| 2022-11-23 19:10:42 |
Corey Bryant |
description |
Because of this bug upstream https://github.com/svinota/pyroute2/issues/923, in the versions of pyroute2 prior to 0.6.10, all delete operations (address, link, route, ...) fail with 'Operation not supported'.
This is related to the kernel commit https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a6cec0bcd34264be8887791594be793b3f12719f
Pyroute package has to be upgraded to a version 0.6.10 or later as long as the distro comes with the kernel that contains the above commit.
Reproducer:
$ sudo python3
Python 3.10.7 (main, Sep 8 2022, 14:34:29) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from pyroute2 import IPRoute
>>> IPRoute().link("add", ifname="dum0", kind="dummy")
({'header': {'length': 36, 'type': 2, 'flags': 256, 'sequence_number': 255, 'pid': 4993, 'error': None, 'target': 'localhost', 'stats': Stats(qsize=0, delta=0, delay=0)}, 'event': 'NLMSG_ERROR'},)
>>> IPRoute().link_lookup(ifname="dum0")
[10]
>>> IPRoute().link("del", ifname="dum0")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3/dist-packages/pr2modules/iproute/linux.py", line 1489, in link
ret = self.nlm_request(msg, msg_type=command, msg_flags=msg_flags)
File "/usr/lib/python3/dist-packages/pr2modules/netlink/nlsocket.py", line 401, in nlm_request
return tuple(self._genlm_request(*argv, **kwarg))
File "/usr/lib/python3/dist-packages/pr2modules/netlink/nlsocket.py", line 906, in nlm_request
for msg in self.get(
File "/usr/lib/python3/dist-packages/pr2modules/netlink/nlsocket.py", line 404, in get
return tuple(self._genlm_get(*argv, **kwarg))
File "/usr/lib/python3/dist-packages/pr2modules/netlink/nlsocket.py", line 732, in get
raise msg['header']['error']
pr2modules.netlink.exceptions.NetlinkError: (95, 'Operation not supported')
ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: python3-pyroute2 0.6.7-3
ProcVersionSignature: Ubuntu 5.19.0-23.24-generic 5.19.7
Uname: Linux 5.19.0-23-generic x86_64
ApportVersion: 2.23.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Nov 2 10:44:29 2022
InstallationDate: Installed on 2021-08-18 (440 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: pyroute2
UpgradeStatus: Upgraded to kinetic on 2022-10-23 (9 days ago) |
[Impact]
Because of this bug upstream https://github.com/svinota/pyroute2/issues/923, in the versions of pyroute2 prior to 0.6.10, all delete operations (address, link, route, ...) fail with 'Operation not supported'.
This is related to the kernel commit https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a6cec0bcd34264be8887791594be793b3f12719f
Pyroute package has to be upgraded to a version 0.6.10 or later as long as the distro comes with the kernel that contains the above commit.
Reproducer:
$ sudo python3
Python 3.10.7 (main, Sep 8 2022, 14:34:29) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from pyroute2 import IPRoute
>>> IPRoute().link("add", ifname="dum0", kind="dummy")
({'header': {'length': 36, 'type': 2, 'flags': 256, 'sequence_number': 255, 'pid': 4993, 'error': None, 'target': 'localhost', 'stats': Stats(qsize=0, delta=0, delay=0)}, 'event': 'NLMSG_ERROR'},)
>>> IPRoute().link_lookup(ifname="dum0")
[10]
>>> IPRoute().link("del", ifname="dum0")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3/dist-packages/pr2modules/iproute/linux.py", line 1489, in link
ret = self.nlm_request(msg, msg_type=command, msg_flags=msg_flags)
File "/usr/lib/python3/dist-packages/pr2modules/netlink/nlsocket.py", line 401, in nlm_request
return tuple(self._genlm_request(*argv, **kwarg))
File "/usr/lib/python3/dist-packages/pr2modules/netlink/nlsocket.py", line 906, in nlm_request
for msg in self.get(
File "/usr/lib/python3/dist-packages/pr2modules/netlink/nlsocket.py", line 404, in get
return tuple(self._genlm_get(*argv, **kwarg))
File "/usr/lib/python3/dist-packages/pr2modules/netlink/nlsocket.py", line 732, in get
raise msg['header']['error']
pr2modules.netlink.exceptions.NetlinkError: (95, 'Operation not supported')
ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: python3-pyroute2 0.6.7-3
ProcVersionSignature: Ubuntu 5.19.0-23.24-generic 5.19.7
Uname: Linux 5.19.0-23-generic x86_64
ApportVersion: 2.23.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Nov 2 10:44:29 2022
InstallationDate: Installed on 2021-08-18 (440 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: pyroute2
UpgradeStatus: Upgraded to kinetic on 2022-10-23 (9 days ago)
[Test Case]
There is a small reproducer above that Eugene included in the bug report.
Additionally we can use the standard charm-deployed regression test suite to test kinetic-zed support. nova-compute units can be inspected to see if the 'Operation not supported' errors are no longer produced in /var/log/neutron/neutron-ovn-metadata-agent.log.
[Regression Potential]
The patch has already landed in releases of pyroute2 0.6.10 and above. Since pyroute2 is also backported to the zed cloud archive (which is on jammy) we'll need to ensure that this patch behaves as expected with jammy-zed deploys as well. |
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