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 |
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
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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
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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
~
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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
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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
本文转自wangfeng7399 51CTO博客，原文链接：http://blog.51cto.com/wangfeng7399/1591275，如需转载请自行联系原作者
