Service Auto Recovery

Hi All,

I thought I'd share this tip, I wanted a script that would restart httpd/mysql if the process died (full waffle here), written & tested on CentOS your mileage might vary elsewhere, but obviously it can easily be expanded to "recover" the full range of ISPConfig services.

Save the following code in /etc/cron.hourly

Code:

#!/bin/bash

# taken from redhast default scripts - /etc/rc.d/init.d/functions

# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin"
export PATH

status() {
        local base=${1##*/}
        local pid

        # Test syntax.
        if [ "$#" = 0 ] ; then
                echo $"Usage: status {program}"
                return 1
        fi

        # First try "pidof"
        pid=`pidof -o $$ -o $PPID -o %PPID -x $1 ||
             pidof -o $$ -o $PPID -o %PPID -x ${base}`
        if [ -n "$pid" ]; then
# Uncomment this if you want OK messages
#               echo $"${base} (pid $pid) is running..."
                return 0
        fi

        # Next try "/var/run/*.pid" files
        if [ -f /var/run/${base}.pid ] ; then
                read pid < /var/run/${base}.pid
                if [ -n "$pid" ]; then
                        echo $"${base} dead but pid file exists"
                        /etc/init.d/${base} restart
                        return 1
                fi
        fi
        # See if /var/lock/subsys/${base} exists
        if [ -f /var/lock/subsys/${base} ]; then
                echo $"${base} dead but subsys locked"
                /etc/init.d/${base} restart
                return 2
        fi
        echo $"${base} is stopped"
        return 3
}

# found in /etc/init.d/httpd
httpd=${HTTPD-/usr/sbin/httpd}

status mysqld
status $httpd

If anyone has a cleaner / better solution I'd be glad to hear it
Good Luck !

 

You can do the same with monit: http://www.tildeslash.com/monit/

 

cool, thanks for the link, I'll check it out