[Bug 1859649] Re: networking disruption on upgrade from 14.0.0 to 14.0.3

Rodolfo Alonso ralonsoh at redhat.com
Wed Jan 15 19:24:25 UTC 2020


Hello:

As Felipe pointed out, the compatibility layer relies on the server
side. But making a stable upgrade should not trigger this problem of
course.

The mentioned patch [1] complies with the OVO versioning rules, allowing
version downgrade (in the server side).

Is there an order in the upgrade procedure you used? According to "Rolling upgrade" section in [2]:
"""
To simplify the matter, it's always assumed that the order of service upgrades is as following:

first, all neutron-servers are upgraded.
then, if applicable, neutron agents are upgraded.
"""

Regards.

[1] https://github.com/openstack/neutron/commit/b452c508b62
[2] https://github.com/openstack/neutron/blob/master/doc/source/contributor/internals/upgrade.rst

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https://bugs.launchpad.net/bugs/1859649

Title:
  networking disruption on upgrade from 14.0.0 to 14.0.3

Status in Ubuntu Cloud Archive:
  New
Status in neutron:
  New
Status in neutron package in Ubuntu:
  Confirmed
Status in neutron source package in Disco:
  New
Status in neutron source package in Eoan:
  New
Status in neutron source package in Focal:
  Confirmed

Bug description:
  Hi,

  Not entirely sure why, but if a cloud has services running these 2
  versions of neutron (2:14.0.3-0ubuntu1~cloud0 and
  2:14.0.0-0ubuntu1.1~cloud0), networking is basically broken until
  everything is running 2:14.0.3-0ubuntu1~cloud0.

  Which causes networking disruption when not all nodes are upgraded at
  the same time.

  Thanks

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