[[email protected]01~/]# cat  /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
   notification_email {
      11270963592@qq.com
   }
   notification_email_from 18978038798@189.cn
   smtp_server smtp.189.cn
   smtp_connect_timeout 
 
30
   router_id redis_service01
   vrrp_skip_check_adv_addr
   # vrrp_strict  # can not use ping 
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}
vrrp_script chk_redis { 
    script "/etc/keepalived/scripts/redis_check.sh"   ###監控指令碼 
    interval 2                                        ###監控時間 
} 
vrrp_instance redis {
    state BACKUP
    
 
interface eth0
    virtual_router_id 55
    priority 100
    nopreempt
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
        chk_redis                       ###執行上面定義的chk_redis
     }
    virtual_ipaddress {
        172.16.1.63/24
    }
    notify_master 
 
/etc/keepalived/scripts/redis_master.sh
    notify_backup /etc/keepalived/scripts/redis_backup.sh
    notify_fault  /etc/keepalived/scripts/redis_fault.sh
    notify_stop   /etc/keepalived/scripts/redis_stop.sh 
}

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 1 #延遲10秒待資料被對方同步完成之後再切換主從角色
    echo -e "[keepalived master]\n\$(date +%F_%T)\nRun SLAVEOF NO ONE cmd ...\n" >>\${LOGFILE}
    \$REDISCLI -h \$(hostname) -p \${PORT} SLAVEOF NO ONE &>>\${LOGFILE}
EOF

cat >/etc/keepalived/scripts/redis_backup.sh<<-EOF
    #!/bin/bash
    REMOTE_HOSTNAME="\${1:-cache-redis-02}"
    PORT="\${2:-6380}"
    REDISCLI="/bin/redis-cli"
    LOGFILE="/var/log/keepalived-redis-state.log"
    sleep 5 #延遲15秒待資料被對方同步完成之後再切換主從角色
    echo -e "[keepalived backup]\n\$(date +%F_%T)\nRun SLAVEOF cmd ...\n" >>\${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)\n" >> \$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)\n" >> \$LOGFILE
EOF

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

[[email protected]02~/]# cat /etc/keepalived/keepalived.conf    

! Configuration File for keepalived
global_defs {
   notification_email {
      11270963592@qq.com
   }
   notification_email_from 18978038798@189.cn
   smtp_server smtp.189.cn
   smtp_connect_timeout 30
   router_id redis_service02
   vrrp_skip_check_adv_addr
   # vrrp_strict  # can not use ping 
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}
vrrp_script chk_redis {
    script "/etc/keepalived/scripts/redis_check.sh"   ###監控指令碼
    interval 2                                        ###監控時間
}
vrrp_instance redis {
    state BACKUP
    interface eth0
    virtual_router_id 55
    priority 50
    
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script { 
        chk_redis                       ###執行上面定義的chk_redis
    } 
    virtual_ipaddress {
        172.16.1.63/24
    }
    notify_master /etc/keepalived/scripts/redis_master.sh 
    notify_backup /etc/keepalived/scripts/redis_backup.sh
    notify_fault  /etc/keepalived/scripts/redis_fault.sh
    notify_stop   /etc/keepalived/scripts/redis_stop.sh 
}

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 1 #延遲10秒待資料被對方同步完成之後再切換主從角色
    echo -e "[keepalived master]\n\$(date +%F_%T)\nRun SLAVEOF NO ONE cmd ...\n" >>\${LOGFILE}
    \$REDISCLI -h \$(hostname) -p \${PORT} SLAVEOF NO ONE &>>\${LOGFILE}
EOF

cat >/etc/keepalived/scripts/redis_backup.sh<<-EOF
    #!/bin/bash
    REMOTE_HOSTNAME="\${1:-cache-redis-01}"
    PORT="\${2:-6380}"
    REDISCLI="/bin/redis-cli"
    LOGFILE="/var/log/keepalived-redis-state.log"
    sleep 5 #延遲15秒待資料被對方同步完成之後再切換主從角色
    echo -e "[keepalived backup]\n\$(date +%F_%T)\nRun SLAVEOF cmd ...\n" >>\${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)\n" >> \$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)\n" >> \$LOGFILE
EOF

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