass

    }

    track_script {

        chk_redis                       ###执行上面定义的chk_redis

     }

    virtual_ipaddress {

        172.16.1.63/24 dev eth0 label eth0:63

    }

    notify_master /etc/keepalived/scripts/redis_master.sh # 当此节点切换为master时执行的脚本

    notify_backup "/etc/keepalived/scripts/redis_backup.sh cache-redis-" # 当此节点切换为
                                                          # backup时执行的脚本

    notify_fault  /etc/keepalived/scripts/redis_fault.sh  # 当此节点故障时（chk_keepalive中

                                                          # 脚本返回非0）执行的脚本

    notify_stop   /etc/keepalived/scripts/redis_stop.sh   # 当此节点keepalived服务stop时执行的脚本

}

[root@cache-redis-~/]# cat /etc/keepalived/keepalived.conf    

! Configuration File for keepalived

global_defs {

   notification_email {

      @qq.com

   }

   notification_email_from @.cn

   smtp_server smtp..cn

   smtp_connect_timeout

   router_id redis_service02

   vrrp_skip_check_adv_addr

   # vrrp_strict  # can not use ping

   vrrp_garp_interval

   vrrp_gna_interval

}

vrrp_script chk_redis {

    script /etc/keepalived/scripts/redis_check.sh   ###监控本地redis alive

    interval                                         ###监控时间间隔（秒）

}

vrrp_instance redis {

    state BACKUP

    interface eth0

    virtual_router_id

    priority 50

    advert_int

    authentication {

        auth_type PASS

        auth_pass

    }

    track_script {

        chk_redis                       ###执行上面定义的chk_redis

    }

    virtual_ipaddress {

        172.16.1.63/24 dev eth0 label eth0:63

    }

    notify_master /etc/keepalived/scripts/redis_master.sh # 当此节点切换为master时执行的脚本

    notify_backup "/etc/keepalived/scripts/redis_backup.sh cache-redis-" # 当此节点切换为
                                                          # backup时执行的脚本

    notify_fault  /etc/keepalived/scripts/redis_fault.sh  # 当此节点故障时（chk_keepalive中
                                                          # 脚本返回非0）执行的脚本

    notify_stop   /etc/keepalived/scripts/redis_stop.sh   # 当此节点keepalived服务stop时执行的脚本

}

mkdir -p /etc/keepalived/scripts

cat >/etc/keepalived/scripts/redis_master.sh<<-EOF

    #!/bin/bash

    PORT="\${1:-6380}"

    REDISCLI="/bin/redis-cli"

    LOGFILE="/var/log/keepalived-redis-state.log"

    sleep 10 #延迟10秒待数据被对方同步完成之后再切换主从角色

    echo -e "[keepalived master]\t\$(date +%F_%T)\nRun SLAVEOF NO ONE cmd ..." >>\${LOGFILE}

    \$REDISCLI -h \$(hostname) -p \${PORT} SLAVEOF NO ONE &>>\${LOGFILE}

EOF

cat >/etc/keepalived/scripts/redis_backup.sh<<-EOF

    #!/bin/bash

    REMOTE_HOSTNAME="\$1"

    PORT="\${2:-6380}"

    REDISCLI="/bin/redis-cli"

    LOGFILE="/var/log/keepalived-redis-state.log"

    sleep 15 #延迟15秒待数据被对方同步完成之后再切换主从角色

    echo -e "[keepalived backup]\t\$(date +%F_%T)\nRun SLAVEOF \${REMOTE_HOSTNAME} \${PORT} ..." >>\${LOGFILE}

    \$REDISCLI -h \$(hostname) -p \${PORT} SLAVEOF \${REMOTE_HOSTNAME} \${PORT} &>>\${LOGFILE}

EOF

cat >/etc/keepalived/scripts/redis_check.sh<<-EOF

    #!/bin/bash

    PORT="\${1:-6380}"

    LOGFILE=/var/log/keepalived-redis-state.log

    ALIVE=\$(/bin/redis-cli -h \$(hostname) -p \${PORT} PING)

    if [ "\$ALIVE" == "PONG" ]; then

        exit 0

    else

        echo -e "[redis_check fault]\t\$(date +%F_%T)" >> \$LOGFILE

        exit 1

    fi

EOF

cat >/etc/keepalived/scripts/redis_fault.sh<<-EOF

    #!/bin/bash

    systemctl stop keepalived.service

EOF

cat >/etc/keepalived/scripts/redis_stop.sh<<-EOF

    #!/bin/bash

    LOGFILE=/var/log/keepalived-redis-state.log

    echo -e "[keepalived stop]\t\$(date +%F_%T)" >> \$LOGFILE

EOF

chmod +x /etc/keepalived/scripts/*.sh