Re: [PATCH v3 5/7] CI: avoid repacking initrd as part of the test job

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

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On Sat, Apr 12, 2025 at 03:05:13PM +0100, Andrew Cooper wrote:
> On 11/04/2025 9:32 pm, Marek Marczykowski-Górecki wrote:
> > @@ -28,16 +28,15 @@ cd initrd
> >  find . | cpio --create --format='newc' | gzip > ../initrd.cpio.gz
> >  cd ..
> >  
> > -# initrd.tar.gz is Dom0 rootfs
> > +# Dom0 rootfs - overlay on top of rootfs.cpio.gz
> >  mkdir -p rootfs
> >  cd rootfs
> > -tar xvzf ../initrd.tar.gz
> >  mkdir proc
> >  mkdir run
> >  mkdir srv
> >  mkdir sys
> > -rm var/run
> 
> I'm not sure why we need to make proc, run, srv, sys in the overlay
> image, but this is repeated everywhere.
> 
> srv is just a plain empty dir.  It's missing from $PATHS in the rootfs
> generation, so that's easy.

srv is indeed likely not needed, but there is enough changes here
already.

> proc, run and sys are more complicated, because we don't want to simply
> copy them from the rootfs generation environment.

As for those mountpoints, they looks to be necessary - in a job that
failed to unpack this overlay part, openrc failed to mount those
filesystems and crashed rather badly (especially without /run...).
I'm not sure if that's something that is missing in the base archive, or
is a problem for another reason, but it seems to be necessary to have it
here, at least without changes elsewhere.
Looking at PATHS in alpine-rootfs.sh they may be simply skipped there.

> dev is also in the same boat, and what we do now seems to cause openrc
> not to seed it normally, which seems unwise.

It mounts devtmpfs there anyway, no?

> I'll see what I can do to clean this all up.
> 
> > diff --git a/automation/scripts/xilinx-smoke-dom0-x86_64.sh b/automation/scripts/xilinx-smoke-dom0-x86_64.sh
> > index 4db249530823..52a0e05e3f1b 100755
> > --- a/automation/scripts/xilinx-smoke-dom0-x86_64.sh
> > +++ b/automation/scripts/xilinx-smoke-dom0-x86_64.sh
> > @@ -80,6 +80,7 @@ argo-exec -l -p 28333 -- /bin/echo
> >  "
> >  copy_dom0_files ()
> >  {
> > +    mkdir -p root usr/local/lib
> >      cp "${WORKDIR}/binaries/xen-argo.ko" "root/"
> >      cp -ar "${WORKDIR}/binaries/lib/"* "usr/local/lib/"
> >      cp "${WORKDIR}/binaries/argo-exec" "usr/local/bin/"
> 
> This would be better based on top of my patch to switch to the new argo,
> at which point it will simply be to append argo.cpio.gz.
> 
> ~Andrew

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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