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bug#39708: nfs-service-type broken: rpc.mountd respawns too quickly

From: Maxim Cournoyer
Subject: bug#39708: nfs-service-type broken: rpc.mountd respawns too quickly
Date: Sun, 08 Mar 2020 10:37:45 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)

Hello Ludovic!

Ludovic Courtès <address@hidden> writes:

> Hi!
> Maxim Cournoyer <address@hidden> skribis:
>> I think I've gathered a clue!
> [...]
>> scheme@(shepherd service)> (make-forkexec-constructor
>>   (list 
>> "/gnu/store/qyz1bncxlkxv44c03sva2akfsyqzkzh5-nfs-utils-2.4.2/sbin/rpc.mountd"
>>  "--debug" "all"))
>> $5 = #<procedure 7f67f82862a0 at shepherd/service.scm:930:8 args>
>> scheme@(shepherd service)> ($5)
>> $6 = 816
>> scheme@(shepherd service)> (system "pidof rpc.mountd")
>> warning: 'waitpid' -1 failed unexpectedly: No child processes
>> 817
> So that means that rpc.mountd “daemonizes”.  Thus, shepherd shouldn’t
> look at the PID of the process it spawns, but rather at what
> rpc.mountd’s PID file contains (I assume it creates a PID file,
> right?).  IOW, we need to pass #:pid-file to ‘make-forkexec-constructor’.

That process doesn't create a PID file, so that doesn't work.

> Does that work for you?
> Thanks for debugging!

Thanks for assisting, and for adding a note to the Shepherd manual! :-)

I'm closing this issue.


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