Bug 1778314

Summary:	False Alarm - SDN pod has gone too long without syncing iptables rules
Product:	OpenShift Container Platform	Reporter:	Hugo Cisneiros (Eitch) <hcisneir>
Component:	Networking	Assignee:	Jacob Tanenbaum <jtanenba>
Networking sub component:	openshift-sdn	QA Contact:	zhaozhanqi <zzhao>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	high
Priority:	high	CC:	cdc, ddelcian, jtanenba
Version:	4.2.z
Target Milestone:	---
Target Release:	4.2.z
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1797033 (view as bug list)		Environment:
Last Closed:	2020-02-24 16:52:45 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:	1797033, 1797041
Bug Blocks:

Description Hugo Cisneiros (Eitch) 2019-11-29 21:15:13 UTC

Description of problem:

Cluster dashboard has these alarms:

* SDN pod sdn-9d4hc on node etcd-2.example.com has gone too long without syncing iptables rules. NOTE - There is some scrape delay and other offsets, 120s isn't exact but it is still too high.
* SDN pod sdn-sgrgk on node etcd-0.example.com has gone too long without syncing iptables rules. NOTE - There is some scrape delay and other offsets, 120s isn't exact but it is still too high.

While looking at the must-gather logs, I didn't see any problems on these pods sync processes:

2019-11-28T18:47:27.446545877Z I1128 18:47:27.446460 59750 proxy.go:331] hybrid proxy: syncProxyRules start
2019-11-28T18:47:27.597400981Z I1128 18:47:27.597347 59750 proxy.go:334] hybrid proxy: mainProxy.syncProxyRules complete
2019-11-28T18:47:27.653302796Z I1128 18:47:27.653260 59750 proxier.go:367] userspace proxy: processing 0 service events
2019-11-28T18:47:27.653409624Z I1128 18:47:27.653389 59750 proxier.go:346] userspace syncProxyRules took 55.912068ms
2019-11-28T18:47:27.653445515Z I1128 18:47:27.653436 59750 proxy.go:337] hybrid proxy: unidlingProxy.syncProxyRules complete

These are happening every 30 seconds, and the most time it took to complete was ~240ms. Very far from 120s.

Not sure why these are alarming.

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

4.2.0

How reproducible:

* The alarms are on the web console dashboard;
* Log files at namespaces/openshift-sdn/sdn*/sdn/sdn/logs/current.log

Actual results:

Alarming in the dashboard.

Expected results:

No alarms.

Additional info:

Comment 4 Daniel Del Ciancio 2020-01-31 17:12:24 UTC

Need a status update - Is this targeted for 4.2.z or 4.3?  Or is a fix available?

Comment 10 errata-xmlrpc 2020-02-24 16:52:45 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-2020:0460