Bug 1891470 - [CBT][RFE] Support cold VM incremental backup
Summary: [CBT][RFE] Support cold VM incremental backup
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: ovirt-engine
Classification: oVirt
Component: BLL.Storage
Version: future
Hardware: Unspecified
OS: Unspecified
unspecified
high
Target Milestone: ovirt-4.4.5
: ---
Assignee: Eyal Shenitzky
QA Contact: Ilan Zuckerman
URL:
Whiteboard:
: 1892670 (view as bug list)
Depends On: 1901830 1901835 1904486
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-10-26 11:40 UTC by Eyal Shenitzky
Modified: 2022-02-01 08:48 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Feature: Support VM backup when the VM is not running Reason: Backup vendors and users should have the option to backup their VMs even when they are not running. Result: Backup of VMs that are not running is now supported, the same API that used for backup running VMs is used so it is transparent for the backup vendor or the user what is the status of the VM. The process of 'cold' backup is different, when a cold backup is taken there is no need to redefine the previous checkpoints and to create scratch disks for each disk that participate in the backup because the VM is down and there will be no writing to the disks during the backup. The backup operation is done without Libvirt. A checkpoint created in the Engine DB in the same way as for 'live' backup but in the host, there is no checkpoint creation. Instead, a new bitmap is added for each disk. The created bitmap will be exposed using the NBD server when the image will be downloaded using imageio. When the VM is started with "cold" backup checkpoints, the system will redefine the checkpoints in Libvirt. Once a 'cold' checkpoint is redefined, there is no difference between the 'cold' checkpoint and checkpoint created during live backup.
Clone Of:
Environment:
Last Closed: 2021-03-18 15:14:38 UTC
oVirt Team: Storage
Embargoed:
pm-rhel: ovirt-4.4?
izuckerm: testing_plan_complete+
pm-rhel: planning_ack?
tnisan: devel_ack+
pm-rhel: testing_ack+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
oVirt gerrit 111874 0 master MERGED core: add cold_backup_enabled field to VDS 2021-02-14 06:59:00 UTC
oVirt gerrit 111875 0 master MERGED core: introduce AddVolumeBitmapVDSCommand 2021-02-14 06:59:00 UTC
oVirt gerrit 111876 0 master MERGED core: allow cold VM incremental backup 2021-02-14 06:58:59 UTC
oVirt gerrit 111877 0 master MERGED volume.py: introduce add/remove bitmap for a volume 2021-02-14 06:58:59 UTC
oVirt gerrit 111878 0 master MERGED caps.py: support offline VM backup 2021-02-14 06:59:00 UTC
oVirt gerrit 111890 0 master ABANDONED API: add new generate_checkpoint() API call 2021-02-14 06:59:00 UTC
oVirt gerrit 111891 0 master ABANDONED backup.py: implement generate_checkpoint 2021-02-14 06:59:00 UTC
oVirt gerrit 111931 0 master ABANDONED core: introduce GenerateVmCheckpointVDSCommand 2021-02-14 06:59:00 UTC
oVirt gerrit 111932 0 master ABANDONED core: generate VM checkpoint XML if checkpoint XML is missing 2021-02-14 06:59:01 UTC
oVirt gerrit 112025 0 master MERGED core: expose bitmap in NBD server for cold VM backup download 2021-02-14 06:59:01 UTC
oVirt gerrit 112253 0 master MERGED core: introduce AddVolumeBitmapCommand 2021-02-14 06:59:01 UTC
oVirt gerrit 112573 0 master MERGED core: drop checkpoint_xml from vm_checkpoints table 2021-02-14 06:59:01 UTC
oVirt gerrit 112574 0 master MERGED core: remove checkpoint XML update when deleting a VM checkpoint 2021-02-14 06:59:01 UTC
oVirt gerrit 112575 0 master MERGED core: redefine checkpoints without checkpoint XML 2021-02-14 06:59:02 UTC

Description Eyal Shenitzky 2020-10-26 11:40:22 UTC 
Description of problem:

Currently, VM backup (full/incremental) can be taken only when the VM is running.
Backup of a powered-off VM is also needed since the backup application that uses incremental backup API cannot tell what is the status of the VM when performing a backup operation.

The engine should supply the option to perform full/incremental VM backup for running and non-running VMs under the same API so it will be transparent to the backup application


Version-Release number of selected component (if applicable):
4.4.4_master

How reproducible:


Steps to Reproduce:
1. Create a VM with disks that supported incremental backup
2. Try to create a full/incremental backup to the VM while it is powered-off

Actual results:
Operation is blocked

Expected results:
Full or incremental VM backup should be allowed when using new incremental backup API

Additional info:
Comment 1 Eyal Shenitzky 2020-11-02 15:50:02 UTC 
*** Bug 1892670 has been marked as a duplicate of this bug. ***
Comment 2 Ilan Zuckerman 2021-03-09 07:30:37 UTC 
Verified on rhv-release-4.4.5-7-001.noarch
According the test plan:
RHEVM-27575
RHEVM-27576
Comment 3 Sandro Bonazzola 2021-03-18 15:14:38 UTC 
This bugzilla is included in oVirt 4.4.5 release, published on March 18th 2021.

Since the problem described in this bug report should be resolved in oVirt 4.4.5 release, it has been closed with a resolution of CURRENT RELEASE.

If the solution does not work for you, please open a new bug report.
Comment 4 Sandro Bonazzola 2021-03-22 12:55:40 UTC 
This bugzilla is included in oVirt 4.4.5 release, published on March 18th 2021.

Since the problem described in this bug report should be resolved in oVirt 4.4.5 release, 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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