两台redis + keepalived主备

32121fff

1 redis安装、  keepalived安装

2 keepalived配置
master:
/etc/keepalived/keepalived.conf
############
! Configuration File for keepalived
vrrp_script chk_redis {
                script "/etc/keepalived/scripts/redis_check.sh"   ###监控脚本
                interval 2                                        ###监控时间
}
vrrp_instance VI_1 {
        state MASTER                            ###设置为MASTER
        interface eth0                          ###监控网卡   
        virtual_router_id 51
        priority 110                           ###权重值
        authentication {
                     auth_type PASS             ###加密
                     auth_pass 7IB8LAW3RB       ###密码
        }
        track_script {
                chk_redis                       ###执行上面定义的chk_redis
        }
        virtual_ipaddress {
             192.168.2.200                         ###VIP
        }
        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
}
#########
/etc/keepalived/scripts/下创建脚本(注意脚本要有可执行权限)：
redis_master.sh
###############
#!/bin/bash

REDISCLI="/usr/local/redis/bin/redis-cli"
LOGFILE="/var/log/keepalived-redis-state.log"

echo "[master]" >> $LOGFILE
date >> $LOGFILE
echo "Being master...." >> $LOGFILE 2>&1

echo "Run SLAVEOF cmd ..." >> $LOGFILE
$REDISCLI -p 6379 -a admin SLAVEOF 192.168.2.82 6379 >> $LOGFILE  2>&1
sleep 10 #延迟10秒以后待数据同步完成后再取消同步状态

echo "Run SLAVEOF NO ONE cmd ..." >> $LOGFILE
$REDISCLI -p 6379 -a admin SLAVEOF NO ONE >> $LOGFILE 2>&1
########

redis_backup.sh
########
#!/bin/bash

REDISCLI="/usr/local/redis/bin/redis-cli"
LOGFILE="/var/log/keepalived-redis-state.log"

echo "[backup]" >> $LOGFILE
date >> $LOGFILE
echo "Being slave...." >> $LOGFILE 2>&1

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 "Run SLAVEOF cmd ..." >> $LOGFILE
$REDISCLI -p 6379 -a admin SLAVEOF 192.168.2.82 6379 >> $LOGFILE  2>&1
########
192.168.2.82从机IP

redis_fault.sh
######
#!/bin/bash

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

echo "[fault]" >> $LOGFILE
date >> $LOGFILE
#####

redis_stop.sh
####
#!/bin/bash

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

echo "[fault]" >> $LOGFILE
date >> $LOGFILE
####


backup:
/etc/keepalived/keepalived.conf
##########
! Configuration File for keepalived
vrrp_script chk_redis {
                script "/etc/keepalived/scripts/redis_check.sh"   ###监控脚本
                interval 2                                        ###监控时间
}
vrrp_instance VI_1 {
        state BACKUP                                ###设置为BACKUP
        interface eth0                              ###监控网卡
        virtual_router_id 51
        priority 100                                ###比MASTRE权重值低
        authentication {
                     auth_type PASS
                     auth_pass 7IB8LAW3RB           ###密码与MASTRE相同
        }
        track_script {
                chk_redis                       ###执行上面定义的chk_redis
        }
        virtual_ipaddress {
            192.168.2.200                         ###VIP
        }
        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
}

/etc/keepalived/scripts/下创建脚本：
redis_master.sh
####

#!/bin/bash

REDISCLI="/usr/local/redis/bin/redis-cli"
LOGFILE="/var/log/keepalived-redis-state.log"

echo "[master]" >> $LOGFILE
date >> $LOGFILE
echo "Being master...." >> $LOGFILE 2>&1

echo "Run SLAVEOF cmd ..." >> $LOGFILE
#$REDISCLI -h 192.168.2.82 -p 6379 -a admin SLAVEOF NO ONE
$REDISCLI -p 6379 -a admin SLAVEOF 192.168.2.81 6379
sleep 10 #延迟10秒以后待数据同步完成后再取消同步状态

echo "Run SLAVEOF NO ONE cmd ..." >> $LOGFILE
$REDISCLI -p 6379 -a admin SLAVEOF NO ONE >> $LOGFILE 2>&1
####
192.168.2.81为masterIP

redis_backup.sh
#####
#!/bin/bash

REDISCLI="/usr/local/redis/bin/redis-cli"
LOGFILE="/var/log/keepalived-redis-state.log"

echo "[backup]" >> $LOGFILE
date >> $LOGFILE
echo "Being slave...." >> $LOGFILE 2>&1

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 "Run SLAVEOF cmd ..." >> $LOGFILE
#$REDISCLI SLAVEOF -h 192.168.2.81 -p 6379 -a admin >> $LOGFILE  2>&1
$REDISCLI  -h 192.168.2.82 -p 6379 -a admin slaveof 192.168.2.81 6379
####

redis_fault.sh
####
#!/bin/bash

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

echo "[fault]" >> $LOGFILE
date >> $LOGFILE
####

redis_stop.sh
####
#!/bin/bash

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

echo "[stop]" >> $LOGFILE
date >> $LOGFILE
####