Keepalived配置nginx自動重啟

1. 增加nginx 檢查腳本

vim /etc/keepalived/check_nginx_alive_or_not. sh

#!/bin/bash
A=`ps -C nginx --no-header | wc -l`
# 判斷nginx是否宕機，如果宕機嘗試重新啟動
if [ $A -eq 0 ];then
      /usr/local/nginx/sbin/nginx
      # 等待3秒檢查nginx 如果沒有啟動成功 則停止keepalived 啟動備用機
      sleep 3
      if [`ps -C nginx --no-header I wc -l` -eq 0 ];then
      killall keepalived
      fi
fi

# 增加運行權限
chmod +x /etc/keepalived/check_nginx_alive_or_not.sh

2. 配置keepalived監聽nginx腳本

vrrp_script check_nginx_alived {
      script "/etc/keepalived/check_nginx_alive_or_not.sh"
      interval 2 #每隔2秒運行一次
      weight 10 # 運行成功 權重加10
}

3. 在vrrp_ instance 中新增監控腳本

track_script {
      check_nginx_alive # 添加nginx腳本
}

4. 重啟keepalived使配置文件生效

systemctl restart keepalived