openstack/tripleo-heat-templates
Code Issues Proposed changes

Deprecate DnsServers THT parameter

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We have used the dns_nameservers from the subnets for
a long time by default: https://review.opendev.org/579582

With network config being applied prior to creating the heat
stack we cannot use a THT parameter to feed the input for
node network configuration. In Wallaby and later the nameservers
must be defined in undercloud.conf using:
  'DEFAULT/undercloud_nameservers'

or

  '%SUBNET_SECTION%/dns_nameservers'

The latter allow defining nameservers per-ctlplane subnet.

Related: RHBZ#2068489
Change-Id: I436fa7f1e87a8e6924c9d93105b06f9ab39eeb8f
This commit is contained in:
Harald Jensås 2022-03-25 16:11:29 +01:00
parent c4205b9641
commit 42506f635d
2 changed files with 16 additions and 0 deletions
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1
overcloud.j2.yaml
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@ -419,6 +419,7 @@ parameter_groups:
- label: deprecated
description: Do not use deprecated params, they will be removed.
parameters:
- DnsServers
{%- set parameter_groups_defined = true %}
{%- endif %}
{%- endif %}

15
releasenotes/notes/deprecate-DnsServers-a65541c2dceced08.yaml Normal file
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@ -0,0 +1,15 @@
---
deprecations:
- |
The tripleo-heat-templates parameter DnsServers has been deprecated.
The dns_nameservers from the ctlplane subnets has been used by default for
overcloud node nameservers for a long time, see:
https://review.opendev.org/579582.
Since Wallaby network configuration is applied prior to the Heat stack
create, during overcloud node provisioning. In this case the THT parameter
DnsServers is not available when network configuration is applied.
Effectively the DnsServers parameter cannot be used in Wallaby and later
releases.