Bug 2037841

Summary:	[RFE] use /dev/ptp_hyperv on Azure/AzureStack
Product:	OpenShift Container Platform	Reporter:	François Rigault <francois.rigault>
Component:	RHCOS	Assignee:	Aashish Radhakrishnan <aaradhak>
Status:	CLOSED ERRATA	QA Contact:	Michael Nguyen <mnguyen>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4.9	CC:	dornelas, jligon, miabbott, mrussell, nstielau
Target Milestone:	---
Target Release:	4.11.0
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:
Clones:	2060586 (view as bug list)		Environment:
Last Closed:	2022-08-10 10:41:42 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:
Bug Blocks:	2060586

Description François Rigault 2022-01-06 16:24:18 UTC

OCP Version at Install Time: 4.9
Platform: AzureStack, Azure
Architecture: x86_64


What are you trying to do? What is your use case?
configure Chrony as documented
https://docs.microsoft.com/en-us/azure/virtual-machines/linux/time-sync

What happened? What went wrong or what did you expect?
We need to define through butane machineconfig
- the udev rule to create /dev/ptp_hyperv (https://bugzilla.redhat.com/show_bug.cgi?id=1991834)
- the proper chrony configuration using /dev/ptp_hyperv and makestep
I expect it to work outside the box without any configuration needed.


What are the steps to reproduce your issue? Please try to reduce these steps to something that can be reproduced with a single RHCOS node.
- boot a rhcos VM on AzureStack
- chronyc tracking: shows NTP being used instead of the hardware clock.

(side note: there is no documentation on how to upgrade a "single RHCOS node")

Implemented on FCOS through
https://github.com/coreos/fedora-coreos-config/pull/1355
https://github.com/coreos/fedora-coreos-config/pull/1390

Comment 3 Micah Abbott 2022-03-03 19:29:23 UTC

The fix for this in RHCOS 4.11 landed as part of https://github.com/openshift/os/commit/f21cc4b8d4e61c9b92c8f77bf2e0284fb3991c4d

Moving to MODIFIED

Comment 6 errata-xmlrpc 2022-08-10 10:41:42 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 (Important: OpenShift Container Platform 4.11.0 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-2022:5069