Bug 1871769

Summary:	[IPI baremetal] Keepalived.conf remember old ip's which are not available anymore
Product:	OpenShift Container Platform	Reporter:	Nataf Sharabi <nsharabi>
Component:	Machine Config Operator	Assignee:	Yossi Boaron <yboaron>
Status:	CLOSED ERRATA	QA Contact:	Nataf Sharabi <nsharabi>
Severity:	low	Docs Contact:
Priority:	low
Version:	4.6	CC:	asegurap, bperkins
Target Milestone:	---	Keywords:	Triaged
Target Release:	4.6.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	Cause: Starting from OCP 4.6 Keepalived runs in unicast mode, which means the bootstrap IP address should be included in the Keepalived configuration of master nodes. After bootstrap VM removed the bootstrap IP address still included in masters Keepalived configuration. Consequence: In case the bootstrap IP address will be allocated by the DHCP server to some other machine, master nodes will spam this machine with unicast VRRP announcement packets. Fix: Change the Keepalived flow during bootstrap, so the bootstrap will own the VIP till bootstrap complete phase and then the Keepalived on the bootstrap node will be shut down by the keepalived-monitor container on bootstrap. With this approach, master nodes don't need to include the bootstrap IP address in their Keepalived configuration. Result: No unused IP addresses included in Keepalived configuration file on master nodes.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-10-27 16:30:45 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:

Description Nataf Sharabi 2020-08-24 08:52:59 UTC

Description of problem:

Due to unicast changes in configuration,
After installation we can the keepalived.conf holds the bootstrap ip,
Even though it is no longer available.



Version-Release number of selected component (if applicable):
4.6.0-0.nightly-2020-08-18-165040

How reproducible:


Steps to Reproduce:
1.Deploy ocp 4.6.
2.On master node:
  cat /etc/keepalived/keepalived.conf

Actual results:


Expected results:
We should clean this old ip's that are no longer available.

Additional info:

Comment 1 Antoni Segura Puimedon 2020-08-25 14:57:51 UTC

Moving severity to low, since it does not affect the cluster.

Comment 2 Ben Nemec 2020-08-25 15:00:53 UTC

Targeting to 4.7 since this doesn't need to block 4.6. If we fix it before release we can always pull this back in.

Comment 3 Nataf Sharabi 2020-09-30 19:55:32 UTC

Verified on 
[kni@provisionhost-0-0 ~]$ oc version
Client Version: 4.6.0-fc.8
Server Version: 4.6.0-fc.8
Kubernetes Version: v1.19.0+359dd79

Comment 6 errata-xmlrpc 2020-10-27 16:30:45 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 (OpenShift Container Platform 4.6 GA Images), 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-2020:4196