keepalived+nginx主主

keepalived+nginx的主备架构模式，始终会有一台服务器处于空闲状态，可以通过keepalived+nginx主主架构来实现两台服务器的合理利用，主主服务器对外有两个VIP地址来接收客户端的请求。

环境

192.168.2.118 nginx主/keepalived-master1 192.168.2.119 nginx从/keepalived-master2 192.168.2.112 lap

配置主主

在上一章已经在118和119服部署好了keepalived服务。接下来配置双主结构 备份好118和119的keepalived配置文件

cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak

118的keepalived配置文件内容如下

! Configuration File for keepalived global_defs { notification_email { abc@163.com } notification_email_from abc@163.com smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_script chk_nginx { script "/data/sh/check_nginx.sh" interval 2 weight 2 } vrrp_instance VI_1 { state MASTER interface eth0 lvs_sync_daemon_inteface eth0 virtual_router_id 50 priority 100 advert_int 5 nopreempt authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.2.130 } track_script { chk_nginx } } vrrp_instance VI_2 { state BACKUP interface eth0 lvs_sync_daemon_inteface eth0 virtual_router_id 51 priority 90 advert_int 5 nopreempt authentication { auth_type PASS auth_pass 2222 } virtual_ipaddress { 192.168.2.131 } track_script { chk_nginx } }

119服的keepalived配置文件参考上面的参数，把V1的state改成BACKUP，优先级priority改成90，把V2的state改成MASTER，优先级priority改成100

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nginx检测脚本check_nginx.sh（注意执行权限chmod u+x check_nginx.sh）

#!/bin/bash #2017年12月5日21:50:40 #auto check nginx #by lee ################### killall -0 nginx if [[ $? -ne 0 ]];then /etc/init.d/keepalived stop fi

启动118和119的keepalived服务并查看日志

service keepalived start tail -f /var/log/messages

可以看到进入了master

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查看ip

ip addr list

118服：

119服：

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浏览器分别访问：

手动停止118的nginx服务，然后再访问192.168.2.130，可以正常的打开web界面

查看VIP，可以看到VIP：192.168.2.130移到了119服下：

再次手动启动118的服务

[root@mysqlm keepalived]# /usr/local/nginx/sbin/nginx [root@mysqlm keepalived]# service keepalived start

可以看到VIP：192.168.2.130又返回到118服下

至此keepalived+nginx双主结构配置完成。