Keepalived配置Nginx自动重启

当Nginx因异常停止不会切换到Keepalived的备用机，所以需要配置一个脚本

1.增加Nginx重启检测脚本

vim /etc/keepalived/check_nginx_alive_or_not.sh

#!/bin/bash A=`ps -C nginx --no-header |wc -l` # 判断nginx是否宕机，如果宕机了，尝试重启 if [$A -eq 0 ];then /usr/local/nginx/sbin/nginx # 等待一小会再次检查nginx，如果没有启动成功，则停止keepalived，使其启动备用机 sleep 3 if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then killall keepalived fi fi 增加运行权限

chmod +x /etc/keepalived/check_nginx_alive_or_not.sh

2.配置keepalived监听nginx脚本

vrrp_script check_nginx_alive { script "/etc/keepalived/check_nginx_alive_or_not.sh" interval 2 # 每隔两秒运行上一个脚本 weight 10 # 如果脚本运行失败，则升级权重+10 }

3.在 vrrp_instance 中新增监控的脚本

track_script { check_nginx_alive # 追踪 nginx 脚本 }

4.重启Keepalived使得配置文件生效

systemctl restart keepalived