Bug 1328920 - [RFE] apply RTC parameter automatically on Windows 2008+
Summary: [RFE] apply RTC parameter automatically on Windows 2008+
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: ovirt-guest-agent
Classification: oVirt
Component: Core
Version: 1.0.13
Hardware: Unspecified
OS: Unspecified
high
high vote
Target Milestone: ovirt-4.0.0-rc3
: 1.0.12-2
Assignee: Vinzenz Feenstra [evilissimo]
QA Contact: Jiri Belka
URL:
Whiteboard:
Depends On: 1347276
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-04-20 15:00 UTC by Michal Skrivanek
Modified: 2019-12-16 05:43 UTC (History)
15 users (show)

Fixed In Version: oVirt-toolsSetup_4.0-1.fc23.iso
Doc Type: Enhancement
Doc Text:
With this release, the USEPLATFORMCLOCK option is enabled automatically when the guest agent is started on virtual machines running Windows 2008 and later.
Clone Of: 1328309
Environment:
Last Closed: 2016-07-05 07:58:42 UTC
oVirt Team: Virt
vfeenstr: ovirt-4.0.0?
michal.skrivanek: planning_ack?
rule-engine: devel_ack+
pstehlik: testing_ack+

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Knowledge Base (Solution) 2407681 0 None None None 2016-06-27 12:19:18 UTC
oVirt gerrit 58732 0 master MERGED Win: Apply USEPLATFORMCLOCK on Windows 6.x+ on startup 2016-06-07 13:33:17 UTC
oVirt gerrit 59206 0 ovirt-4.0 MERGED Win: Apply USEPLATFORMCLOCK on Windows 6.x+ on startup 2016-06-15 07:05:06 UTC

Description Michal Skrivanek 2016-04-20 15:00:29 UTC 
+++ This bug was initially created as a clone of Bug #1328309 +++

Description of problem:

Old versions of the RHEV Admin guide (https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.0/html/Administration_Guide/KVM_Clock_Appendix.html) make references to "USEPLATFORMCLOCK" however, this is not mentioned in newer versions of the admin guide.

When Windows VMs have snapshots taken, they are paused for a short amount of time.  When the VM comes back, the time is out somewhat.

How do we tell Windows VMs to use the hypervisors clock?

The versions of Windows affected are Windows 2008R2 and above.

--- Additional comment from Sarvesh Pandit on 2016-04-19 05:09:24 CEST ---

I have found following documentation link for KVM :


14.3. Using the Real-Time Clock with Windows Server 2008, Windows Server 2008 R2, and Windows 7 guests

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Host_Configuration_and_Guest_Installation_Guide/KVM_guest_timing_management-Using_the_Real_Time_Clock_with_Windows_2008_and_later_guests.html


--- Additional comment from Michal Skrivanek on 2016-04-20 16:57:30 CEST ---

hm, regardless doc updates this is something we can try to help with automatically as well. We have a guest agent and that one can try to do that for you. Let me clone this to a guest agent RFE
Comment 1 Sandro Bonazzola 2016-06-20 08:37:15 UTC 
Not marked as blocker, I suggest to postpone to 4.0.1
Comment 2 Michal Skrivanek 2016-06-20 08:41:09 UTC 
would it not be included in nightly guest-tools-iso build? Which one do we deliver?
Comment 3 Sandro Bonazzola 2016-06-20 08:55:16 UTC 
Unless something changes, http://resources.ovirt.org/pub/ovirt-4.0-pre/iso/oVirt-toolsSetup/

But moving the needinfo on didi who is maintaining it.
Comment 6 Jiri Belka 2016-06-24 13:34:50 UTC 
ok, tested with agent64 4.40-3 on w2k12r2.
Comment 9 Sandro Bonazzola 2016-07-05 07:58:42 UTC 
oVirt 4.0.0 has been released, closing current release.
Comment 10 Michal Skrivanek 2016-07-11 13:53:54 UTC 
note we want to change the behavior (almost) the other way around in bug 1354532
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