keepalived

最新推荐文章于 2024-03-22 16:58:08 发布

原创最新推荐文章于 2024-03-22 16:58:08 发布 · 107 阅读

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集群介绍

准备环境:

两个机器分别

安装 keepalived

https://coding.net/u/aminglinux/p/aminglinux-book/git/blob/master/D21Z/master_keepalived.conf

清空原始文件

#全局定义#
global_defs {   
   notification_email {
     aming@aminglinux.com
   }
   notification_email_from root@aminglinux.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
#检测服务是否正常#
vrrp_script chk_nginx {   
    script "/usr/local/sbin/check_ng.sh"
    interval 3
#检测时间3秒#
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33
#与从机器id 要保持一致
    virtual_router_id 51   
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass aminglinux>com
    }
## 定义一个公有IP
    virtual_ipaddress {
        192.168.188.100
    }

    track_script {
        chk_nginx
    }

}

定义一个脚本检查nginx是否正常的shell脚本

vi /usr/local/sbin/check_ng.sh

#!/bin/bash
#时间变量，用于记录日志
d=`date --date today +%Y%m%d_%H:%M:%S`
#计算nginx进程数量
n=`ps -C nginx --no-heading|wc -l`
#如果进程为0，则启动nginx，并且再次检测nginx进程数量，
#如果还为0，说明nginx无法启动，此时需要关闭keepalived
if [ $n -eq "0" ]; then
        /etc/init.d/nginx start
        n2=`ps -C nginx --no-heading|wc -l`
        if [ $n2 -eq "0"  ]; then
                echo "$d nginx down,keepalived will stop" >> /var/log/check_ng.log
                systemctl stop keepalived
        fi
fi

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