Keepalived配置nginx自动重启

1. 增加nginx 检查脚本

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，如果宕机尝试重新启动
if [ $A -eq 0 ];then
      /usr/local/nginx/sbin/nginx
      # 等待3秒检查nginx 如果没有启动成功 则停止keepalived 启动备用机
      sleep 3
      if [`ps -C nginx --no-header I 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_alived {
      script "/etc/keepalived/check_nginx_alive_or_not.sh"
      interval 2 #每隔2秒运行一次
      weight 10 # 运行成功 权重加10
}

3. 在vrrp_ instance 中新增监控脚本

track_script {
      check_nginx_alive # 添加nginx脚本
}

4. 重启keepalived使配置文件生效

systemctl restart keepalived