Bug 1546170 – [3.7] missing node-to-node OVS flows

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Bug 1546170 - [3.7] missing node-to-node OVS flows

Summary:	[3.7] missing node-to-node OVS flows

Status:	CLOSED ERRATA

Aliases:	None

Product:	OpenShift Container Platform
Classification:	Red Hat
Component:	Networking (Show other bugs)
Sub Component:
Version:	3.7.1
Hardware:	Unspecified Unspecified

Priority	unspecified Severity unspecified
Target Milestone:	---
Target Release:	3.7.z
Assigned To:	Ben Bennett
QA Contact:	Meng Bo
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:	1546169 1544903 1547599
Blocks:
	Show dependency tree / graph

Reported:	2018-02-16 08:44 EST by Dan Winship
Modified:	2018-04-05 05:39 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	Cause: In some (as-yet-undetermined) circumstances, nodes were apparently receiving a duplicate out-of-order HostSubnet "deleted" event from the master. Consequence: When processing the duplicate event, the node could end up deleting OVS flows corresponding to an active node, causing pods on the two nodes to be unable to communicate with each other. (This was most noticeable when it happened to a node hosting the registry.) Fix: The HostSubnet event-processing code will now notice that the event is a duplicate and ignore it. Result: OVS flows are not deleted, and pods can communicate.
Story Points:	---
Clone Of:	1546169
Environment:
Last Closed:	2018-04-05 05:38:31 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Origin (Github)	18617	None	None	None	2018-02-16 08:44 EST
Red Hat Product Errata	RHBA-2018:0636	None	None	None	2018-04-05 05:39 EDT

Groups: None (edit)

Comment 1 Dan Winship 2018-02-16 08:46:15 EST

https://github.com/openshift/ose/pull/1073

Comment 3 Meng Bo 2018-03-12 06:34:08 EDT

Tested on 3.7.38, there is no replay of hostsubnet delete.

Comment 4 Dan Winship 2018-03-12 10:13:14 EDT

(In reply to Meng Bo from comment #3)
> Tested on 3.7.38, there is no replay of hostsubnet delete.

That's not what the patch fixes. The patch attempts to make it so that if a "replayed hostsubnet delete" occurs, that we do the right thing. But we don't know how to actually cause the "replayed hostsubnet delete" (or even if that really is the right description of what's occurring), so the fix can't really be QA'ed at this point (other than to make sure that it doesn't break anything else).

The real test will be when we get this fix deployed to Online, and we see if the node-to-node routing problem goes away.

Comment 8 errata-xmlrpc 2018-04-05 05:38:31 EDT

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-2018:0636

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