user/dev discussion of public-inbox itself
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From: Eric Wong <e@80x24.org>
To: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Cc: meta@public-inbox.org
Subject: Re: Restarting daemons on config file change
Date: Mon, 19 Jul 2021 20:49:35 +0000	[thread overview]
Message-ID: <20210719204935.GA31835@dcvr> (raw)
In-Reply-To: <20210719200318.wo4ydjonc3u3ibtu@nitro.local>

Konstantin Ryabitsev <konstantin@linuxfoundation.org> wrote:
> Hello:
> 
> Something I stumbled on today is the need to have the -httpd and -nntpd
> daemons reread the config file after we've mirrored and initialized new
> inboxdirs. The situation is:

Correct, config files are read once at startup.

> - public-inbox-{httpd,nntpd} are running as systemd services as user
>   "publicinbox"
> - the mirroring and initialization/indexing is done as user "mirror", so we
>   can't send a HUP to the daemon processes

I seem to recall HUP having some trouble with -httpd (and less
so with nntpd/imapd); or at least that's what -daemon(8) manpage
alludes to...

I usually just swap between "@foo" and "@bar" systemd units, but I
restart more often for code changes than config file changes.

> The best I can think of is a systemd watcher service that automatically
> restarts the daemons when the config file is modified, but I wanted to check
> here first to see if perhaps I'm missing something simpler.

Yes, a systemd.path unit might be the way to go.  A patch for
examples/ would be appreciated if you go down that route :>

  reply	other threads:[~2021-07-19 20:49 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19 20:03 Restarting daemons on config file change Konstantin Ryabitsev
2021-07-19 20:49 ` Eric Wong [this message]
2021-07-20  8:58   ` [PATCH] httpd: fix SIGHUP by invalidating cache on reload Eric Wong
2021-07-20 17:00   ` Restarting daemons on config file change Konstantin Ryabitsev
2021-07-20 20:34     ` Eric Wong
2021-07-20 20:49       ` Konstantin Ryabitsev
2021-07-20 21:07         ` Eric Wong
2021-07-20 21:18           ` Konstantin Ryabitsev
2021-07-21 14:05             ` [PATCH 1/2] extsearch: support publicinbox.*.boost parameter Eric Wong
2021-07-21 14:05             ` [PATCH 2/2] init: allow arbitrary key-values via -c KEY=VALUE Eric Wong
2021-07-25 10:40               ` [PATCH 3/2] init: support git <2.30 for "-c KEY=VALUE" args Eric Wong
2021-07-21 15:32             ` [PATCH 0/2] things to make mirroring easier Konstantin Ryabitsev

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