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Created attachment 1663737 [details]
Reproduce script

Description of problem:

Try to detach 'eth1' from a OVS bridge. but `nmcli edit` silently ignored
all changes made to `connection.master`, `connection.slave-type` and `ovs-interface.type`.

Version-Release number of selected component (if applicable):
NetworkManager-1.22.7-24704.53b878818c.el8.x86_64

How reproducible:
100%

Steps to Reproduce:
1. ./nm_bug.sh
2.
3.

Actual results:


Expected results:


Additional info:

Created attachment 1663738 [details]
System logs with NM trace enabled

The issue here is that the ifcfg-rh backend doesn't remove the OVS_PORT=port0 variable from the connection during the update.

This is fixed on master by commit "ifcfg-rh: clear all untouched, known keys before writing ifcfg-rh file":

 https://gitlab.freedesktop.org/NetworkManager/NetworkManager/commit/07262b165d411456680be062df5f74b43d921dca

fixed on nm-1-22 branch:

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/commit/0c8046574e782ca926d265348d10866f1653aef1


(also, a simpler reproducer in the commit message).


@QA: I think this is a very trivial fix. I don't think it's worth writing a CI test. Manual testing should suffice.

Thanks for the quick fix. It works well.

*** Bug 1804561 has been marked as a duplicate of this bug. ***

test clear_ovs_settings added

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:1847