supervision - discussion about system services, daemon supervision, init, runlevel management, and tools such as s6 and runit
 help / color / mirror / Atom feed
From: billa chaitanya <billachaitanya@gmail.com>
To: Laurent Bercot <ska-supervision@skarnet.org>
Cc: supervision@list.skarnet.org
Subject: Re: writing s6 services
Date: Tue, 3 Nov 2020 17:18:16 +0530
Message-ID: <CAH9hU4+789eeBzC52YMfF_3i7m=2CnnGFgka-DUGZjkL3UA1YA@mail.gmail.com> (raw)
In-Reply-To: <em0094f017-01ed-4ef8-ac43-4cf2adc58a58@elzian>

[-- Attachment #1: Type: text/plain, Size: 1306 bytes --]

On Wed, Oct 28, 2020 at 7:31 PM Laurent Bercot <ska-supervision@skarnet.org>
wrote:

> >1) Is there a possibility to add an ENV variable dynamically?
> >I have a shell script which fills out some variables like
> >IPADDRESS, SERVER  etc .. which I need to use in starting a process later
> >as part of starting a service/stopping a service.
>
>   You can do whatever you want in a run script, as long as by the end
> of it, the pid of the long-running daemon is the pid your run script
> was started as.
>   If your run script is a shell script, you can absolutely source the
> script that fills out your environment variables. It is not the most
> idiomatic or safe way to do it, but it will absolutely work.
>
>
> >2) Does s6-supervise has the intelligence of findingout $MAINPID as the
> >systemd does?(
> >
> https://systemd-devel.freedesktop.narkive.com/dpY7US7K/a-little-help-with-mainpid-please
>
>   Yes, that is the point of a process supervisor.
>   You don't need a variable such as $MAINPID because the supervisor
> always
> remembers the pid of its child. You don't need a pidfile or anything of
> the sort.
>                So, Is there any variable we can use inside run or finish
> script of a service equivalent to the pid of the  process started inside
> run script?
> --
>   Laurent
>
>

  reply	other threads:[~2020-11-03 11:48 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-28  8:01 billa chaitanya
2020-10-28 14:01 ` Laurent Bercot
2020-11-03 11:48   ` billa chaitanya [this message]
2020-11-03 16:54     ` Guillermo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAH9hU4+789eeBzC52YMfF_3i7m=2CnnGFgka-DUGZjkL3UA1YA@mail.gmail.com' \
    --to=billachaitanya@gmail.com \
    --cc=ska-supervision@skarnet.org \
    --cc=supervision@list.skarnet.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

supervision - discussion about system services, daemon supervision, init, runlevel management, and tools such as s6 and runit

This inbox may be cloned and mirrored by anyone:

	git clone --mirror http://inbox.vuxu.org/supervision

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 supervision supervision/ http://inbox.vuxu.org/supervision \
		subscribe@list.skarnet.org
	public-inbox-index supervision

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.vuxu.org/vuxu.archive.supervision.general


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git