WatchDog watchdog.sh script for checking server running

---

#!/bin/bash

# Service watchdog script

# Put in crontab to automatially restart services (and optionally email you) if they die for some reason.

# Note: You need to run this as root otherwise you won't be able to restart services.

#

# Example crontab usage:

#

# Strict check for apache2 service every 5 minutes, pipe results to /dev/null

# */5 * * * * sh /root/watchdog.sh apache2 "" > /dev/null

#

# "Loose" check for mysqld every 5 minutes, second parameter is the name of the service

# to restart, in case the application and service names differ. Also emails a report to admin@domain.com

# about the restart.

# */5 * * * * sh /root/watchdog.sh mysqld mysql admin@domain.com > /dev/null

# Common daemon names:

# Apache:

# apache2 - Debian/Ubuntu

# httpd - RHEL/CentOS/Fedora

# ---

# MySQL:

# mysql - Debian/Ubuntu

# mysqld - RHEL/CentOS/Fedora

# ---

# Service name

DATE=`date +%Y-%m-%d--%H-%M-%S`

SERVICE_NAME="$1"

SERVICE_RESTARTNAME="$2"

EXTRA_PGREP_PARAMS="-x" #Extra parameters to pgrep, for example -x is good to do exact matching

MAIL_TO="$3" #Email to send restart notifications to

#path to pgrep command, for example /usr/bin/pgrep

PGREP="pgrep"

#Check if we have have a second param

if [ -z $SERVICE_RESTARTNAME ]

then

RESTART="/sbin/service ${SERVICE_NAME} restart" #No second param

else

RESTART="/sbin/service ${SERVICE_RESTARTNAME} restart" #Second param

fi

pids=`$PGREP ${EXTRA_PGREP_PARAMS} ${SERVICE_NAME}`

#if we get no pids, service is not running

if [ "$pids" == "" ]

then

$RESTART

if [ -z $MAIL_TO ]

then

echo "$DATE : ${SERVICE_NAME} restarted - no email report configured."

else

echo "$DATE : Performing restart of ${SERVICE_NAME}" | mail -s "Service failure: ${SERVICE_NAME}" ${MAIL_TO}

fi

else

echo "$DATE : Service ${SERVICE_NAME} is still working!"

fi

#!/bin/bash

mailto="mymail@mydomain"

/bin/bash /root/watchdog.sh mysqld mysqld "$mailto"

/bin/bash /root/watchdog.sh httpd httpd "$mailto"

/bin/bash /root/watchdog.sh pound pound "$mailto"

/bin/bash /root/watchdog.sh redis-server redis "$mailto"

/bin/bash /root/watchdog.sh memcached memcached "$mailto"

/bin/bash /root/watchdog.sh searchd searchd "$mailto"

---

Article Number: 344
Posted: Tue, Jul 31, 2018 9:37 AM
Last Updated: Tue, Jul 31, 2018 9:37 AM

Online URL: http://kb.ictbanking.net/article.php?id=344