Bug 1251958

Summary:	VDSM: Live merge fails after a disk containing a snapshot has been extended
Product:	Red Hat Enterprise Virtualization Manager	Reporter:	rhev-integ
Component:	vdsm	Assignee:	Adam Litke <alitke>
Status:	CLOSED ERRATA	QA Contact:	Aharon Canan <acanan>
Severity:	high	Docs Contact:
Priority:	high
Version:	3.5.1	CC:	acanan, alitke, amureini, bazulay, ecohen, gwatson, lpeer, lsurette, mkalinin, ratamir, tnisan, ycui, yeylon, ylavi
Target Milestone:	ovirt-3.5.7	Keywords:	ZStream
Target Release:	3.5.7
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	storage
Fixed In Version:	vdsm-4.16.27-1	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	1232481	Environment:
Last Closed:	2016-01-12 20:34:31 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Storage	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1232481
Bug Blocks:

Comment 1 Aharon Canan 2015-10-06 12:27:00 UTC

Verified using the following versions:
---------------------------------------
rhevm-3.5.5-0.1.el6ev.noarch - running on Rhel6.7
vdsm-4.16.27-1.el7ev.x86_64 - running on Rhel7.1

Scenario 1:
----------------
1. Create a VM with 1gb preallocated disk (probably thin as well, didn't test that) in a block-based domain.
2. Create a snapshot.
3. Extend the disk to 2gb.
4. Start the VM.
5. Delete the snapshot - Live merge works well!


same verification like in https://bugzilla.redhat.com/show_bug.cgi?id=1241433 - same issue and 2 bugs - engine and vdsm

Comment 2 Adam Litke 2015-10-22 13:50:18 UTC

This will fail when the VM is not running on an SPM host as described in bug 1274323

Comment 3 Adam Litke 2015-10-22 13:51:40 UTC

Moving back to ASSIGNED per previous comment.

Comment 5 Yaniv Lavi 2015-10-28 14:07:57 UTC

Why did you move this to 3.5.7?

Comment 6 Tal Nisan 2015-11-01 11:20:06 UTC

See comment #2, the bug is not completely fixed

Comment 7 Adam Litke 2015-11-03 14:20:16 UTC

Talked with Tal and we decided to move this back to MODIFIED and track the backport of bug 1274323 in a new clone.  It will just keep things simpler.

To re-verify, you can rerun the scenario in comment one ensuring that the VM runs on the SPM host.

Comment 8 Aharon Canan 2015-12-24 10:18:20 UTC

Verified using the following versions:
---------------------------------------
rhevm-3.5.7-0.1.el6ev.noarch - running on Rhel6.7
vdsm-4.16.31-1.el7ev.x86_64 - running on Rhel7.2

Scenario 1:
----------------
1. Create a VM with 1gb preallocated disk (probably thin as well, didn't test that) in a block-based domain.
2. Create a snapshot.
3. Extend the disk to 2gb.
4. Start the VM on SPM.
5. Delete the snapshot

Scenario 2:
--------------------
1) Create a VM with 1gb preallocated disk in a block-based domain.
2) Create a snapshot.
3) Create a second snapshot.
4) Extend the disk to 2gb.
5) Start the VM on SPM.
6) Delete the second snapshot


Same flows on HSM will be verified on https://bugzilla.redhat.com/show_bug.cgi?id=1292129

Also, didn't face any errors like in https://bugzilla.redhat.com/show_bug.cgi?id=1232481#c28

Comment 11 errata-xmlrpc 2016-01-12 20:34:31 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, 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://rhn.redhat.com/errata/RHBA-2016-0034.html