Re: patch: sv check should wait when svrun is not ready

From: Avery Payne <avery.p.payne_at_gmail.com>
Date: Mon, 16 Feb 2015 16:48:25 -0800

On 2/16/2015 3:56 PM, Colin Booth wrote:
> If you are running the sv check within a dependent service's run
> script that was spawned first, the script will fail and runsv will
> respawn it, with the call eventually succeeding once the required
> service is up.
>
> If you're calling this from a daemon script that is outside of the
> general supervision framework, you'll need to write a simple wait loop
> in shell to wrap the sv call similar to what Case suggested.
A third option is to loop the list of "child" dependencies and perform
the check for each one. If a check returns a failure, then fail the
"parent" script and let the supervisor restart it. You can then have
./finish inject a quick message into the log about the failure.
Received on Tue Feb 17 2015 - 00:48:25 UTC