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Re: Monit switches to "not monitored" state occasionally

From: Martin Pala
Subject: Re: Monit switches to "not monitored" state occasionally
Date: Fri, 13 Jan 2012 15:01:47 +0100

On Jan 13, 2012, at 2:45 PM, Johannes Bauer wrote:

> Hi Martin,
> On 13.01.2012 14:16, Martin Pala wrote:
>> you should check the monit logs - it will show why the service monitoring 
>> was disabled (whether it was some manual action, etc.).
> Well, monit is configured to log to syslog:
> set logfile syslog facility log_daemon
> And I can see that there are messages when monit starts, that the
> control file syntax is okay, but that's it. There's no indication
> whatsoever why the processes are in the unmonitored state -- this is
> actually why I'm asking: because the logs do not show anything out of
> the ordinary yet monit put all processes in the "unmonitored" state.
> Is there any automatic action which would cause monit to put a monitored
> child into "unmonitored" autonomically? If so, how can this mechanism be
> disabled?

There are two possible ways how the service can get unmonitored automatically:

1.) when the "if <x> restarts within <y> cycles then timeout" statement is 
used, the monit will unmonitor the service if this condition matches

2.) when you use dependency ("depends on <service>") and the parent service is 
stopped/unmonitored (aither via the timeout statement or manually by admin) - 
then the stop/unmonitor action cascades to the child services too.

Also Monit <= 5.2.5 *temporarily* displayed "Not monitored" while the service 
restart was pending - the monitoring state returned back to "Monitored" when 
the restart finished … this was fixed in Monit 5.3 as it was confusing and it 
displayes "Monitored" during restart too.

If none of the above cases matches your configuration, the most probable cause 
is, that somebody manually unmonitored/stopped the service via Monit.


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