feat(controller): expose bucket class on BucketClaim Workloads by harshitrwt · Pull Request #3501 · cozystack/cozystack

Harshit Rawat (harshitrwt) · 2026-07-31T10:44:53Z

What this PR does

WorkloadMonitorReconciler.reconcileBucketClaimForMonitor builds a Workload for each BucketClaim but never read spec.bucketClassName, so nothing on the resulting Workload told a consumer which bucket class was in use (e.g. an encrypted class vs. a plain one). This PR reads BucketClaim.spec.bucketClassName and sets it as a workloads.cozystack.io/bucket-class label on the Workload, following the same workloads.cozystack.io/* labeling convention already used for KubeVirt instance-type/profile metadata elsewhere in this controller. A regression test (TestReconcileBucketClaim_BucketClassLabelPropagated) asserts the label is present with the correct value.

Closes #3419

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Release note

feat(controller): expose bucket class on BucketClaim Workloads via the workloads.cozystack.io/bucket-class label

Summary by CodeRabbit

New Features
- Workloads created from ready BucketClaims include the associated bucket class label when a valid value is specified.
Bug Fixes
- Invalid or empty bucket class values are omitted from Workloads.
- Stale bucket class labels are removed when the associated claim does not provide a valid value.

gemini-code-assist · 2026-07-31T10:44:56Z

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Reviewing files that changed from the base of the PR and between f41a500 and ffb6564.

📒 Files selected for processing (2)

internal/controller/workloadmonitor_controller.go
internal/controller/workloadmonitor_controller_test.go

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internal/controller/workloadmonitor_controller_test.go
internal/controller/workloadmonitor_controller.go

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📝 Walkthrough

Walkthrough

BucketClaim reconciliation removes any inherited bucket-class label. It adds the label only when BucketClaim.Spec.BucketClassName is non-empty and passes Kubernetes label-value validation. Invalid values are logged and omitted.

Changes

Bucket class propagation

Layer / File(s)	Summary
Workload label propagation `internal/controller/workloadmonitor_controller.go`, `internal/controller/workloadmonitor_controller_test.go`	The reconciler validates bucket-class values before adding the `workloads.cozystack.io/bucket-class` label. It logs and omits invalid values, and removes a stale label when the value is invalid. Tests cover valid propagation, invalid values, and stale-label removal.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Merge Risk: ⚪ Minimal · up to ffb65

Workloads receive valid bucket-class labels, while empty or invalid classes remove stale labels. The change is mergeable subject to normal test checks.

Security Architecture Review

Security architecture risk: 🔵 Low · up to f41a5

The change is limited to metadata and does not establish a new authorization or storage-control path. However, generated Workloads can retain misleading bucket-class labels after an empty or invalid class value, so the label should not be treated as authoritative evidence of encryption or the current class.

Retained concerns

Low · architecture · observed: The new bucket-class metadata contract is not authoritatively maintained: empty or invalid spec values leave an inherited or previously generated label intact. Consumers can therefore observe a class value that does not match the current BucketClaim spec. Label preservation predates the PR, but the newly generated field introduces this lifecycle inconsistency; an encryption or authorization bypass is not established.

Security review details

Security Blast Radius

inferred — The affected surface is the metadata of BucketClaim-derived Workloads selected by monitors. Each output remains in its source namespace. A principal permitted to modify a selected BucketClaim can influence its generated metadata; effective permissions and downstream readers were not established.

Security Findings and Attack Paths

inferred — A valid class can be written to a Workload and survive a subsequent empty or label-incompatible spec value. The pinned schema does not forbid that transition. This supports misleading metadata, but no security-sensitive consumer or resulting control bypass was evidenced; production admission restrictions remain unverified.

Trust Boundaries and Controls

observed — The controller promotes a source spec value into generated Workload metadata after syntax validation. Valid spec values override inherited labels, but the empty and invalid branches do not establish exclusive controller ownership of this key.

Resilience and Maintainability Implications

observed — Metrics failures do not prevent bucket Workload reconciliation. Individual Workload write errors are logged and processing continues; periodic reconciliation is requested while BucketClaims remain. These recovery paths do not repair a stale class label when the current class is empty or invalid.

Hardening Proposals

proposed — Treat the bucket-class key as controller-owned: remove inherited or stored values before conditionally assigning the validated spec value. Define it as descriptive metadata rather than a security attestation, and validate update and rollback behavior before consumers rely on it for security decisions.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: exposing the bucket class on Workloads created from BucketClaims. It is concise and specific.
Linked Issues check	✅ Passed	For issue `#3419`, `reconcileBucketClaimForMonitor` removes inherited bucket-class labels and applies `workloads.cozystack.io/bucket-class` from `BucketClaim.Spec.BucketClassName` only after Kubernetes …
Out of Scope Changes check	✅ Passed	The changes are limited to BucketClaim Workload reconciliation and focused tests for label propagation, invalid values, and stale-label removal. These changes support issue `#3419`. No unrelated product…

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Inline comments:
In `@internal/controller/workloadmonitor_controller.go`:
- Around line 331-334: Update the bucket-class label assignment in the workload
reconciliation flow around BucketClassName so the value is validated or
truncated to the Kubernetes label-value limit before assigning
workloads.cozystack.io/bucket-class. Preserve the existing non-empty check, and
ensure invalid or overlong BucketClassName values cannot cause
Ctrl.CreateOrUpdate to fail.

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internal/controller/workloadmonitor_controller.go
internal/controller/workloadmonitor_controller_test.go

github-actions · 2026-09-30T04:49:40Z

This PR has had no activity for 60 days and was marked lifecycle/stale.
It will be closed in 14 days unless commented or labelled lifecycle/frozen.

