fix: NUMA refit follow-ups from post-merge review - #2817
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The annotation patch ran with context.Background() while the refit holds the allocation lock that Filter also takes, so an unreachable API server could stall scheduling far past the device plugin's own budget. The rebuild also collapsed init-container usage unconditionally, which re-inflated a pod whose usage had already been shrunk back to the init peak. Mirror the pod's current accounting shape instead, as PodManager.AddPod already does on a re-add. Signed-off-by: Saiyam Pathak <saiyam911@gmail.com>
…ad CA Kubelet builds AvailableDeviceIDs as a superset of MustIncludeDeviceIDs, so restricting the refit to MustInclude shrank the candidate pool below the requested device count and refused refits that would have fit. An unreadable or unusable CA bundle also fell back to the system trust store, where verification cannot succeed against the scheduler's self-signed certificate; fail instead. The client is now built per refit so a rotated CA Secret is picked up without a restart. Signed-off-by: Saiyam Pathak <saiyam911@gmail.com>
The templates branch on numaRefit.caSecret but values.yaml never declared it. Host-network device plugins also need dnsPolicy: ClusterFirstWithHostNet to resolve the default refit endpoint, which is a Service name. Signed-off-by: Saiyam Pathak <saiyam911@gmail.com>
📝 WalkthroughWalkthroughThe NUMA refit flow gains host-network DNS handling, Secret-based CA configuration, stricter TLS errors, complete device candidate forwarding, bounded annotation patches, and preserved steady-state accounting after init-container release. ChangesNUMA refit flow
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to A timeout during the scheduler update can leave pod accounting inconsistent with the device assignment if the update actually committed, potentially causing incorrect quota or allocation decisions; this should be fixed before merge. The per-refit client may also retain idle connections, which requires owner awareness or follow-up. Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 10 functions across 5 files. (2 skipped: 2 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@pkg/device-plugin/nvidiadevice/nvinternal/plugin/numa_refit_client.go`:
- Around line 97-100: Update the http.Transport created in the NUMA refit client
to set DisableKeepAlives to true, ensuring this one-request client does not
retain completed scheduler connections in its idle pool.
In `@pkg/scheduler/numa_refit_handler.go`:
- Around line 55-58: Update the patch failure path in the NUMA refit handler to
re-read the authoritative pod via the client after an ambiguous Patch error and
inspect its annotations before restoring old quota and device accounting;
preserve the new reservation when the API server committed the patch. Add a
regression test covering a delayed response beyond refitPatchTimeout and
verifying accounting remains aligned with the persisted device annotations.
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📒 Files selected for processing (7)
charts/hami/templates/device-plugin/daemonsetnvidia.yamlcharts/hami/values.yamlpkg/device-plugin/nvidiadevice/nvinternal/plugin/numa_refit_client.gopkg/device-plugin/nvidiadevice/nvinternal/plugin/numa_refit_client_test.gopkg/device-plugin/nvidiadevice/nvinternal/plugin/server_numa_alignment_test.gopkg/scheduler/numa_refit_handler.gopkg/scheduler/numa_refit_handler_test.go
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: FouoF, saiyam1814 The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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3 participants
What type of PR is this?
/kind bug
What this PR does / why we need it:
Fixes found while reviewing the NUMA refit (#2731) after it merged.
Scheduler:
context.Background()while holding the allocation lock thatFilteralso takes, and the kube client sets no timeout, so a slow API server could block scheduling. It is now bounded.CollapseInitContainerUsageeven for pods whose init-container usage was already released, pushing usage back to the init peak. It now keeps the shrunk shape.Device plugin:
MustIncludeDeviceIDs, but kubelet buildsAvailableDeviceIDsas a superset of it, so the pool could end up smaller than the requested device count.Helm:
numaRefit.caSecretis now declared invalues.yaml(the templates already used it), and host-network device plugins getdnsPolicy: ClusterFirstWithHostNetso the default refit endpoint resolves.Which issue(s) this PR fixes:
Follow-up to #2731 / #2080.
Special notes for your reviewer:
The accounting test fails without its fix (checked by reverting it). Chart changes verified with
helm template.Not included, because they need more than a small patch: the allocation lock does not cover the pod informer handlers, so a refit racing
onDelPodcan double-count quota;releaseContainerUsagereleases raw per-container amounts against a snapshot built from collapsed aggregates; and each refit builds usage for every node to read one. Happy to open an issue for these.AI assistance disclosure: written primarily by Claude Code, directed and reviewed by me.
Does this PR introduce a user-facing change?: