Redis + keepalived 高可用行配置检测脚本

Redis 在生产配置中；除redis集群、哨兵模式之外；主从模式还是比较普遍的。

配置 redis 多主从；由 keepalived 做 VIP 地址漂移。可以实现redis的高可用性。

keepalived 配置示例；（master 主节点配置，backup根据更改就可以了。）

! Configuration File for keepalived
global_defs {
   router_id redis1
}

vrrp_script chk_redis
{
     script "/etc/keepalived/scripts/redis_check.sh"
     interval
     timeout
     fall
     rise
}

vrrp_instance redis {
     state MASTER
     interface eth0
     virtual_router_id
     priority
     advert_int
         authentication {
         auth_type PASS
         auth_pass
    }
    virtual_ipaddress {
                 172.16.2.36/
    }
    track_script {
         chk_redis
    }
     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"
}

Redis 状态检测脚本。

redis_check  Redis 状态检测；

#!/bin/bash
ports=(6379 6389 6399)
port_num=${#ports[@]}
pong_num=
LOGFILE="/opt/keepalived/keepalived-redis-check.log"
echo '-----------------' >> $LOGFILE

for port in ${ports[*]}
do
    if [ $port -eq  ] ;then
        ALIVE=`/usr/bin/redis-cli -p $port -h 172.16.2.56 -a tkfJfnMjvniitHDG PING`
    else
        ALIVE=`/usr/bin/redis-cli -p $port -h 172.16.2.56 -a ffdca1b6f2d4c6d4  PING`
    fi
    echo "[CHECK]" >> $LOGFILE
    date >> $LOGFILE
    if [ "$ALIVE" == "PONG" ];then
        pong_num=$[$pong_num+]
        echo "Success: redis-cli -p $port PING $ALIVE" >> $LOGFILE >&
    else
        echo "Failed:redis-cli -p $port PING $ALIVE " >> $LOGFILE >&
    fi
done

if [ $port_num -eq $pong_num ];then
    echo "check is ok" >> $LOGFILE
    exit
else
    echo "check is error" >> $LOGFILE
    exit
fi

master 检测；

#!/bin/bash
ports=(  )
port_num=${#ports[@]}
LOGFILE="/opt/keepalived/keepalived-redis-state.log"
echo '-------------' >> $LOGFILE
for port in ${ports[*]}
do
    echo "[master]" >> $LOGFILE
    date >> $LOGFILE
    echo "Being master...." >> $LOGFILE >&
    echo "Run MASTER cmd ..." >> $LOGFILE >&
    echo "Run -p $port SLAVEOF NO ONE cmd ..." >> $LOGFILE
    if [ $port -eq  ];then
        /usr/bin/redis-cli -h 172.16.2.56 -a  -p $port slaveof no one >> $LOGFILE >&
    else
        /usr/bin/redis-cli -h 172.16.2.56 -a  -p $port slaveof no one >> $LOGFILE >&
    fi
done

backup 检测；

#!/bin/bash
ports=(  )
port_num=${#ports[@]}
LOGFILE="/opt/keepalived/keepalived-redis-state.log"
other_ip="172.16.2.57"
echo '----------------' >> $LOGFILE
for port in ${ports[*]}
do
    echo "[backup]" >> $LOGFILE
    date >> $LOGFILE
    echo "Being backup...." >> $LOGFILE >&
    echo "Run BACKUP cmd ..." >> $LOGFILE >&
    echo "Run -p $port SLAVEOF $other_ip cmd ..." >> $LOGFILE
    if [ $port -eq  ];then
        /usr/bin/redis-cli -h 172.16.2.56 -p $port -a  slaveof $other_ip $port >> $LOGFILE >&
    else
        /usr/bin/redis-cli -h 172.16.2.56 -p $port -a  slaveof $other_ip $port >> $LOGFILE >&
    fi
done

redis_fault  服务错误检测；

#!/bin/bash
LOGFILE=/opt/keepalived/keepalived-redis-state.log
echo "[fault]" >> $LOGFILE
date >> $LOGFILE

redis 服务停止检测；

#!/bin/bash
LOGFILE=/opt/keepalived/keepalived-redis-state.log
echo "[stop]" >> $LOGFILE
date >> $LOGFILE