Aleksei Sviridkin (lexfrei)

Harshit Rawat (@harshitrwt) NOT LGTM, one thing left: the invalid-value branch has no test. The change itself is what #3419 asks for and I'm fine with the shape.

The guard added in the second commit is the part that matters in production. Without it an invalid label value makes the API server reject the whole Workload write, so the Workload is not created or updated at all, not just missing a label. The new test only covers a valid class name. I replaced the condition with true || len(errs) == 0 and go test ./internal/controller/ stays green. The fake client does not validate label values, so please assert the outcome directly: a BucketClaim whose class name is not a valid label value still gets its Workload, without the bucket-class label.

A non-blocking note. Class names are object names and can be up to 253 characters, while a label value stops at 63. The seaweedfs app names pool classes <namespace>-<pool>-lock, so a long tenant name plus a long pool name loses the label, with only an Info log on every reconcile. That is acceptable for now, but worth a line in the commit message so nobody reads a missing label as "no class".

CI on this head: every workflow from 2026-07-31 ended with zero jobs, and the E2E failure on 2026-08-30 is from before the fork E2E lane was fixed on 2026-09-27. None of it is caused by the diff. A push will get a fresh run.

Signed-off-by: harshitrwt <[email protected]>

…a valid label value Signed-off-by: harshitrwt <[email protected]>

…ClaimForMonitor A BucketClassName longer than 63 chars (valid as a Kubernetes object name, up to 253 chars) is not a valid label value, so the bucket-class label is skipped with an Info log rather than failing the Workload write. This can happen with SeaweedFS pool class names (<namespace>-<pool>-lock) when the tenant and pool names are both long -- a missing label in that case does not mean no class was set. Signed-off-by: harshitrwt <[email protected]>

Harshit Rawat (harshitrwt) · 2026-09-30T18:15:51Z

Added TestReconcileBucketClaim_InvalidBucketClassSkipsLabel , it asserts the Workload is still created (no error, object exists) when BucketClassName is an invalid label value (64 chars, over the 63-char limit), and that the bucket-class label is specifically absent in that case.

Also added the SeaweedFS caveat to the commit message so a missing label isn't misread as "no class set."

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Inline comments:
Review comments at @internal/controller/workloadmonitor_controller.go:
- Line 329: In the workload mutation path, remove the bucket-class label after
copying source labels and before validating or applying bc.Spec.BucketClassName,
so an invalid value cannot leave a conflicting label on a newly created or
existing Workload. Add a test with an invalid class and a conflicting source
label to verify the label is absent.

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…s before applying validated value maps.Copy(workload.Labels, bc.Labels) can bring in a workloads.cozystack.io/bucket-class label directly set on the BucketClaim, which would survive unmodified when spec.bucketClassName is empty or invalid, leaving the Workload reporting a class that does not match the source BucketClaim. Signed-off-by: harshitrwt <[email protected]>

Aleksei Sviridkin (lexfrei)

Harshit Rawat (@harshitrwt) LGTM, thanks. The new tests catch both the guard and the stale-label cleanup when I break them.

Harshit Rawat (harshitrwt) requested review from Andrei Kvapil (kvaps), Aleksei Sviridkin (lexfrei), Timofei Larkin (lllamnyp) and Kirill Ilin (sircthulhu) as code owners July 31, 2026 10:44

github-actions Bot added area/uncategorized PR auto-labeler could not map title scope to a known area/*; please review kind/feature Categorizes issue or PR as related to a new feature size/M This PR changes 30-99 lines, ignoring generated files labels Jul 31, 2026

dosubot Bot added the area/monitoring Issues or PRs related to the monitoring stack (vlogs, vmstack, grafana, workloadmonitor) label Jul 31, 2026

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Comment thread internal/controller/workloadmonitor_controller.go Resolved

github-actions Bot added the lifecycle/stale Denotes an issue or PR has remained open with no activity and has become stale label Sep 30, 2026

Aleksei Sviridkin (lexfrei) requested changes Sep 30, 2026

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Harshit Rawat (harshitrwt) added 3 commits September 30, 2026 23:17

feat(controller): expose bucket class on BucketClaim Workloads

0c37fff

Signed-off-by: harshitrwt <[email protected]>

fix(controller): skip bucket-class label when BucketClassName is not …

882929f

…a valid label value Signed-off-by: harshitrwt <[email protected]>

Harshit Rawat (harshitrwt) force-pushed the fix/3419-bucket-class-label branch from 6d3f256 to f41a500 Compare September 30, 2026 18:13

Harshit Rawat (harshitrwt) requested review from IvanHunters and myasnikovdaniil as code owners September 30, 2026 18:13

github-actions Bot added size/L This PR changes 100-499 lines, ignoring generated files and removed size/M This PR changes 30-99 lines, ignoring generated files labels Sep 30, 2026

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Comment thread internal/controller/workloadmonitor_controller.go Resolved

Aleksei Sviridkin (lexfrei) approved these changes Sep 30, 2026

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Aleksei Sviridkin (lexfrei) enabled auto-merge September 30, 2026 18:41

Aleksei Sviridkin (lexfrei) mentioned this pull request Sep 30, 2026

ci(api-review-gate): publish the gate as a commit status #3440

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Aleksei Sviridkin (lexfrei) merged commit 15f57be into cozystack:main Sep 30, 2026
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feat(controller): expose bucket class on BucketClaim Workloads - #3501

feat(controller): expose bucket class on BucketClaim Workloads#3501
Aleksei Sviridkin (lexfrei) merged 4 commits into
cozystack:mainfrom
harshitrwt:fix/3419-bucket-class-label

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What this PR does

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