Simple shell script to manage services

[sywhk]

Hello!

Many of you may have think of how to keep essential services running during your server is up. Here is a simple shell script I just write and would like to share with you. Please let me know if there is any bug.

Please note the below bug fix version if you ever visit here. This version was tested and found working.

To use this script, you have to make an entry in the /etc/crontab as below.
# Check if essential services are running every 5 minutes and restart if not
*/5 * * * * root /usr/bin/cksrv.sh

Remember to make the script runnable by : chmod 770

File name : cksrv.sh

Code: Select all

#!/bin/bash
# File : /usr/bin/cksrv.sh (Version 1.1)
# Last update : 28 Dec 2017
# Copyright : GPL Licence Version 2 or above
# Bash shell script to test processes or services and then act on
# Super user right is required for running this shell script file.

# Array of services
srvary=( "nmb" "smb" "sshd" )

# Function to log failed service(s) with date and time
function logsrvstat()
{
    # Parameter srvstatcode & srvname are passed to this function
    # Create the log file by command : touch /yourpath/failsrv.log if needed.

    if [ "$srvstatcode" -eq 1 ]; then
        date +"%Y-%m-%d %H:%M:%S" >> /usr/bin/failsrv.log
		echo $srvname service "is not enabled! Enable it again..." >> /usr/bin/failsrv.log
	elif [ "$srvstatcode" -eq 2 ]; then
        date +"%Y-%m-%d %H:%M:%S" >> /usr/bin/failsrv.log
		echo $srvname service "is not running! Restarting..." >> /usr/bin/failsrv.log
	fi
}

for i in "${srvary[@]}"
do
	systemctl is-enabled $i.service > /dev/null
	if [ $? -gt 0 ]; then
	systemctl enable $i.service
        srvstatcode=1
        srvname=$i
        logsrvstat srvstatcode srvname
	fi
	systemctl is-active $i.service > /dev/null
	if [ $? -gt 0 ]; then
       	systemctl restart $i.service
       	srvstatcode=2
       	srvname=$i
       	logsrvstat srvstatcode srvname
    fi
done

[TrevorH]

You could also look at:

Code: Select all

# yum info monit
Loaded plugins: priorities
749 packages excluded due to repository priority protections
Available Packages
Name        : monit
Arch        : x86_64
Version     : 5.14
Release     : 1.el7
Size        : 269 k
Repo        : epel/x86_64
Summary     : Manages and monitors processes, files, directories and devices
URL         : http://mmonit.com/monit/
Licence     : AGPLv3
Description : monit is a utility for managing and monitoring, processes, files, directories
            : and devices on a UNIX system. Monit conducts automatic maintenance and repair
            : and can execute meaningful causal actions in error situations.