Linux checks whether the specified program is running the monitoring script

Author: Chen Jinjian
personal blog: HTTPS: //jian1098.github.io
CSDN blog: https: //blog.csdn.net/c_jian
Jane book: https: //www.jianshu.com/u/8ba9ac5706b6
Contact: jian1098 @qq.com

Description

This script can detect Linuxwhether the program with the specified name is running. If it detects that it is not running, start the program and make a log record.

Scripting

vi monitor.sh

Modify the program name and directory in the following code, then copy and paste to save

#!/bin/sh

# 在这修改程序名和程序所在目录，其他不用改
name="entwallet"
path="/root/entwallet"

pid=`ps -A |grep $name| awk '{print $1}'`
now=`date  "+%Y-%m-%d %H:%M:%S"`

# 检测是否在运行
if [ ! $pid ]
then
	echo "$now $name is not running, start it now..."

	# 启动程序命令
	cd $path
	./entwallet start
	new_pid=`ps -A |grep $name| awk '{print $1}'`

	# 检测是否启动成功
	if [ ! $pid ]
	then
		echo "$now $name start successfully, pid is $new_pid"
	else
		"$now $name start failed!"
	fi

else 
	echo "$now $name is running, pid is $pid"
fi

Add execute permission

chmod +x ./monitor.sh

Add a scheduled task

crontab -e

Edit the running time of the script according to your needs, modify the directory where the log is stored, for example: check once a minute

* * * * * /home/leafserver/monitor.sh >> /home/leafserver/monitor.log 2>&1

Enter and save

View log

tail -f /home/leafserver/monitor.log

The log is as follows

2020-08-11 14:51:22 entwallet is not running, start it now...
2020-08-11 14:51:22 entwallet start successfully, pid is 17117
2020-08-11 14:52:01 entwallet is running, pid is 17117
2020-08-11 14:53:01 entwallet is running, pid is 17117
2020-08-11 14:54:01 entwallet is running, pid is 17117
2020-08-11 14:55:01 entwallet is running, pid is 17117