From: "Serge E. Hallyn" <serge@hallyn.com>
To: Laurent Bercot <ska-supervision@skarnet.org>
Cc: Supervision <supervision@list.skarnet.org>
Subject: Re: Readiness notification exemplars
Date: Sat, 4 Apr 2020 17:18:11 -0500 [thread overview]
Message-ID: <20200404221811.GA4299@mail.hallyn.com> (raw)
In-Reply-To: <em4d97f6cd-5c35-44b8-aaaa-87b68f308491@elzian>
On Sat, Apr 04, 2020 at 09:29:04PM +0000, Laurent Bercot wrote:
>
> > Yes it sounds like I completely misread the earlier emails, sorry about
> > that. Now, looking at http://skarnet.org/software/s6/notifywhenup.html,
> > I'm probably not reading that quite right, but it seems to tie the
> > proposal to the 'notifcation-fd' file in the service directory, making
> > it a bit less general.
>
> The notification-fd file is for s6-supervise, i.e. s6's implementation
> of a supervisor. It is meant to make the fd number configurable on the
> supervisor side, to allow daemons to use whatever fd they choose.
>
> On the daemon side, you can use any option you like to tell the daemon
> what fd it should write to. It has nothing to do with s6, and I have no
> recommended policy for daemons.
>
>
> > s6-log however uses the -d argument to pass the
> > fd, so I'll go with that.
>
> -d works for s6-log and a few others of my programs. For others, -d
> is already used for something else, so I use another option.
> I really suggest you don't try to standardize a way to tell daemons
> what fd to use. No method will be universal, there will always be
> some obscure daemon that will conflict with it.
>
Right, I didn't mean -d specifically :) I just meant pass the fd# as
a command line argument.
thanks,
-serge
next prev parent reply other threads:[~2020-04-04 22:18 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-01 13:23 Brett Neumeier
2020-04-01 13:36 ` Casper Ti. Vector
2020-04-01 14:21 ` Serge E. Hallyn
2020-04-01 15:06 ` Laurent Bercot
2020-04-01 15:28 ` Serge E. Hallyn
2020-04-01 15:59 ` Laurent Bercot
2020-04-01 16:26 ` Serge E. Hallyn
2020-04-01 17:13 ` Laurent Bercot
2020-04-04 15:02 ` Serge E. Hallyn
2020-04-04 15:54 ` Laurent Bercot
2020-04-03 7:41 ` Jonathan de Boyne Pollard
2020-04-04 15:48 ` Serge E. Hallyn
2020-04-04 21:29 ` Laurent Bercot
2020-04-04 22:18 ` Serge E. Hallyn [this message]
2020-04-07 23:03 ` Brett Neumeier
2020-04-08 11:02 ` Laurent Bercot
2020-04-09 10:31 ` Jonathan de Boyne Pollard
2020-04-01 14:55 ` Laurent Bercot
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