Bug 2081559

Summary:	[RFE] discrepancy tool should detect preallocated cow images that were reduced
Product:	Red Hat Enterprise Virtualization Manager	Reporter:	Germano Veit Michel <gveitmic>
Component:	rhv-log-collector-analyzer	Assignee:	Germano Veit Michel <gveitmic>
Status:	CLOSED ERRATA	QA Contact:	Barbora Dolezalova <bdolezal>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	4.4.10	CC:	aperotti, apinnick, gdeolive
Target Milestone:	ovirt-4.5.1	Keywords:	FieldEngineering, FutureFeature, ZStream
Target Release:	4.5.1
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	rhv-log-collector-analyzer-1.0.14-1.el8ev	Doc Type:	Enhancement
Doc Text:	The rhv-log-collector-analyzer discrepancy tool now detects preallocated QCOW2 images that have been reduced.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-07-14 12:54:34 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Integration	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Germano Veit Michel 2022-05-04 00:51:37 UTC

This is to track an improvement to be able to detect BZ2081493.

We want to highlight this case:
* the volume size in the storage is lower than the capacity
* the volume is QCOW2 (optional?)
* the volume is preallocated

So that the tool will complain on disks that are supposed to be preallocated but are not.

Comment 3 Germano Veit Michel 2022-05-13 00:41:03 UTC

For QE:

1. Create a VM, with no disks
2. Virtual Machines -> VM -> Disks -> New
   Set the disk to preallocated and enable incremental:
     Allocation Policy: PREALLOCATED
     [x] Enable Incremental Backup
     Size: 100G
3. Click OK
5. Create a snapshot of the VM
6. Delete that snapshot.

While using an engine/vdsm without fix for BZ 2081493, the tool should print this message for the disk created in step 2.

$ rhv-image-discrepancies 
~~~
Image image_guid size on the storage(1073741824) is smaller than capacity(107374182400), but type is preallocated
~~~

Comment 7 Barbora Dolezalova 2022-06-13 12:14:58 UTC

I followed the steps and the tool printed the message:
Image image_guid size on the storage(200704) is smaller than capacity(107374182400), but type is preallocated.

Verified in rhv-log-collector-analyzer-1.0.14-1.el8ev.noarch, ovirt-engine-4.5.1-0.62.el8ev.noarch

Comment 12 errata-xmlrpc 2022-07-14 12:54:34 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 (Moderate: RHV Manager (ovirt-engine) [ovirt-4.5.1] security, bug fix and 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-2022:5555