Public bug reported:
While trying out multipass (edge) on s390x I ran into an issue using LXD 4.6
with KVM on s390x.
I verified that it's independent from multipass.
Launching a plain KVM virtual machine with LXD, the VM reached the 'running'
state, but the network didn't came up.
After digging a bit deeper I figured out that this is most likely due to a
mismatch of the used interface names.
The KVM virtual machine that's created shows an interface name (enc9) in 'ip
a', but that doesn't fit to the interface name in
'/etc/netplan/50-cloud-init.yaml' (enp5s0), hence the interface does not
automatically come up, hence no network (, hence multipass fails).
Please see attached file for further details and steps to reproduce.
It's assumed that this is most likely an issue with the Cloud image(s) (rather
than with LXD itself). The Cloud images include a template that generates the
netplan configuration (including the hardcoded enp5s0 interface).
But for s390x, the only architecture that usually does not have fixed-address
PCI-based names (but it can have, in case of RoCE / SMC adapters are
installed), interface 'enc9' needs to be used. So an architecture check might
be needed here.
** Affects: cloud-images
Importance: High
Assignee: Ubuntu Cloud Images (cloudimages)
Status: New
** Affects: ubuntu-z-systems
Importance: High
Status: New
** Tags: s390x
** Attachment added: "lxd_with_KVM_on_s390x_-_28.09.2020.txt"
https://bugs.launchpad.net/bugs/1897615/+attachment/5415019/+files/lxd_with_KVM_on_s390x_-_28.09.2020.txt
** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Package changed: ubuntu => cloud-images
** Changed in: ubuntu-z-systems
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1897615
Title:
LXD / KVM cannot bring up network due to network interface mismatch
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