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feat(supervisor): workload create duration histogram with backend and outcome labels#3928

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feat/workload-create-metric-tri-10867
Jun 12, 2026
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feat(supervisor): workload create duration histogram with backend and outcome labels#3928
myftija merged 1 commit into
mainfrom
feat/workload-create-metric-tri-10867

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@myftija myftija commented Jun 12, 2026

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Adds a workload_create_duration_seconds Prometheus histogram to the supervisor, observed around the workload manager create() call:

  • backend label: kubernetes | compute | docker — set once from the configured workload manager
  • outcome label: success | error — the per-outcome counts double as a create error rate

Registered on the supervisor's existing metrics registry, so it's exposed on the existing /metrics endpoint with no config changes.

Notes:

  • Covers cold creates only; warm starts and restores return before reaching create().
  • A create may include backend-internal retries, so one observation can span multiple attempts.
  • Fixed low cardinality: 2 active label sets per deployment × 10 buckets.

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Latest commit: 18d3249

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.server-changes/workload-create-duration-metric.md (1)

1-6: LGTM!

apps/supervisor/src/index.ts (6)

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61-61: LGTM!


163-163: LGTM!

Also applies to: 166-166, 169-169


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524-527: LGTM!


Walkthrough

This pull request adds observability to workload creation operations in the supervisor by instrumenting the process with a Prometheus histogram metric. The change introduces a new workload_create_duration_seconds histogram that records the duration of each workload creation attempt, labeled with the backend type (compute, kubernetes, or docker) and outcome (success or error). The supervisor now tracks which backend implementation is active and records metric observations on both successful and failed creation paths.

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Check name Status Explanation
Title check ✅ Passed The title clearly and concisely describes the main change: adding a workload create duration histogram metric with backend and outcome labels to the supervisor.
Description check ✅ Passed The description covers the core functionality and design decisions but does not include all template sections (checklist, testing, changelog, screenshots), though these may not all be required.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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Comment thread .server-changes/workload-create-duration-metric.md
@myftija myftija merged commit 8b40571 into main Jun 12, 2026
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@myftija myftija deleted the feat/workload-create-metric-tri-10867 branch June 12, 2026 16:38
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