关于keepalived的详细介绍,请移步本人相关博客:http://wangfeng7399.blog.51cto.com/3518031/1405785
功能 | ip地址 | 安装软件 |
主redis | 10.13.6.13 | redis,keepalived |
从redis | 10.13.6.16 | redis,keepalived |
VIP | 10.13.6.17 |
一、redis主从搭建
1.redis安装
本文通过yum源的安装方式来安装(需要配置epel源),也可以通过源码编译的方式来安装
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[root@P2Pp_Red01 ~] # yum install -y redis
[root@P2Pp_Red02 ~] # yum install -y redis
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2.修改配置文件
①、主redis需要修改的文件及内容
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[root@P2Pp_Red01 ~] # vi /etc/redis.conf
bind 0.0.0.0 其余都可以安装默认状态 |
②、从redis需要修改的文件及内容
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[root@P2Pp_Red02 ~] # vi /etc/redis.conf
bind 0.0.0.0 slaveof 10.13.6.13 6379 // 指定主redis的地址与端口
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3.查看主从状态
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[root@P2Pp_Red01 ~] # redis-cli INFO |grep role -A 3
role:master slave0:10.13.6.16,45270,online db0:keys=6,expires=0 [root@P2Pp_Red02 ~] # redis-cli INFO |grep role -A 3
role:slave master_host:10.13.6.13 master_port:6379 master_link_status:up |
二、使用keepalived对redis做高可用
1.安装keepalived,两台机器都需要安装
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[root@P2Pp_Red01 ~] # yum install -y keepalived
[root@P2Pp_Red02 ~] # yum install -y keepalived
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2.准备配置文件
①、主redis的配置文件,关于各行代表的意思,请移步我的另外一篇文档,链接见文章开头
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[root@P2Pp_Red01 scripts] # vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs { notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 10.13.4.17
smtp_connect_timeout 30
router_id LVS_DEVEL
} vrrp_script chk_redis { script "killall -0 redis-server"
interval 2
} vrrp_instance VI_1 { state MASTER
interface eth0
virtual_router_id 100
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.13.6.17
}
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
} ~[root@P2Pp_Red01 ~] # vi /etc/keepalived/scripts/redis_master.sh
#!/bin/bash REDISCLI= "/usr/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 SLAVEOF 10.13.4.13 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 SLAVEOF NO ONE >> $LOGFILE 2>&1 ~ [root@P2Pp_Red01 ~] # vi /etc/keepalived/scripts/redis_backup.sh
#!/bin/bash REDISCLI= "/usr/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 10.13.4.13 6379 >> $LOGFILE 2>&1 [root@P2Pp_Red01 scripts] # vi /etc/keepalived/scripts/redis_stop.sh
#!/bin/bash LOGFILE= /var/log/keepalived-redis-state .log
echo "[stop]" >> $LOGFILE
date >> $LOGFILE
[root@P2Pp_Red01 scripts] # vi /etc/keepalived/scripts/redis_fault.sh
#!/bin/bash GFILE= /var/log/keepalived-redis-state .log
echo "[fault]" >> $LOGFILE
date >> $LOGFILE
~ |
②、准备从redis的配置文件
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[root@P2Pp_Red02 ~] # vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs { notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 10.13.4.13
smtp_connect_timeout 30
router_id LVS_DEVEL
} vrrp_script chk_redis { script "killall -0 redis-server"
interval 1
} vrrp_instance VI_1 { state BACKUP
interface eth0
virtual_router_id 100
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.13.6.17
}
#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 [root@P2Pp_Red02 ~] # vi /etc/keepalived/scripts/redis_master.sh
#!/bin/bash REDISCLI= "/usr/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 SLAVEOF 10.13.6.13 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 SLAVEOF NO ONE >> $LOGFILE 2>&1 ~ [root@P2Pp_Red02 ~] # vi /etc/keepalived/scripts/redis_backup.sh
#!/bin/bash REDISCLI= "/usr/bin/redis-cli"
LOGFILE= "/var/log/keepalived-redis-state.log"
echo "[backup]" >> $LOGFILE
date >> $LOGFILE
echo "Being slave....
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 10.13.6.13 6379 >> $LOGFILE 2>&1 其余的两个文件跟主redis是一样的 |
本处将不再给模拟故障,但是测试时通过的,现在已经在生产环境中使用
本文出自 “IT民工--小枫” 博客,请务必保留此出处http://wangfeng7399.blog.51cto.com/3518031/1591275