[Bug 1995469] Re: Version 0.6.7-3 is broken for "del" operations on recent kernels

[DUFOUR Olivier]

Workaround to manually install the python3-pyroute2 packages from the
Archive tracker on Jammy-Zed seems to fix temporarily the issue as well

To download the packages from one machine with Zed repository enabled on
Jammy :

for package in $(apt search python3-pyroute2 2>/dev/null | grep installed | cut -f 1 -d '/'); do apt download $package; done
$ ls pyroute2/ -l
total 432
-rw-r--r-- 1 ubuntu ubuntu 171920 Feb 20 05:33 python3-pyroute2.core_0.6.7-3ubuntu1~cloud0_all.deb
-rw-r--r-- 1 ubuntu ubuntu  23300 Feb 20 05:33 python3-pyroute2.ethtool_0.6.7-3ubuntu1~cloud0_all.deb
-rw-r--r-- 1 ubuntu ubuntu  52456 Feb 20 05:33 python3-pyroute2.ipdb_0.6.7-3ubuntu1~cloud0_all.deb
-rw-r--r-- 1 ubuntu ubuntu  25964 Feb 20 05:33 python3-pyroute2.ipset_0.6.7-3ubuntu1~cloud0_all.deb
-rw-r--r-- 1 ubuntu ubuntu  66530 Feb 20 05:33 python3-pyroute2.ndb_0.6.7-3ubuntu1~cloud0_all.deb
-rw-r--r-- 1 ubuntu ubuntu  20944 Feb 20 05:33 python3-pyroute2.nftables_0.6.7-3ubuntu1~cloud0_all.deb
-rw-r--r-- 1 ubuntu ubuntu  24546 Feb 20 05:33 python3-pyroute2.nslink_0.6.7-3ubuntu1~cloud0_all.deb
-rw-r--r-- 1 ubuntu ubuntu  21990 Feb 20 05:33 python3-pyroute2.protocols_0.6.7-3ubuntu1~cloud0_all.deb
-rw-r--r-- 1 ubuntu ubuntu  18656 Feb 20 05:33 python3-pyroute2_0.6.7-3ubuntu1~cloud0_all.deb

Install all the following packages on all nova-computes :
for i in {0..2}; do juju scp -- -r ./pyroute2 $i:~/ ; juju ssh $i sudo dpkg -i ./pyroute2/* ; done
juju run -a nova-compute systemctl restart neutron-ovn-metadata-agent.service

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https://bugs.launchpad.net/bugs/1995469

Title:
  Version 0.6.7-3 is broken for "del" operations on recent kernels

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive zed series:
  Fix Released
Status in pyroute2 package in Ubuntu:
  Fix Released
Status in pyroute2 source package in Kinetic:
  Fix Released

Bug description:
  [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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