Redis 主从 keepalived高可用 实现 VIP 自动漂移

Redis 多主写多从度 配置启动OK ；直接配 keepalived  相关配置；

redis
默认路径 ：/usr/local/redis 

keepalived
默认路径 ：/etc/keepalived

检测监控 redis_backup.sh,redis_check.sh,redis_fault.sh redis_master.sh,redis_stop.sh脚本默认 /etc/keepalived/script

实现VIP 地址检测漂移；VRRP 组播地址是必须要通信的 ；

iptables 设置添加 需要开放的端口和地址
224.0.0.18 是vrrp组播地址 ；
iptables -A INPUT -d 224.0.0.18 -j ACCEPT

Master - redis  主节点1  keepalived.conf  配置：

global_defs {
   router_id redis1
}
vrrp_script chk_redis
{
     script "/etc/keepalived/scripts/redis_check.sh 127.0.0.1 6379"
     interval
     timeout
     fall
}

vrrp_instance redis {
     state MASTER
     interface bond0
     virtual_router_id
     priority
     nopreempt # no seize,must add
     advert_int
         authentication {   #all node must same
         auth_type PASS
         auth_pass
    }   

    virtual_ipaddress {
                 1.2.3.4/
    }
    track_script {
         chk_redis
    } 

     notify_master "/etc/keepalived/scripts/redis_master.sh 127.0.0.1  1.2.3.1 6379"
     notify_backup "/etc/keepalived/scripts/redis_backup.sh 127.0.0.1  1.2.3.1 6379"
     notify_fault /etc/keepalived/scripts/redis_fault.sh
     notify_stop /etc/keepalived/scripts/redis_stop.sh
}

Salve - redis  主节点2  keepalived.conf  配置：

 global_defs {
   router_id redis101
}

vrrp_script chk_redis
{
     script "/etc/keepalived/scripts/redis_check.sh 127.0.0.1 6379"
     interval
     timeout
     fall
}

vrrp_instance redis {
    state BACKUP
    interface bond0
    virtual_router_id
    priority
    advert_int
authentication {   #all node must same
       auth_type PASS
       auth_pass
    }

    virtual_ipaddress {
    1.2.3.4/
    }

    track_script {
        chk_redis
    } 

    notify_master "/etc/keepalived/scripts/redis_master.sh 127.0.0.1  1.2.3.2 6379"
    notify_backup "/etc/keepalived/scripts/redis_backup.sh 127.0.0.1  1.2.3.2 6379"
    notify_fault /etc/keepalived/scripts/redis_fault.sh
    notify_stop /etc/keepalived/scripts/redis_stop.sh
}　　

VIP 检测 漂移

redis 备份脚本：

# redis_backup.sh

#!/bin/bash
REDISCLI="/usr/local/redis/src/redis-cli -h $1 -p $3"
LOGFILE="/etc/keepalived/log/keepalived-redis-state.log"
echo "[backup]" >> $LOGFILE
date >> $LOGFILE
echo "Run SLAVEOF cmd ..." >> $LOGFILE
$REDISCLI SLAVEOF $ $ >> $LOGFILE >&
# echo "Being slave...." >> $LOGFILE >&
sleep
#delay  s wait data sync exchange role

-----

Redis 检测脚本 ：

# redis_check.sh

#!/bin/bash
ALIVE=`/usr/local/redis/src/redis-cli -h $ -p $ PING`
LOGFILE="/etc/keepalived/log/keepalived-redis-check.log"
echo "[CHECK]" >> $LOGFILE
date >> $LOGFILE

if [ $ALIVE == "PONG" ]; then :
   echo "Success: redis-cli -h $1 -p $2 PING $ALIVE" >> $LOGFILE >&
   exit
else
   echo "Failed:redis-cli -h $1 -p $2 PING $ALIVE " >> $LOGFILE >&
   exit
fi 

-----

redis 故障判断脚本：

# redis_fault.sh

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

-----

redis 主节点检测脚本：

# redis_master.sh

#!/bin/bash
REDISCLI="/usr/local/redis/src/redis-cli -h $1 -p $3"
LOGFILE="/etc/keepalived/log/keepalived-redis-state.log"
echo "[master]" >> $LOGFILE
date >> $LOGFILE
echo "Being master...." >> $LOGFILE >&
echo "Run MASTER cmd ..." >> $LOGFILE >&
$REDISCLI SLAVEOF $ $ >> $LOGFILE
sleep
#delay  s wait data async cancel sync

echo "Run SLAVEOF NO ONE cmd ..." >> $LOGFILE
$REDISCLI SLAVEOF NO ONE >> $LOGFILE >&

　　-----

redis 检测停止脚本：

# redis_stop.sh

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