CLVM enhancements and fixes by Pearl1594 · Pull Request #12617 · apache/cloudstack

Pearl1594 · 2026-02-09T19:47:40Z

Description

This PR enhances the existing CLVM implementation which was based on the deprecated CLVM technology which was based on corosync/pacemaker. With RHEL 7 having reached EOL, CLVM seems to be broken. CLVM supports RAW volumes on LVM , where as CLVM_NG support QCOW2 on LVM.

Further details: https://cwiki.apache.org/confluence/display/CLOUDSTACK/Modernized+CLVM%3A+Enhancements+and+CLVM_NG+support

NOTE: On testing - it was identified that incremental snapshots for clvm-ng do not work as expected. As of now it's been removed from scope. So, CLVM and CLVM_NG would only support full snapshots.

Types of changes

Breaking change (fix or feature that would cause existing functionality to change)
New feature (non-breaking change which adds functionality)
Bug fix (non-breaking change which fixes an issue)
Enhancement (improves an existing feature and functionality)
Cleanup (Code refactoring and cleanup, that may add test cases)
Build/CI
Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

Major
Minor

Bug Severity

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

codecov · 2026-02-09T20:01:42Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 3.68%. Comparing base (d3e1976) to head (df61d6f).
⚠️ Report is 15 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (d3e1976) and HEAD (df61d6f). Click for more details.

HEAD has 1 upload less than BASE

Flag BASE (d3e1976) HEAD (df61d6f)

unittests 1 0

Additional details and impacted files

@@              Coverage Diff              @@
##               main   #12617       +/-   ##
=============================================
- Coverage     17.90%    3.68%   -14.23%     
=============================================
  Files          5938      454     -5484     
  Lines        532864    38798   -494066     
  Branches      65192     7151    -58041     
=============================================
- Hits          95392     1428    -93964     
+ Misses       426793    37183   -389610     
+ Partials      10679      187    -10492

Flag	Coverage Δ
uitests	`3.67% <ø> (+<0.01%)`	⬆️
unittests	`?`

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
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…of running vm

Pearl1594 · 2026-02-11T19:43:29Z

@blueorangutan package

blueorangutan · 2026-02-11T19:44:04Z

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

blueorangutan · 2026-02-11T20:28:42Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 16801

weizhouapache · 2026-02-17T15:02:13Z

        UserVmVO vm = userVmDao.findById(vmId);
        String cantHandleLog = String.format("Default VM snapshot cannot handle VM snapshot for [%s]", vm);
+
+        if (isRunningVMVolumeOnCLVMStorage(vm, cantHandleLog)) {


@Pearl1594
what's the image format on CLVM ? RAW or QCOW2 ?

RAW @weizhouapache

codecov · 2026-02-17T15:24:41Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 3.89%. Comparing base (6b831f5) to head (f29d8a2).
⚠️ Report is 24 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (6b831f5) and HEAD (f29d8a2). Click for more details.

HEAD has 1 upload less than BASE

Flag BASE (6b831f5) HEAD (f29d8a2)

unittests 1 0

Additional details and impacted files

@@              Coverage Diff              @@
##               main   #12617       +/-   ##
=============================================
- Coverage     18.10%    3.89%   -14.21%     
=============================================
  Files          6037      464     -5573     
  Lines        542887    40591   -502296     
  Branches      66480     7733    -58747     
=============================================
- Hits          98279     1581    -96698     
+ Misses       433561    38807   -394754     
+ Partials      11047      203    -10844

Flag	Coverage Δ
uitests	`3.81% <ø> (+0.29%)`	⬆️
unittests	`?`

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

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Pearl1594 · 2026-02-18T16:33:12Z

@blueorangutan package

blueorangutan · 2026-02-18T16:40:04Z

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

blueorangutan · 2026-02-18T17:32:01Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 16875

Pearl1594 · 2026-02-18T20:23:11Z

@blueorangutan package

blueorangutan · 2026-02-18T20:24:04Z

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

blueorangutan · 2026-02-18T21:16:21Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 16877

…ached volumes

blueorangutan · 2026-05-15T02:02:51Z

Packaging result [SF]: ✖️ el8 ✖️ el9 ✖️ debian ✖️ suse15. SL-JID 17864

Pearl1594 · 2026-05-15T02:10:28Z

@blueorangutan package

blueorangutan · 2026-05-15T02:12:05Z

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

blueorangutan · 2026-05-15T02:54:53Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 17865

Pearl1594 · 2026-05-20T12:13:00Z

@blueorangutan package

blueorangutan · 2026-05-20T12:14:05Z

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

blueorangutan · 2026-05-20T13:06:07Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 17936

github-actions · 2026-05-22T11:40:26Z

This pull request has merge conflicts. Dear author, please fix the conflicts and sync your branch with the base branch.

