Master: T1
Slave: T2
VIP: 192.168.68.45redis
注意: 安裝redis前flushall的修改vim
查找
src/redis.c
文件,把
{"flushdb",flushdbCommand,1,"w",0,NULL,0,0,0,0,0},
{"flushall",flushallCommand,1,"w",0,NULL,0,0,0,0,0},
修改爲:
{"xflushdb",flushdbCommand,1,"w",0,NULL,0,0,0,0,0},
{"xflushall",flushallCommand,1,"w",0,NULL,0,0,0,0,0},
bash
vi /etc/sysctl.conf 添加一行: `vm.overcommit_memory=1` mkdir /opt/redis mkdir /opt/redis/log mkdir /opt/redis/db tar zxvf ./redis-2.8.17.tar.gz cd redis-2.8.17 make PREFIX=/opt/redis install
#!/bin/bash basedir=`dirname $0` echo "Redis BASE DIR:$basedir" cd $basedir nohup ./redis-server ./redis.conf > /dev/null 2>&1 &
#!/bin/sh basedir=`dirname $0` echo "Redis BASE DIR:$basedir" cd $basedir ./redis-cli -h localhost -a 123456 shutdown
#requirepass 123456 pidfile /opt/redis/bin/redis.pid logfile /opt/redis/log/redis.log dir /opt/redis/db/ daemonize yes port 6379 timeout 300 loglevel warning databases 16 maxmemory 1g #不要快照 #save 900 1 #save 300 10 #save 60 10000 #rdbcompression yes #dbfilename dump.rdb #使用AOF appendonly yes appendfsync everysec
#wget http://www.keepalived.org/software/keepalived-1.2.13.tar.gz tar zxvf keepalived-1.2.13.tar.gz cd ./keepalived-1.2.13 ./configure make make install cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/ cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/ cp /usr/local/sbin/keepalived /usr/sbin/ mkdir /etc/keepalived cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/ chkconfig --add keepalived #chkconfig --level 35 keepalived on #service keepalived start
Keepalived在轉換狀態時會依照狀態來呼叫: 當進入Master狀態時會呼叫notify_master 當進入Backup狀態時會呼叫notify_backup 當發現異常狀況時(track_script,track_interface失敗)進入Fault狀態呼叫notify_fault 當Keepalived程序終止時則呼叫notify_stop
vim /etc/keepalived/keepalived.conf
app
! Configuration File for keepalived global_defs { notification_email { root@localhost } notification_email_from root@localhost smtp_server localhost smtp_connect_timeout 30 router_id LVS_REDIS } vrrp_script chk_redis { script "/etc/keepalived/scripts/redis_check.sh" ###監控腳本 interval 2 ###監控時間 } vrrp_instance VI_1 { nopreempt ###不搶佔,防止腦裂 state MASTER #備的是BACKUP interface br0 virtual_router_id 51 priority 100 #備的是90 advert_int 1 authentication { auth_type PASS auth_pass redis } virtual_ipaddress { 192.168.68.45 } track_script { chk_redis ###執行上面定義的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 }
vim /etc/keepalived/keepalived.conf
ui
! Configuration File for keepalived global_defs { notification_email { root@localhost } notification_email_from root@localhost smtp_server localhost smtp_connect_timeout 30 router_id LVS_REDIS } vrrp_script chk_redis { script "/etc/keepalived/scripts/redis_check.sh" ###監控腳本 interval 2 ###監控時間 } vrrp_instance VI_1 { nopreempt ###不搶佔,防止腦裂 state BACKUP #備的是BACKUP interface br0 virtual_router_id 51 priority 90 #備的是90 advert_int 1 authentication { auth_type PASS auth_pass redis } virtual_ipaddress { 192.168.68.45 } track_script { chk_redis ###執行上面定義的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 }
