Server Administration: automatically restarting services

[Matt Cristantello]

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Thanks for the ideas -- I'll look into BigBrother/Sister over the
weekend if I get a chance.

I have some scripts right now that look like this--

#!/bin/sh

ps -A | grep -v sshdassert | grep sshd > /dev/null || /etc/init.d/ssh start

I was hoping to find something that would pick up on dead processes,
etc. I'll see if BigBrother can do that.

Thanks!
~Matt

Mark Musone wrote:
| Another trick (if it's not a daemonizing process) is to simply put it in
| the /etc/inittab as a respawn entry. Doing that will make init always
| keep the process running, and will restart it automagically when it
| stops running..
|
|
|
| -----Original Message-----
| From: owner-nflug at nflug.org [mailto:owner-nflug at nflug.org] On Behalf Of
| Dennis Ruzeski
| Sent: Thursday, April 08, 2004 8:26 AM
| To: nflug at nflug.org
| Subject: RE: Server Administration: automatically restarting services
|
| 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
|
| 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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****************************************************************************
"There are many ways of going forward, but only one way of standing
still."
- -Franklin D. Roosevelt
****************************************************************************
~                Matthew D. Cristantello
~                matt at crazy42.org
~                716-472-3833 (cell)
~                AIM: Matt977
****************************************************************************
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