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Re: [monit] Resetting Checksums

From: Art Age Software
Subject: Re: [monit] Resetting Checksums
Date: Thu, 28 Aug 2008 10:13:33 -0700

> 1) If you are monitoring the checksum of a file, it's, IMHO, for monitoring
> if someone makes changes on this file, isn'it  ? (Personnally, I don't
> monitor a checksum on a file subject to changes, so Monit do what I expect
> of it by default). Then, if you change something, monit will trigger an
> alert. But, if you want, I think you can use exec in order to stop/start
> this service with a script.
> In this case, your checksum will be regenerate (I don't have access to a
> sandbox for tests with monit, so please check it)

I think I wasn't clear in my initial question. Yes, I want monit to
alert me if the checksum changes due to an unauthorized change to a
file. But sometimes I need to update the file myself. For example, I
have monit monitoring its own config file monit.conf. Sometimes, I add
a new service to monitor in monit.conf. So I want to "reset" monit's
monitoring of this file so that it will rechecksum and monitor the
updated file. Make sense?

> 2) Create a script for initialisation. Something like :
> monit -g <group name> monitor all
> You can unmonitor with : monit -g <group name> unmonitor all.
> If you run a script, which do :
> /etc/init.d/monit start
> monit -g <group name> monitor all
> Then, you can run all your service at startup.

I am not concerned with startup. The correct thing happens at startup
as the manual mode processes are started by heartbeat. However, if I
want to restart monit - but not heartbeat - then the manual mode
processes won't get monitored after restarting monit. This is the
problem I am trying to solve.


> Regards,
> On Thu, Aug 28, 2008 at 4:43 AM, Art Age Software <address@hidden>
> wrote:
>> Hi,
>> A couple monit questions:
>> 1. Let's say I have monit monitoring the checksum of a file. I then
>> make a change to the file which invalidates the checksum. What is the
>> recommended way to tell monit to regenerate the checksum so that it
>> does not alert and unmonitor the file, but causing the least impact.
>> So far, the only thing that has worked for me has been to kill and
>> restart monit itself.
>> 2. When I restart monit, any "mode manual" services that were
>> monitored become unmonitored after restart. Is there any way to
>> restart monit and have it resume monitoring all the services it had
>> been monitoring prior to restarting, including "mode manual" services?
>> Thanks for any ideas.
>> --
>> To unsubscribe:
> --
> Pierrick Grasland
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