uvt-kvm fails to create armhf VM

[Andrea Righi]

[Impact]

uvt-kvm is always failing to create armhf VMs.

[Test case]

$ uvt-simplestreams-libvirt --verbose sync --source http://cloud-images.ubuntu.com/daily release=jammy arch=armhf
$ uvt-kvm create --guest-arch armhf --cpu 4 --memory 4096 --disk 32 mytestvm release=jammy arch=armhf

The VM can't be created and the last command returns the following error:

 uvt-kvm ps2 is not supported by this QEMU binary

[Fix]

The ps2 bus is not available on armhf, this is why qemu is complaining about it.

I fixed this manually by removing the following line from the armhf xml template (/usr/share/uvtool/libvirt/template-emu-armhf.xml):

 <input type='mouse' bus='ps2'/>

We should just remove this line from the default armhf libvirt template.

[Andrea Righi (arighi)]

debdiff in attach seems to fix the problem for me.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andrea Righi (arighi)]

Fix also pushed here: https://git.launchpad.net/~arighi/uvtool (branch master)

[Christian Ehrhardt  (paelzer)]

Hi Andrea,
thanks for the bug and fix.

This worked in the past with older/other qemu binaries.
I double checked my memory on this, but it indeed works.

#1 Focal with qemu 4.2

ubuntu@node-horsea:~$ uvt-simplestreams-libvirt --verbose sync --source http://cloud-images.ubuntu.com/daily arch=armhf label=daily release=jammy
Adding: com.ubuntu.cloud.daily:server:22.04:armhf 20220104
ubuntu@node-horsea:~$ sudo uvt-kvm create --guest-arch armhf --memory 2048 --cpu 2 --password ubuntu j-armhf arch=armhf release=jammy label=daily
Warning: using --password from the command line is not secure and should be used for debugging only.
Warning: '/root/.ssh/id_rsa.pub' not found; instance will be started with no ssh access by default.
ubuntu@node-horsea:~$ virsh list
 Id Name State
-------------------------
 1 j-armhf running

#2 Focal with qemu 6.0 from server-backports

$ uvt-simplestreams-libvirt --verbose sync --source http://cloud-images.ubuntu.com/daily arch=armhf label=daily release=jammy
Adding: com.ubuntu.cloud.daily:server:22.04:armhf 20220104
Removing: com.ubuntu.cloud.daily:server:22.04:armhf 20211127
$ sudo uvt-kvm create --guest-arch armhf --memory 2048 --cpu 2 --password ubuntu j-armhf arch=armhf release=jammy label=daily
[sudo] password for paelzer:
Warning: using --password from the command line is not secure and should be used for debugging only.
$ virsh list
 Id Name State
-------------------------
 2 j-armhf running

#3 New jammy VM (qemu 6.0)

ubuntu@j:~$ uvt-simplestreams-libvirt --verbose sync --source http://cloud-images.ubuntu.com/daily arch=armhf label=daily release=jammy
Adding: com.ubuntu.cloud.daily:server:22.04:armhf 20220104
ubuntu@j:~$ sudo uvt-kvm create --guest-arch armhf --memory 256 --cpu 1 --password ubuntu j-armhf arch=armhf release=jammy label=daily
Warning: using --password from the command line is not secure and should be used for debugging only.
Warning: '/root/.ssh/id_rsa.pub' not found; instance will be started with no ssh access by default.
uvt-kvm: error: libvirt: unsupported configuration: ps2 is not supported by this QEMU binary

Ok, so it really is only relevant in the new Ubuntu releases (any my memory was not wrong).

I agree that we do not need the ps2 mouse there and probably can merge it as suggested (well, jammy first, then for impish - usual SRU flow).

[Robie Basak (racb)]

Committed to uvtool main (and renamed from master while I was there). Thanks!

[Brian Murray (brian-murray)]

Ubuntu 21.10 (Impish Indri) has reached end of life, so this bug will not be fixed for that specific release.