Bug 2155745

Summary:	A DNS server is added to an instance even though the subnet's dns servers field is empty
Product:	Red Hat OpenStack	Reporter:	Itzik Brown <itbrown>
Component:	python-networking-ovn	Assignee:	OSP Team <rhos-maint>
Status:	NEW ---	QA Contact:	Eran Kuris <ekuris>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	16.1 (Train)	CC:	apevec, lhh, majopela, scohen
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Description Itzik Brown 2022-12-22 08:02:22 UTC

Description of problem:
A server has two networks.
One of the networks has a subnet with empty dns_nameservers field.

When looking into the instance's /etc/resolv.conf a nameserver from the Controller's /etc/resolv.conf is added

Version-Release number of selected component (if applicable):
RHOS-16.1-RHEL-8-20221206.n.1

How reproducible:
100%

Steps to Reproduce:
As mentioned in the description

Actual results:
A DNS server is added even when the subnet has empty dns_nameservers field.

Expected results:
No DNS server will be added when a subnet has empty dns_nameservers field.


Additional info: