[Pkg-utopia-maintainers] Bug#806305: dbus: test suite times out on ci.debian.net

[Antonio Terceiro]

On Fri, Nov 27, 2015 at 04:11:52PM +0000, Simon McVittie wrote:
> On 26/11/15 16:11, Antonio Terceiro wrote:
> > On Thu, Nov 26, 2015 at 12:48:13PM +0000, Simon McVittie wrote:
> >> Is there a way I can reproduce the ci.debian.net environment on a local
> >> virtual machine or cluster of virtual machines, preferably jessie amd64?
> >> https://ci.debian.net/doc/file.MAINTAINERS.html currently still
> >> documents the schroot-based setup.
> > 
> > basically
> > 
> > $ sudo adt-build-lxc debian sid
> > $ adt-run dbus --- lxc --sudo adt-sid-$ARCH
> 
> I tried following those instructions, but as well as needing to upgrade
> cgmanager to the version in sid (?), adt-build-lxc seems to require
> non-default lxc configuration. The default in /etc/lxc/default.conf is
> "lxc.network.type = empty" which means it isn't going to get far with
> apt, and I have no idea which of the other options is preferred.
> 
> With lxc.network.type = macvlan I was able to get the D-Bus tests to
> run, but I get a lot more failures than ci.debian.net did, so I must
> still be doing something wrong. Note that D-Bus is multi-user IPC, so
> its tests use TCP, abstract Unix sockets, filesystem-backed Unix
> sockets, multiple uids, and the test user's home directory; this is
> perhaps exercising more of the LXC stack than the average package.
> 
> With adt-virt-qemu, everything passes until we get to the tests that run
> as root, which hang (that's this bug); that's more like what I expected.
> 
> It would be great if you could go all the way through the lxc-based
> setup in a VM or on a dedicated machine, from installation (or
> vmdebootstrap) with a specified suite and package-set to successfully
> running an autopkgtest, and document how. Alternatively, if
> ci.debian.net workers have some sort of scripting (Puppet?) that I can
> study, please point me towards that and I might be able to
> reverse-engineer instructions.
>
> Based on work I've done for $DAYJOB with CI gating acceptance, I think
> it's really important for random developers to be able to reproduce the
> test environment. schroot was quite good for that, and the combination
> of qemu and vmdebootstrap is really straightforward (assuming you have
> lots of RAM, which I do), but lxc is not something I've worked with
> before, so I'm a bit lost without documentation.

Sure, absolutely. I have updated the instructions and reproduced running
test runs starting from an empty VM following them:
https://ci.debian.net/doc/file.MAINTAINERS.html

It would be great if you could give it a try.

> The patch that I applied upstream for this particular bug is working on
> Ubuntu's armhf workers, which appear to be LXC-based... so if it works
> in my adt-virt-qemu, I'm going to upload it anyway, and ask you to
> reverse the blacklisting even though I can't actually test it in LXC.
> Hopefully that will work.

if the problem also happens under qemu, then the fix you have should do
the trick under lxc as well.

-- 
Antonio Terceiro <terceiro at debian.org>
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