Bug 2117569

Summary:	kube-controller-manager needs to stop watching all events
Product:	OpenShift Container Platform	Reporter:	Michal Fojtik <mfojtik>
Component:	kube-controller-manager	Assignee:	Ben Luddy <bluddy>
Status:	CLOSED ERRATA	QA Contact:	zhou ying <yinzhou>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	4.12	CC:	mfojtik
Target Milestone:	---	Keywords:	FastFix
Target Release:	4.12.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	Event objects in the events.k8s.io/v1 group were unnecessarily being watched by the garbage collection controller. In a case of unbound Event creation (e.g. due to a runaway controller), this could result in degraded performance. The garbage collection controller now ignores Events.	Story Points:	---
Clone Of:
Clones:	2118318 (view as bug list)		Environment:
Last Closed:	2023-01-17 19:54:46 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:
Bug Depends On:
Bug Blocks:	2117679, 2118318

Description Michal Fojtik 2022-08-11 10:42:49 UTC

Description of problem:

The garbage collector must ignore ALL events; otherwise, if a rouge controller or a workload causes unbound event creation, GC performance will degrade as it has to process the events.

Fix: https://github.com/openshift/kubernetes/pull/1338

This bug is to track fix in master (4.12) and also allow to backport to 4.11.1

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


How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

Comment 6 errata-xmlrpc 2023-01-17 19:54:46 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 (Moderate: OpenShift Container Platform 4.12.0 bug fix and security 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/RHSA-2022:7399