Centos7 定时监测应用并重启

Centos7 定时监测应用并重启

系统服务器在运行过程中因需要时刻检测数据库和nginx等软件是否在正常工作，特编写脚本进行检测应用状态，并在应用出问题时进行重启。
因为监测时用到lsof命令，如提示lsof命令不存在，请自行安装命令

yum install lsof -y

检测应用状态脚本

#!/bin/bash
LOG_FILE="autostart.log"
#检测nginx
curtime=$(date "+%Y-%m-%d %H:%M:%S")
a=`lsof -i:80 |grep 'nginx' |grep -v grep |grep -v agent|sort | tail -1 | cut -f 1 -d ' '`
if [[ $a != 'nginx' ]]; then
    echo "$curtime 系统检测到nginx,已挂掉,启动中...." >> autostart.log;
    /usr/sbin/nginx #启动nginx命令
    echo "$curtime nginx启动完成" >> autostart.log;
else
    echo "$curtime 系统检测到nginx运行正常" >> autostart.log;
fi

#检测Redis

    checkRedis=`lsof -i:6379 |grep 'redis-ser' |grep -v grep |grep -v agent|sort | tail -1 | cut -f 1 -d ' '`
    if [[ $checkRedis != 'redis-ser' ]]; then
        echo "$curtime 系统检测到Redis已挂掉,启动中...." >> autostart.log;
        /home/software/redis/redis-4.0.2/src/redis-server /home/software/redis/redis-4.0.2/redis.conf  #启动redis
        echo "$curtime Redis启动完成" >> autostart.log;
    else
            echo "$curtime 系统检测到Redis运行正常" >> autostart.log;
    fi
    
    #检测Mongodb
    checkRedis=`lsof -i:27017 |grep 'mongod' |grep -v grep |grep -v agent|sort | tail -1 | cut -f 1 -d ' '`
    if [[ $checkRedis != 'mysqld' ]]; then
        echo "$curtime 系统检测到Mongodb已挂掉,启动中...." >> autostart.log;
        mongod --config /etc/mongod.conf #启动命令
        echo "$curtime Mongodb启动完成" >> autostart.log;
    else
        echo "$curtime 系统检测到Mongodb运行正常" >> autostart.log;
    fi

将脚本添加到定时任务

crontab -e

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root