Public bug reported:
Description
===========
VIF unplug operations are failing on Rocky Linux 9.3 with stable/yoga.
This is caused by incompatibility between pyroute2 0.6.6 (yoga u-c) and
the Rocky Linux 9.3 kernel.
Steps to reproduce
==================
* Launch a virtual machine
* Try to resize the virtual machine
Expected result
===============
The resize operation succeeds (assuming enough resources are available).
Actual result
=============
The resize operation will fail and a similar traceback will be logged in
nova-compute:
Traceback (most recent call last):
File "/var/lib/kolla/venv/lib/python3.9/site-packages/os_vif/__init__.py",
line 110, in unplug
plugin.unplug(vif, instance_info)
File "/var/lib/kolla/venv/lib/python3.9/site-packages/vif_plug_ovs/ovs.py",
line 445, in unplug
self._unplug_bridge(vif, instance_info)
File "/var/lib/kolla/venv/lib/python3.9/site-packages/vif_plug_ovs/ovs.py",
line 376, in _unplug_bridge
linux_net.delete_bridge(vif.bridge_name, v1_name)
File
"/var/lib/kolla/venv/lib/python3.9/site-packages/oslo_privsep/priv_context.py",
line 271, in _wrap
return self.channel.remote_call(name, args, kwargs,
File
"/var/lib/kolla/venv/lib/python3.9/site-packages/oslo_privsep/daemon.py", line
215, in remote_call
raise exc_type(*result[2])
pr2modules.netlink.exceptions.NetlinkError: (95, 'Operation not supported')
Note that this was resolved in Ubuntu by backporting a fix from pyroute2
0.6.10. For more details see
https://bugs.launchpad.net/ubuntu/+source/pyroute2/+bug/1995469
We successfully reproduced the fix by backporting the following commit:
https://github.com/svinota/pyroute2/commit/1eb08312de30a083bcfddfaa9c1d5e124b6368df
Environment
===========
This should be reproducible with Nova stable/yoga at the time of writing, when
running on Rocky Linux 9.3:
5.14.0-362.8.1.el9_3.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Nov 8 17:36:32 UTC 2023
Hypervisor is KVM:
qemu-kvm-7.2.0-14.el9_2.5.x86_64
libvirt-daemon-9.0.0-10.3.el9_2.x86_64
Storage is Ceph (Quincy).
Networking is Neutron with OpenVSwitch.
** Affects: nova
Importance: Undecided
Status: New
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/2048097
Title:
VIF unplug operation failing on Rocky Linux 9.3 (Yoga)
Status in OpenStack Compute (nova):
New
Bug description:
Description
===========
VIF unplug operations are failing on Rocky Linux 9.3 with stable/yoga.
This is caused by incompatibility between pyroute2 0.6.6 (yoga u-c)
and the Rocky Linux 9.3 kernel.
Steps to reproduce
==================
* Launch a virtual machine
* Try to resize the virtual machine
Expected result
===============
The resize operation succeeds (assuming enough resources are
available).
Actual result
=============
The resize operation will fail and a similar traceback will be logged
in nova-compute:
Traceback (most recent call last):
File "/var/lib/kolla/venv/lib/python3.9/site-packages/os_vif/__init__.py",
line 110, in unplug
plugin.unplug(vif, instance_info)
File "/var/lib/kolla/venv/lib/python3.9/site-packages/vif_plug_ovs/ovs.py",
line 445, in unplug
self._unplug_bridge(vif, instance_info)
File "/var/lib/kolla/venv/lib/python3.9/site-packages/vif_plug_ovs/ovs.py",
line 376, in _unplug_bridge
linux_net.delete_bridge(vif.bridge_name, v1_name)
File
"/var/lib/kolla/venv/lib/python3.9/site-packages/oslo_privsep/priv_context.py",
line 271, in _wrap
return self.channel.remote_call(name, args, kwargs,
File
"/var/lib/kolla/venv/lib/python3.9/site-packages/oslo_privsep/daemon.py", line
215, in remote_call
raise exc_type(*result[2])
pr2modules.netlink.exceptions.NetlinkError: (95, 'Operation not supported')
Note that this was resolved in Ubuntu by backporting a fix from
pyroute2 0.6.10. For more details see
https://bugs.launchpad.net/ubuntu/+source/pyroute2/+bug/1995469
We successfully reproduced the fix by backporting the following
commit:
https://github.com/svinota/pyroute2/commit/1eb08312de30a083bcfddfaa9c1d5e124b6368df
Environment
===========
This should be reproducible with Nova stable/yoga at the time of writing,
when running on Rocky Linux 9.3:
5.14.0-362.8.1.el9_3.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Nov 8 17:36:32 UTC 2023
Hypervisor is KVM:
qemu-kvm-7.2.0-14.el9_2.5.x86_64
libvirt-daemon-9.0.0-10.3.el9_2.x86_64
Storage is Ceph (Quincy).
Networking is Neutron with OpenVSwitch.
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/2048097/+subscriptions
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