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charm-guide
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Release note: Enforce MTU size between Octavia networks 

Add release note for change in behaviour of MTU with the Octavia charm
for health manager port and load balancer network.

Change-Id: I47e0209ad9b6be4b626fdd137a547a46c99fe6a5
Related-Bug: #2018998
This commit is contained in:
Alex Kavanagh 2023-11-08 16:25:06 +02:00
parent 4c0adf31a9
commit 5c69cfdd46
1 changed files with 16 additions and 0 deletions
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doc/source/release-notes/2023.2-bobcat.rst
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@ -209,6 +209,21 @@ This should not technically affect users as the new configuration should have
been automatically done. However, verification steps have been provided as an
:ref:`upgrade path note <az_option_removal>`.
Enforce MTU size between Octavia networks
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The behaviour of the Octavia loadbalancer charm has been changed to ensure that
the MTU size on the health manager port (typically called ``o-hm0``) matches
the MTU on the load balancer network (called ``lb-mgmt-net``). Prior to this
change, when the MTU sizes were not aligned and the ``o-hm0`` MTU is less than
the ``lb-mgmt-net`` MTU, then health check messages will be dropped causing the
load balancer to fail-over.
The new behaviour is to *always* align the MTU of the health manager port
(``o-hm0``) to that of the load balancer network (``lb-mgmt-net``).
For more details please see bug `LP #2018998`_.
Removed features
----------------
@ -265,3 +280,4 @@ For more details see `Upgrade issues`_.
.. _LP #1996237: https://launchpad.net/bugs/1996237
.. _LP #2030094: https://bugs.launchpad.net/charm-nova-cloud-controller/+bug/2030094
.. _LP #2036953: https://launchpad.net/bugs/2036953
.. _LP #2018998: https://bugs.launchpad.net/charm-octavia/+bug/2018998