Date: Sun, 4 Oct 2020 09:09:21 +1100 From: Dewayne Geraghty <dewayne@heuristicsystems.com.au> To: freebsd-questions@freebsd.org, Jerry <jerry@seibercom.net> Subject: Re: Monitor an app Message-ID: <69ec859f-163d-2908-7e34-bc3d1c8d3381@heuristicsystems.com.au> In-Reply-To: <20201002075125.000001d6@seibercom.net> References: <65C3BE67-3389-4F8E-9975-7EC0714FB056@kreme.com> <20201002075125.000001d6@seibercom.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2/10/2020 9:51 pm, Jerry wrote: > On Fri, 2 Oct 2020 04:59:59 -0600, @lbutlr commented: >> Are there any tools that monitor apps or services and do sane things >> to make sure that the series are running? >> >> Obviously, I can write a simple script that says something like "if >> service <name> status doesn't have a PID, then …" but that's >> simplistic and I don't want something that is simply going to restart >> a failed service over and over every time it crashes. (But once or >> twice when it crashes is good, with an escalation to maybe restart a >> different series and a fall back from that to restart the machine… but >> again, not restarting the machine a few seconds after boot because it >> can't start the service.) >> >> I am not looking for something that says "hey, email is not working" >> (I already have that but more subtly like "Hey, dovecot isn't running" >> or "MySQL isn't running". >> >> Googling leads me to external monitoring of forward facing services >> based on port scanning, I'm looking for something local to the machine. > > Have you considered "/sysutils/monit" or one of its cousins? It might > do what you want. It an be configured to limit the number of times it > will attempt to restart a program, and lots of other things too. > I've used monit for a few years and its VERY helpful. Though, for the reason that you reference managing applications via PID, I've also incorporated s6 and s6-rc to manage services (and hence eliminate reliance upon a PID). monit is very easy to learn and should do most of what you want, s6 and friends have a steep learning curve. (If you choose the latter, the gentoo website has an excellent guideline) Cheers. PS port scanning is like penetration testing - last resort for technical folks, yet often mandated by management ;)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?69ec859f-163d-2908-7e34-bc3d1c8d3381>