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Re: Re: Bug#1059995: pdns: flaky autopkgtest (host dependent): pdns.service: Failed to set up IPC namespacing: Resource temporarily unavailable



Hi Paul,

* Paul Gevers <elbrus@debian.org> [240104 18:14]:
> Can you figure out decent numbers for these? Below I printed the output of
> lsipc and AFAICT SHMMAX is already pretty big ;) (and the same on all our
> hosts, which is also true for MSGMAX).
> 
> On the other hand, $(ipcs -a) doesn't show anything on the host, not even if
> I let it run in a while-loop (1 second interval) while I schedule the test
> of pdns. So, could this be a bug in systemd (which you claim below should be
> handeling this) or is this just not really supported in lxc and do you need
> a full VM. Because it works elsewhere, I feel more like a bug, and it would
> not be the first instance where code fails to properly handle 64 cores or
> 256GB or RAM.

Likely, but it is probably in systemd or in lxc or in apparmor or
elsewhere.

> > > > I wouldn't know what to do about this, its not really under the
> > > > control of src:pdns.
> > > 
> > > Well, maybe check for it and fail gracefully?
> > 
> > But how? systemd sets up the IPC namespace.
> 
> exit with 77 when you detect problems and add the skippable restriction.

I see this "works", but now the tests fail after one try on the
problematic worker and then are never retried. Can this please be
fixed?

Thanks,
Chris


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