** Also affects: linux-kvm (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-kvm (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux-kvm (Ubuntu Focal)
Importance: Undecided => Medium
** Changed in: linux-kvm (Ubuntu Focal)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1946672
Title:
Enable multicast in the "kvm" kernels
Status in cloud-images:
New
Status in linux-kvm package in Ubuntu:
New
Status in linux-kvm source package in Focal:
Fix Committed
Bug description:
I work in the OpenStack Neutron project and recently I wanted to optimize our
CI scenario jobs by using Ubuntu minimal image as guest image for some tests
(see patch
https://review.opendev.org/c/openstack/neutron-tempest-plugin/+/813195)
Unfortunately it seems that there is problem with one multicast scenario test
while using ubuntu-minimal image
(https://cloud-images.ubuntu.com/minimal/releases/focal/release/ubuntu-20.04-minimal-cloudimg-amd64.img).
The problem is that VM booted from that image don't subscribes properly to the
IGMP multicast group thus test is failing.
All works fine when image
https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img
is used in the same test.
The problem is that in the minimal image kernel linux-image-kvm (vs.
linux-image-generic in the "regular" cloud image) and that "-kvm"
image has disabled MULTICAST:
# CONFIG_IP_MULTICAST is not set
Would it be maybe possible to enable this option in the kernel used in the
"minimal" cloud images?
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