Re: Monit dependency problem (bug?)

[drich]

Eric, your reply gave me an idea that I seems to be working. I split my check so that I have a status check for apache and one that only deals with starting/stopping ospf. While I think it's ugly, it appears to do the right thing.

# Special check to shut down ospfd if apache down
check process apache_ospf with pidfile /var/run/httpd.pid
  if does not exist
    then exec "/bin/bash -c 'if [ ! -f /tmp/monit.apachedown ]; then touch /tmp/monit.apachedown; /usr/bin/monit stop ospfd; fi'"
    else if recovered then exec "/bin/bash -c 'rm /tmp/monit.apachedown && /usr/bin/monit monitor ospfd'"
  group ospf
  depends on apache

check process apache with pidfile /var/run/httpd.pid
  start program = "/etc/init.d/httpd start"
  stop program  = "/etc/init.d/httpd stop"
  if failed host localhost port 80 protocol http
     and request "/" then restart
  if children > 50 then restart
  if 2 restarts within 2 cycles then timeout
  group server

I still need to run a few tests to make sure this catches all of the possible failures, but so far so good! It's still a bit chattier than I would like, but that's because I have a "monit monitor server" in my ospfd start script to make sure it can't get started w/o everything else running.

Thanks everyone for the replies, and I look forward to a day when dependencies are "hard" so I can get rid of all of my crufty configs! :)

On 14.12.2011 10:18, Eric Pailleau wrote:

> Hi,
> I mean you may split socket and pidfile monitoring in two parts :
>
> check host apache_80 with address 127.0.0.1
>          start program = "/etc/init.d/httpd start"
>          stop  program = "/etc/init.d/httpd stop"
>          if failed port 80 protocol http with timeout 30 seconds then restart
>          if 2 restarts within 2 cycles then timeout
>
> check process apache_pid with pidfile /var/run/httpd.pid
> 	blahblah ...
>
> Regards.
>
> Le 14/12/2011 19:01, Daniel Rich a écrit :
> > That's already in there -- that's what is bothering me. I have the port 80 check on localhost that is supposed to trigger a restart but it isn't triggering. If that doesn't trigger then neither will the "if 2 restarts within 2 cycles" block. I even tried changing the order by moving the localhost port 80 check before the "does not exist" check, but that makes no difference. check process apache with pidfile /var/run/httpd.pid start program = "/etc/init.d/httpd start" stop program = "/etc/init.d/httpd stop" if does not exist then exec "/bin/bash -c 'if [ ! -f /tmp/monit.apachedown ]; then touch /tmp/monit.apachedown; /usr/bin/monit stop ospfd; fi'" else if recovered then exec "/bin/bash -c 'rm /tmp/monit.apachedown&& /usr/bin/monit monitor ospfd'" if failed host localhost port 80 protocol http and request "/" then restart if children> 50 then restart if 2 restarts within 2 cycles then timeout group server depends on tomcat On Dec 14, 2011, at 00:30, Eric Pailleau wrote:
> > > Hello, In addition to pidfile check, you may add a tcp 80 (or another depending what apache is binding) check, or better a http page check (check host not in the pidfile paragraph). This will better check that your apache is up and running. This way you can do a simple apache restart on the second check ? But be carefull on dependencies. regards. -- To unsubscribe: https://lists.nongnu.org/mailman/listinfo/monit-general
> > Dan Rich<address@hidden> | http://www.employees.org/~drich/ | "Step up to red alert!" "Are you sure, sir? | It means changing the bulb in the sign..." | - Red Dwarf (BBC) -- To unsubscribe: https://lists.nongnu.org/mailman/listinfo/monit-general
> -- Salutations - Best regards - mit freundlichen Grüssen ----------------- address@hidden ------------------------------------ fr - Merci d'utiliser cette addresse pour le support ou question technique en - Please use this address for any support or technical question ----------------- https://support.numlog.fr -------------------------------- fr - Privilégier la gestion de ticket d'incident (Clients NUMLOG) en - Prefere our trouble ticket application (NUMLOG's customers) -- To unsubscribe: https://lists.nongnu.org/mailman/listinfo/monit-general

 

--

Dan Rich <address@hidden>

http://www.employees.org/~drich/
"Step up to red alert!" "Are you sure, sir?
It means changing the bulb in the sign..."
      - Red Dwarf (BBC)