Bug 1506697 – Don't freeze the VM when taking a live snapshot in LSM

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 1506697 - Don't freeze the VM when taking a live snapshot in LSM

Summary:	Don't freeze the VM when taking a live snapshot in LSM

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	ovirt-engine
Classification:	oVirt
Component:	BLL.Storage (Show other bugs)
Sub Component:
Version:	4.2.0
Hardware:	Unspecified Unspecified

Priority	high Severity high (vote)
Target Milestone:	ovirt-4.2.0
Target Release:	---
Assigned To:	Benny Zlotnik
QA Contact:	Lilach Zitnitski
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:	1557448
	Show dependency tree / graph

Reported:	2017-10-26 11:10 EDT by Allon Mureinik
Modified:	2018-03-19 08:54 EDT (History)
CC List:	2 users (show)

See Also:
Fixed In Version:
Doc Type:	Enhancement
Doc Text:	Virtual machine file systems are no longer frozen while taking the temporary snapshots created during live storage migration. This improves the speed of the migration.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2017-12-20 06:32:36 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	Storage
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Flags:	rule-engine: ovirt‑4.2+

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
oVirt gerrit	84016	master	MERGED	core: do not freeze FS when creating the LSM snapshot	2017-11-26 12:47 EST

Groups: None (edit)

Description Allon Mureinik 2017-10-26 11:10:11 EDT

Description of problem:
The live snapshot taken in LSM is temporary, and is merged into once LSM is done. There's no point in freezing the VM when taking it.

This is currently controlled in org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand#shouldFreezeOrThawVm

Comment 1 Lilach Zitnitski 2017-12-12 07:56:38 EST

--------------------------------------
Tested with the following code:
----------------------------------------
rhvm-4.2.0-0.6.el7.noarch
vdsm-4.20.9-1.el7ev.x86_64

Tested with the following scenario:

Steps to Reproduce:
1. start LSM 


Actual results:
Guest's file system did not freeze during the LSM 

Expected results:

Moving to VERIFIED!

Comment 2 Sandro Bonazzola 2017-12-20 06:32:36 EST

This bugzilla is included in oVirt 4.2.0 release, published on Dec 20th 2017.

Since the problem described in this bug report should be
resolved in oVirt 4.2.0 release, published on Dec 20th 2017, it has been closed with a resolution of CURRENT RELEASE.

If the solution does not work for you, please open a new bug report.

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