mkdir /etc/keepalived/scripts/
vi /etc/keepalived/scripts/redis_check.sh
code
#!/bin/bash C_DATE=`date +"[%Y-%m-%d %H:%M:%S]"` ALIVE=`/opt/redis/bin/redis-cli PING` if [ "$ALIVE" == "PONG" ]; then echo "${C_DATE} $ALIVE" exit 0 else echo "${C_DATE} $ALIVE" exit 1 fi
notify_fault
和notify_stop
:vim /etc/keepalived/scripts/redis_fault.sh
router
#!/bin/bash C_DATE=`date +"[%Y-%m-%d %H:%M:%S]"` LOGFILE=/var/log/keepalived-redis-state.log echo "${C_DATE} [fault]" >> $LOGFILE
vim /etc/keepalived/scripts/redis_stop.sh
server
#!/bin/bash C_DATE=`date +"[%Y-%m-%d %H:%M:%S]"` LOGFILE=/var/log/keepalived-redis-state.log echo "${C_DATE} [stop]" >> $LOGFILE
notity_master
與notify_backup
腳本:vim /etc/keepalived/scripts/redis_master.sh
ip
#!/bin/bash C_DATE=`date +"[%Y-%m-%d %H:%M:%S]"` REDISCLI="/opt/redis/bin/redis-cli" LOGFILE="/var/log/keepalived-redis-state.log" echo "${C_DATE} [master]" >> $LOGFILE #當keepalived配置爲"搶佔式"時,打開下面註釋 #echo "Being master...." >> $LOGFILE 2>&1 #echo "Run SLAVEOF cmd ..." >> $LOGFILE #$REDISCLI SLAVEOF T2 6379 >> $LOGFILE 2>&1 #sleep 10 #延遲10秒之後待數據同步完成後再取消同步狀態 echo "Run SLAVEOF NO ONE cmd ..." >> $LOGFILE $REDISCLI SLAVEOF NO ONE >> $LOGFILE 2>&1
vim /etc/keepalived/scripts/redis_backup.sh
get
#!/bin/bash C_DATE=`date +"[%Y-%m-%d %H:%M:%S]"` REDISCLI="/opt/redis/bin/redis-cli" LOGFILE="/var/log/keepalived-redis-state.log" echo "${C_DATE} [backup]" >> $LOGFILE #當keepalived配置爲"搶佔式"時,打開下面註釋 #echo "Being slave...." >> $LOGFILE 2>&1 #sleep 15 #延遲15秒待數據被對方同步完成以後再切換主從角色 echo "Run SLAVEOF cmd ..." >> $LOGFILE $REDISCLI SLAVEOF T2 6379 >> $LOGFILE 2>&1
notity_master
與notify_backup
腳本:vim /etc/keepalived/scripts/redis_master.sh
#!/bin/bash C_DATE=`date +"[%Y-%m-%d %H:%M:%S]"` REDISCLI="/opt/redis/bin/redis-cli" LOGFILE="/var/log/keepalived-redis-state.log" echo "${C_DATE} [master]" >> $LOGFILE #當keepalived配置爲"搶佔式"時,打開下面註釋 #echo "Being master...." >> $LOGFILE 2>&1 #echo "Run SLAVEOF cmd ..." >> $LOGFILE #$REDISCLI SLAVEOF T1 6379 >> $LOGFILE 2>&1 #sleep 10 #延遲10秒之後待數據同步完成後再取消同步狀態 echo "Run SLAVEOF NO ONE cmd ..." >> $LOGFILE $REDISCLI SLAVEOF NO ONE >> $LOGFILE 2>&1
vim /etc/keepalived/scripts/redis_backup.sh
#!/bin/bash C_DATE=`date +"[%Y-%m-%d %H:%M:%S]"` REDISCLI="/opt/redis/bin/redis-cli" LOGFILE="/var/log/keepalived-redis-state.log" echo "${C_DATE} [backup]" >> $LOGFILE #當keepalived配置爲"搶佔式"時,打開下面註釋 #echo "Being slave...." >> $LOGFILE 2>&1 #sleep 15 #延遲15秒待數據被對方同步完成以後再切換主從角色 echo "Run SLAVEOF cmd ..." >> $LOGFILE $REDISCLI SLAVEOF T1 6379 >> $LOGFILE 2>&1
chmod +x /etc/keepalived/scripts/*.sh
啓動Master上的Redis /opt/redis/bin/startRedis.sh
啓動Slave上的Redis /opt/redis/bin/startRedis.sh
啓動Master上的Keepalived service keepalived start
啓動Slave上的Keepalived service keepalived start