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[monit] Monitoring processes without a pidfile

From: Daniel Clark
Subject: [monit] Monitoring processes without a pidfile
Date: Mon, 21 Jul 2008 12:43:39 -0400

Is there syntax I'm missing or a "trick" to monitor a process where
the daemon does not support the use of pid files?

I've thought of wrapping the daemon in a shell script or something,
but that wouldn't work out with logrotate et all doing a "kill -HUP"
of the process (one could of course make that use the wrapper as well,
but then things start to seem really kludgey).

I guess what I'm looking for is something like the cfengine syntax for
doing this - e.g. determine if a process is running via a regexp of
the full name of the daemon and the command line it was fed.

It looks like this is currently possible with monit for stopping a
program (see example below), but not for detecting if a program is
running / seeing what its pid is.

check process mediawiki-searchd with pidfile /var/run/
  start program = "/usr/local/bin/searchd --config
  stop program = "/usr/bin/pkill -f
  if failed host port 3312 then restart
  if 5 restarts within 5 cycles then timeout

Daniel JB Clark #

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