From: Steve Litt <slitt@troubleshooters.com>
To: supervision@list.skarnet.org
Subject: Re: S6 Queries
Date: Mon, 2 Aug 2021 16:42:01 -0400 [thread overview]
Message-ID: <20210802164201.331cafaf@mydesk.domain.cxm> (raw)
In-Reply-To: <em53404023-b5de-45d0-aad2-18dd54e8a436@elzian>
Laurent Bercot said on Mon, 02 Aug 2021 19:39:47 +0000
>>I thought the way to do what the OP asked is:
>>
>>=============================
>>#!/bin/sh
>>s6-svc -u myrequirement || exit 1
>>exec mydaemon -myarg1 -myarg2
>>=============================
>
> This is not a good idea in a s6-rc installation, because it sends
>raw s6 commands, which may mess with the service state as viewed by
>s6-rc. Also, it sends control commands to a service from another
>service's run script, which is bad form in general: it is
>unintuitive that starting the mydaemon service also causes the
>myrequirement service to be started. Dependencies should be handled at
>the service manager level, not at the process supervision level.
Do you think this is any better?
=============================
#!/bin/sh
test_for_myrequirement || exit 1
exec mydaemon -myarg1 -myarg2
=============================
SteveT
Steve Litt
Spring 2021 featured book: Troubleshooting Techniques of the Successful
Technologist http://www.troubleshooters.com/techniques
next prev parent reply other threads:[~2021-08-02 20:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-02 4:54 Arjun D R
2021-08-02 8:27 ` Laurent Bercot
2021-08-02 18:07 ` Steve Litt
2021-08-02 19:39 ` Laurent Bercot
2021-08-02 20:42 ` Steve Litt [this message]
2021-08-02 21:40 ` Laurent Bercot
2021-08-11 11:05 ` Arjun D R
2021-08-11 14:21 ` Laurent Bercot
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