Server Administration: automatically restarting services

[John Seth]

I have a simple shell script useable by just about any linux system using
bash or sh.  I rewrote it this morning from an old irc Eggdrop bothck
shell script (why rewrite something that works??) and converted it for use
with Apache.  This is the file I use on my slackware system and is kept in
my /etc/cron.10min/ directory.

I tend to rewrite this file to work with most daemon's running with pid
files.  I drop the file into an /etc/cron.5min/ directory (or equivelant),
or setup in root's crontab on systems without /etc/cron.*

Rather than have it get garbled by wordwrap via email, and get deleted as
an attachment, I made it accessible via the web.  Edit to your hearts
desire.

http://www.phoenixwing.com/apachechk


Dennis Ruzeski said:
> This is a pretty simple shell script from UGU.com. The basic idea is
> that it greps for the process. If it doesn't see it, it restarts it..
> This one is ok, I've got a ksh version that's a little neater and a
> friend of mine wrote a perl script that's great, but I can't get a hold
> of him to get a copy.
>
>
> From UGU.com
> Here is a script that will keep daemons running
> if the decide to die for some unforseen reason.
>
> This tip generously supported by: ken at theglobeandmail.com
>
> -------------------- cut here -----------------
>
>
>
> #!/bin/csh
> #
> # NAME
> # keepitup.csh - Keep demons up and running
> #
> # SYNOPSIS
> # keepitup.csh
> #
> # DESCRIPTION
> # If any of the following processes are down, then start them up
> # again. This script can be run every few minutes from a crontab.
> #
> # AUTHOR
> # Ken Stevens
>
> foreach daemon ( \
> /opt/GIS/apps/EventDispatcher/scripts/EventDispatcher.pl \
> /opt/GIS/apps/CatchFTP/scripts/ProcessFTP.pl \
> /opt/GIS/apps/NewsHound/scripts/NewsHound.pl \
> )
>
> ps -e | fgrep `echo $daemon:t | cut -c1-8` > /dev/null
>
> if ( $status > 0 ) then
> echo Restarting $daemon
> date
> $daemon &
> endif
>
> end
>
>
>
> -----Original Message-----
> From: Matt Cristantello [mailto:matt at crazy42.org]
> Sent: Thursday, April 08, 2004 12:39 AM
> To: nflug at nflug.org
> Subject: Server Administration: automatically restarting services
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hey,
>
> I was just wondering if any of you have come across any projects to
> automatically restart crashed or broken services (such as sshd, apache,
> etc.) in linux. I have rcN.d and init.d scripts set up, but I'd like
> something to check, say every five minutes, and see if a process is
> still running/is in a good state, then restart it if it's not. I can do
> something similar using ps -A, grep, and then running the init.d script
> if necessary, but I'd like somethign a little more automatic. If nothing
> like this has been done, I'll look into writing something and releasing
> it under the GPL or something like that.
>
> Thanks,
> ~Matt
>
> - --
> ************************************************************************
> ****
> "When trouble arises and things look bad, there is always one
> individual who perceives a solution and is willing to take command.
> Very often, that individual is crazy."
> - -Dave Barry
> ************************************************************************
> ****
> ~                Matthew D. Cristantello
> ~                matt at crazy42.org
> ~                716-472-3833 (cell)
> ~                AIM: Matt977
> ************************************************************************
> ****
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