…-enhancements

Pearl1594 · 2026-05-22T12:30:11Z

@blueorangutan package

blueorangutan · 2026-05-22T12:32:04Z

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

blueorangutan · 2026-05-22T13:21:44Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 17990

… 4.23

Pearl1594 · 2026-05-26T20:46:56Z

@blueorangutan package

blueorangutan · 2026-05-26T20:48:05Z

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

blueorangutan · 2026-05-26T21:32:39Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 18048

sonarqubecloud · 2026-05-27T13:05:33Z

Quality Gate failed

Failed conditions
1 Security Hotspot
33.5% Coverage on New Code (required ≥ 40%)

See analysis details on SonarQube Cloud

Pearl1594 · 2026-05-27T14:27:21Z

@blueorangutan package

blueorangutan · 2026-05-27T14:28:05Z

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

boring-cyborg Bot added component:kvm component:storage labels Feb 9, 2026

CLVM enhancements and fixes

9e03f4b

Pearl1594 force-pushed the clvm-enhancements branch from 5fc1f12 to 9e03f4b Compare February 9, 2026 21:39

Pearl1594 added 2 commits February 10, 2026 19:48

add support for proper cleanup of snapshots and prevent vol snapshot …

96edadc

…of running vm

remove snap vol restriction for sunning vms

f9d8062

harikrishna-patnala added this to the 4.23.0 milestone Feb 17, 2026

weizhouapache reviewed Feb 17, 2026

View reviewed changes

Pearl1594 force-pushed the clvm-enhancements branch from a08e7a5 to df61d6f Compare February 17, 2026 15:04

refactor clvm code

43e9384

Pearl1594 force-pushed the clvm-enhancements branch from df61d6f to 43e9384 Compare February 17, 2026 15:16

boring-cyborg Bot added component:api component:compute component:orchestration labels Feb 17, 2026

add support for live migration

c9dd7ed

Pearl1594 force-pushed the clvm-enhancements branch from 3f900e8 to c9dd7ed Compare February 17, 2026 22:54

add support for migrating lvm lock

4984ee5

Pearl1594 added 2 commits February 19, 2026 15:42

clvm deletion called explicitly

190b201

made necessary changes to allow migration of lock and deletion of det…

8a7e48a

…ached volumes

winterhazel requested review from GutoVeronezi, JoaoJandre and winterhazel May 15, 2026 20:31

update pool setting when modified

f6a82ee

Pearl1594 force-pushed the clvm-enhancements branch from f6fde09 to f6a82ee Compare May 20, 2026 12:06

github-actions Bot added the status:has-conflicts label May 22, 2026

Merge branch 'main' of https://github.com/apache/cloudstack into clvm…

4730e59

…-enhancements

github-actions Bot removed the status:has-conflicts label May 22, 2026

Pearl Dsilva added 2 commits May 23, 2026 10:51

update log and timout

76a5e0a

fallback to full snapshots for clvm-ng - incremental not supported in…

c720340

… 4.23

Pearl1594 force-pushed the clvm-enhancements branch from 636867e to c720340 Compare May 26, 2026 20:31

expunge volume detail of lock host on vm expunge

ed48818

minor fix

f29d8a2

Conversation

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Description

Types of changes

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

Bug Severity

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

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Pearl1594 commented May 26, 2026

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blueorangutan commented May 26, 2026

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blueorangutan commented May 26, 2026

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sonarqubecloud Bot commented May 27, 2026

Quality Gate failed

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Pearl1594 commented May 27, 2026

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Reviewers

Pearl1594 commented Feb 9, 2026 •

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