Redis+Keepalived

简介

Redis高可用方案，保障两台Redis任意节点故障可正常使用。

方案：Redis主从复制+Redis哨兵+Keepalived

环境

系统：Centos/Radhat 7

服务1：Redis 3.2.12

服务2：Keepalived 1.3.5

服务器数量：两台

主：192.168.1.151

备：192.168.1.152

VIP：192.168.1.153

部署

Redis：主从复制+哨兵：https://www.cnblogs.com/xiangsikai/p/11995552.html

安装 Keepalived

1、主备服务器同时安装通过yum安装Keepalived

yum -y install keepalived

配置 Keepalived

1、主：配置Keepalived 配置文件

vim /etc/keepalived/keepalived.conf

global_defs {
   router_id Redis-HA
}
vrrp_instance VI_1 {
state BACKUP
interface eno16777728
virtual_router_id 51
priority 200
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}

virtual_ipaddress {
192.168.1.153
}
}

virtual_server 192.168.1.153 6379 {
delay_loop 2
protocol TCP
real_server 192.168.1.151 6379 {
notify_down /redis.sh
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
  }
}
}

2、备：配置Keepalived配置文件

vim /etc/keepalived/keepalived.conf

global_defs {
   router_id Redis-HA
}
vrrp_instance VI_1 {
state BACKUP
interface eno16777728
virtual_router_id 51
priority 190
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.153
}
}

virtual_server 192.168.1.153 6379 {
delay_loop 2
protocol TCP
real_server 192.168.1.150 6379 {
notify_down /redis.sh
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
  }
}
}

3、主备：创建执行脚本并加入权限

vim /redis.sh

#!/bin/bash
pkill keepalived

chmod +x /redis.sh

4、主备：启动Keepalived服务。

注：Redis Master 端优先启动获取VIP

systemctl start keepalived
systemctl enable keepalived

5、查看vip

ip a