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I am setting up a server and have just installed "monit" to monitor processes and restart them (and alert me) when certain conditions are met. It works great.

My question is what happens when monit itself dies? Is there a correct way of ensuring that monit restarts itself when it dies? I currently have it restarting (even if it's already running) via a cron job but that doesn't seem very elegant.

What is considered the correct way to restart monit? I'm using Debian and installed it via apt-get (thus I have an /etc/init.d/monit script available). I have ensured it runs using the default levels using update-rc.d.

Thanks!

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The Monit daemon doesn't really die.

Why do you assume it would?

Either way, the Monit service is managed by Puppet on my systems. But it's mainly to reload the service when I make configuration file changes.

  service { $monit_svc:
    ensure    => 'running',
    enable    => true,
    restart   => 'monit reload',
    subscribe => File[$monit_conf],
  }

While I don't advocate this, it is possible to run Monit from init. But the software is stable. This should not be necessary.

| improve this answer | |
  • monit probably won't die, but what happens if it does and I didn't plan for it? My site goes down. I don't use Puppet so that unfortunately won't work in my case. – Phil Apr 22 '15 at 3:14
  • Monit doesn't die... at least it hasn't in my 7 years of experience with it. While I don't think you should worry about this, your concern is address in the documentation. – ewwhite Apr 22 '15 at 3:30
  • I've actually already followed those steps but it still doesn't return. If it is in fact meant to, then something else might be wrong. – Phil Apr 22 '15 at 3:32
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    Actually, monit can die/be killed. It have happened to me on numerous occasions when a host has run out of RAM+swap. To be honest, this is in a fairly large server park. – Aron Cederholm Oct 15 '15 at 13:29
  • @AronCederholm That's probably a situation that the people monitoring Monit or the systems should have resolved. I'd say it's an edge case. – ewwhite Oct 15 '15 at 13:31

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