1. 增加Nginx重启检测脚本

  1. vim /etc/keepalived/check_nginx_alive_or_not.sh
  1. #!/bin/bash
  3. A=`ps -C nginx --no-header |wc -l`
  4. # 判断nginx是否宕机，如果宕机了，尝试重启
  5. if [ $A -eq 0 ];then
  6.     /usr/local/nginx/sbin/nginx
  7.     # 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
  8.     sleep 3
  9.     if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
  10.         killall keepalived
  11.     fi
  12. 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

  1. vrrp_script check_nginx_alive {
  2.     script "/etc/keepalived/check_nginx_alive_or_not.sh"
  3.     interval 2 # 每隔两秒运行上一行脚本
  4.     weight 10 # 如果脚本运行成功，则升级权重+10
  5.     # weight -10 # 如果脚本运行失败，则升级权重-10
  6. }

3. 在vrrp_instance中新增监控的脚本

  1. track_script {
  2.     check_nginx_alive   # 追踪 nginx 脚本
  3. }

4. 重启Keepalived使得配置文件生效

  1. systemctl restart keepalived