Release notes for dns_domain behavioural changes

As part of the fix for bug 1826419, a prior release note was
deleted and no new release note was added to document the
change in behaviour as a result of upgrading.

Add new release note to detail the behaviour of
{network,conf}.dns_domain with respect to the DHCP agent
post upgrade.

The deleted release note will be restored in the stable
branches where it was removed.

Change-Id: Ic668d64c28cdc1068cb2413b09839a127bad46d3
Related-Bug: 1826419
This commit is contained in:
James Page 2019-06-11 14:02:44 +01:00 committed by Brian Haley
parent 17caf723fa
commit 8b1442c708
1 changed files with 12 additions and 0 deletions

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fixes:
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A previous bug fix changed the behaviour of the DHCP agent to use a
network's ``dns_domain`` as the search path provided to instances
overriding the ``dns_domain`` configuration option used by both the DHCP
agent and the main server process when generate port DNS assignments.
This broke the original design intent of the ``dns_domain`` attribute of
a network which was for integration with external DNS systems such as
Designate rather than for use in Neutron's internal DNS support.
This incorrect change in behaviour has now been reverted - the DHCP
agent will only ever use the ``dns_domain`` configuration option.