Bug 1497768 – [3.5] Conntrack table entry is not removed when UDP service is added after single pod was removed and added back

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Bug 1497768 - [3.5] Conntrack table entry is not removed when UDP service is added after single pod was removed and added back

Summary:	[3.5] Conntrack table entry is not removed when UDP service is added after si...

Status:	CLOSED ERRATA

Aliases:	None

Product:	OpenShift Container Platform
Classification:	Red Hat
Component:	Networking (Show other bugs)
Sub Component:
Version:	3.5.1
Hardware:	Unspecified Unspecified

Priority	unspecified Severity urgent
Target Milestone:	---
Target Release:	3.5.z
Assigned To:	Dan Winship
QA Contact:	Meng Bo
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:	1487438
Blocks:
	Show dependency tree / graph

Reported:	2017-10-02 11:43 EDT by Dan Winship
Modified:	2017-11-24 00:43 EST (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	Cause: Conntrack entries for UDP traffic were not cleared when an endpoint was added for a service that previously had no endpoints. Consequence: The system could end up incorrectly caching a rule that would cause traffic to that service to be dropped rather than being sent to the new endpoint. Fix: The relevant conntrack entries are now deleted at the right time. Result: UDP services work correctly when endpoints are added and removed.
Story Points:	---
Clone Of:	1487438
Environment:
Last Closed:	2017-10-25 09:08:02 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
Red Hat Knowledge Base (Solution)	3153091	None	None	None	2017-10-02 11:43 EDT
Red Hat Product Errata	RHBA-2017:3049	normal	SHIPPED_LIVE	OpenShift Container Platform 3.6, 3.5, and 3.4 bug fix and enhancement update	2017-10-25 11:57:15 EDT

Groups: None (edit)

Comment 1 Dan Winship 2017-10-02 13:05:01 EDT

https://github.com/openshift/ose/pull/881

Comment 3 Meng Bo 2017-10-12 03:56:28 EDT

Tested on ocp build v3.5.5.31.34 with steps:

1. Create pod
2. Expose the pod with udp port
$ oc expose pod udp-pod --protocol="UDP"
3. Acess the service via udp port
4. Check the conntrack table on the node
# conntrack -L -D $svc_IP
5. Delete the pod created in step 1
6. Check the conntrack table on node again

The conntrack entry about the udp connection will be deleted immediately once the pod deleted.

Comment 5 errata-xmlrpc 2017-10-25 09:08:02 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-2017:3049

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