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Bug 1593210

Summary: [NMCI] ipv6_keep_external_routes test failed
Product: Red Hat Enterprise Linux 7 Reporter: Vladimir Benes <vbenes>
Component: NetworkManagerAssignee: Thomas Haller <thaller>
Status: CLOSED ERRATA QA Contact: Desktop QE <desktop-qa-list>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.6CC: atragler, bgalvani, fgiudici, lrintel, rkhan, sukulkar, thaller
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: NetworkManager-1.12.0-1.el7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-10-30 11:14:18 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:
Attachments:
Description Flags
[logfile] show issue none

Description Vladimir Benes 2018-06-20 09:46:09 UTC 
Description of problem:
it looks like there is a difference between

ip addr add fc00:a::10/64 dev eth3; sleep 1; ip -6 route add fc00:b::10/128 via fc00:a::1
and 
ip addr add fc00:a::10/64 dev eth3; ip -6 route add fc00:b::10/128 via fc00:a::1

This shouldn't happen, that sleep should make no difference

Version-Release number of selected component (if applicable):
NM-1.12


https://beaker.engineering.redhat.com/recipes/5286007/tasks/73960856/results/358532820/logs/report_NetworkManager-ci_Test237_ipv6_keep_external_routes.html
Comment 2 Thomas Haller 2018-06-20 13:05:12 UTC 
https://github.com/NetworkManager/NetworkManager/pull/144
Comment 3 Thomas Haller 2018-06-29 11:03:43 UTC 
Created attachment 1455495 [details]
[logfile] show issue

This used NM from master (commit bf7b941502), with running

  ./nmcli/runtest.sh ipv6_keep_external_routes

from NM-ci (commit 83bc1631496ef4beee687cf911e7b0d427824798)
Comment 4 Thomas Haller 2018-06-29 11:11:08 UTC 
(In reply to Thomas Haller from comment #3)
> Created attachment 1455495 [details]
> [logfile] show issue

at [1530268706.4408] we see the address fc00:a::10/64 externally added... then:

  device[0x55a7a8f19b60] (eth3): linklocal6: generated EUI-64 IPv6LL address fe80::5054:ff:feba:f4fc
  device[0x55a7a8f19b60] (eth3): ip6-config: update (commit=1, new-config=0x55a7a8f88220)
  platform: address: deleting IPv6 address fc00:a::10/64, ifindex 5 dev eth3


(note, that at that point, eth3's NMDevice state was:

  [1530268604.8760] device (eth3): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')


Oddly, when I try this manually, I can reproduce it easily. But the CI tests in jenkins often pass this test. The reason is unknown. This is essentially a race, but odd that it happens commonly in the manual case and commonly not in the automated case.


With https://github.com/NetworkManager/NetworkManager/pull/144, in particular commit "device: only check for IPv6 DAD and link-local address on actively..." I didn't not reproduce the issue anymore.
Comment 5 Thomas Haller 2018-07-01 08:51:16 UTC 
merged to

master: https://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=8076a6f00355710f3d0706a981aefdbb25b33e3b
nm-1-12: https://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=f3d1cf8100dbe75f04cac3787b2c1a593190cdcb
Comment 7 Vladimir Benes 2018-08-17 13:23:10 UTC 
Haven't seen this issue for a while, I consider this fixed.
Comment 9 errata-xmlrpc 2018-10-30 11:14:18 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, 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-2018:3207