Bug 1806891

Summary:	Switching from dynamic to static IPv6 only, sometimes causes the verification failure
Product:	Red Hat Enterprise Linux 8	Reporter:	Michael Burman <mburman>
Component:	nmstate	Assignee:	Gris Ge <fge>
Status:	CLOSED ERRATA	QA Contact:	Mingyu Shi <mshi>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	8.2	CC:	amusil, ferferna, jiji, jishi, jwboyer, kanderso, mshi, network-qe, reliezer, till
Target Milestone:	rc	Keywords:	ZStream
Target Release:	8.0
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	nmstate-0.3.2-1.el8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1817477 1817613 1817614 (view as bug list)		Environment:
Last Closed:	2020-11-04 03:08:25 UTC	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:	1817477, 1817613, 1817614

Description Michael Burman 2020-02-25 09:45:28 UTC

Description of problem:
Switching from static to dynamic IPv6 only, sometimes causes the verification failure

Seen in RHV QE network automation tests from time to time

Version-Release number of selected component (if applicable):
nmstate-0.2.6-1.el8.noarch

How reproducible:
Sometimes, it's a race.

Steps to Reproduce:
1. Switch from dynamic IPV6 to static IPv6

Actual results:
Verification fail on nmstate side

Expected results:
Should work

Comment 2 Gris Ge 2020-02-26 05:50:23 UTC

Reproduced this problem by switching from DHCP without DHCP server to static IPv4(IPv6 disabled).

This chance is 1/15.

Cannot reproduce this issue using `nmstatectl`, these steps should be done in single python file:

 * Create dummy0 with DHCP enabled but no DHCP server.
 * Change from DHCP to static IPv4 with IPv6 disabled.
 * Delete dummy0

The possible change to fix this problem require 100+ line changes to the code base. Hence move to 8.2.1.

Comment 3 Gris Ge 2020-02-26 06:09:54 UTC

Correction:

Reproduced this problem by switching from DHCP without DHCP server to static IPv6(IPv4 disabled).

This chance is 1/15.

Cannot reproduce this issue using `nmstatectl`, these steps should be done in single python file:

 * Create dummy0 with DHCP enabled but no DHCP server.
 * Change from DHCP to static IPv6 with IPv4 disabled.
 * Delete dummy0

The possible change to fix this problem require 100+ line changes to the code base. Hence move to 8.2.1.

Comment 4 Gris Ge 2020-02-27 08:31:08 UTC

Upstream tracker is https://github.com/nmstate/nmstate/issues/736

Comment 6 Gris Ge 2020-03-13 12:30:44 UTC

The problem has been fixed in nmstate-0.2.6-4.8.el8

The decent fix will be targeting RHEL 8.3.

Comment 8 Gris Ge 2020-03-25 15:56:09 UTC

Confirmed not fixed in RHEL 8.2.0 with nmstate-0.2.6-4.8.el8

Move to RHEL 8.3 and also requesting z-stream for 8.2.0

Comment 12 Gris Ge 2020-03-27 09:03:01 UTC

*** Bug 1807034 has been marked as a duplicate of this bug. ***

Comment 16 Mingyu Shi 2020-06-28 07:53:56 UTC

verified with versions:
nmstate-0.3.2-1.el8.noarch
NetworkManager-1.26.0-0.1.el8.x86_64
DISTRO=RHEL-8.3.0-20200627.n.0
Linux hp-dl388g8-08.rhts.eng.pek2.redhat.com 4.18.0-221.el8.x86_64 #1 SMP Thu Jun 25 20:58:19 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

run the case: kernel/networking/nmstate/sanity/switching-from-dynamic-to-static-IPv6-only-sometimes-causes-the-verification-failure_bz1817477

Comment 19 errata-xmlrpc 2020-11-04 03:08:25 UTC

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 (nmstate bug fix and enhancement update), 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-2020:4696