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From: Gerrit Pape <pape@smarden.org>
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Subject: Re: runit/dependencies
Date: Sat, 8 May 2004 17:22:00 +0000
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On Thu, May 06, 2004 at 07:53:31PM -0700, Kevin P. Fleming wrote:
> I've been exploring the daemontools/runit/simpleinit/minit world, and I 
> want dependency handling too. However, I want something that I've not 

I'm still curious about an example.  What's the problem that dependency
handling should solve?  What's wrong with?:
 http://smarden.org/runit/dependencies.html

> come across yet, but seems terribly logical to me: if runsv is managing 
> a service, and that service dies, and then dies again when runsv tries 
> to start it (say, 3 times), then runsv should stop trying to start it 

As Alex Efros said, you can do this through the ./finish script.  E.g.:
If ./finish is started the first time, save the time; if started again
within 5 seconds, sleep 2 seconds; if started again within 5 seconds,
sleep 4 seconds; if started again within 5 seconds, run `runsvctrl down .`.
Do you have an example where such a behavior does any good?

> _AND_ anything that's dependent on it should be told to shutdown.

You could use symlinks to save dependency informations: link the service
directories of the dependent services into ./dependents/ and run
`runsvctrl term ./dependents/*`, or `runsvctrl down ./dependents/*`, in
./finish.

Regards, Gerrit.