Bug 2177762

Summary: Global DNS configuration should not touch unmanaged gateway interface
Product: Red Hat Enterprise Linux 8 Reporter: Mat Kowalski <mko>
Component: nmstateAssignee: Gris Ge <fge>
Status: VERIFIED --- QA Contact: Mingyu Shi <mshi>
Severity: unspecified Docs Contact:
Priority: high    
Version: 8.4CC: ferferna, jiji, jishi, network-qe, sfaye, sgurnale, till
Target Milestone: rcKeywords: Triaged
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: nmstate-1.4.3-1.el8 Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2174710, 2183216    
Attachments:
Description Flags
verified.log none

Description Mat Kowalski 2023-03-13 15:10:13 UTC 
Description of problem:

It has been observed that when applying NNCP that defines only global DNS config and does not configure any interface specifically, the gateway interface is converted from unmanaged to managed.

This is not desired for various reasons, but to simplify it can be said that global DNS config should not be creating any specific per-interface configuration.


Version-Release number of selected component (if applicable):

nmstate-1.0.2-21.el8_4


How reproducible:

Always


Steps to Reproduce:
1. Create NNCP with `.spec.desiredState.dns-resolver.config.search` and `.spec.desiredState.dns-resolver.config.server`
2. Make sure NNCP doesn't define any per-interface config

Actual results:

Gateway interface gets converted from unmanaged to managed with DNS configuration from NNCP applied to it

Expected results:

Configuration of gateway interface is not changed. DNS is applied globally
Comment 2 Mat Kowalski 2023-03-13 15:12:49 UTC 
Please note this affects a customer with OCP 4.10, thus it needs a backport back to 8.4
Comment 11 Gris Ge 2023-04-04 03:50:15 UTC 
Summery on the fix.

With nmstate-1.4.3-1.el8, nmstate will not store DNS configurations to interface which is unmanaged or external managed in NetworkManager, but using global DNS directly.
Comment 15 Mingyu Shi 2023-05-08 10:14:58 UTC 
Created attachment 1963166 [details]
verified.log

Verified with:
nmstate-1.4.4-2.el8.x86_64
nispor-1.2.10-1.el8.x86_64
NetworkManager-1.40.16-4.el8.x86_64
DISTRO=RHEL-8.9.0-20230503.20