keeplived+nginx实例配置

亦凉 2023-06-10 15:20 7阅读 0赞

安装keepalived参考[https://blog.csdn.net/letterss/article/details/102737234][https_blog.csdn.net_letterss_article_details_102737234]

安装nginx参考[https://blog.csdn.net/letterss/article/details/82869820][https_blog.csdn.net_letterss_article_details_82869820]

安装keepalived后，在/etc/keepalived/配置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 127.0.0.1
       smtp_connect_timeout 30
       router_id LVS_DEVEL
    }
    
    vrrp_script chk_nginx {
        script "/etc/keepalived/nginx_check.sh" #运行脚本，脚本内容下面有，就是起到一个nginx宕机以后，自动开启服务
        interval 2 #检测时间间隔
        weight -5  #如果条件成立的话，则权重 -20
        fall 2      #检测连续2次失败才算确定是真失败。会用weight减少优先级（1-255之间）
    	rise 1   #检测1次成功就算成功。但不修改优先级
    	
    }
    vrrp_instance VI_1 {
        state MASTER #来决定主从
        interface eth0 # 绑定虚拟 IP 的网络接口，根据自己的机器填写
        virtual_router_id 51 # 虚拟路由的 ID 号， 两个节点设置必须一样
    	mcast_src_ip 192.168.204.129 #填写本机ip
        priority 100 # 节点优先级,主要比从节点优先级高
    	 nopreempt # 优先级高的设置 nopreempt 解决异常恢复后再次抢占的问题
        advert_int 1 # 组播信息发送间隔，两个节点设置必须一样，默认 1s
        authentication {
            auth_type PASS
            auth_pass 1111
        }
    	
    	# 将 track_script 块加入 instance 配置块
        track_script {
            chk_nginx #执行 Nginx 监控的服务
        }
    
        virtual_ipaddress {
            192.168.204.131 dev eth0 # 虚拟ip
           
        }
    }

在/etc/keepalived/下面创建nginx\_check.sh脚本

vi nginx\_check.sh

#!/bin/bash
    counter=$(ps -C nginx --no-heading|wc -l)
    if [ "${counter}" = "0" ]; then
        /usr/local/nginx/sbin/nginx
        sleep 2
        counter=$(ps -C nginx --no-heading|wc -l)
        if [ "${counter}" = "0" ]; then
            /etc/init.d/keepalived stop
        fi
    fi

最后加上执行权限

**chmod 755 /etc/keepalived/nginx\_check.sh**

在浏览器输入keepalived虚拟ip192.168.204.131

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[https_blog.csdn.net_letterss_article_details_102737234]: https://blog.csdn.net/letterss/article/details/102737234
[https_blog.csdn.net_letterss_article_details_82869820]: https://blog.csdn.net/letterss/article/details/82869820
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