feat(metrics): add scheduler and git operation OTel metrics#240
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feat(metrics): add scheduler and git operation OTel metrics#240
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Add OpenTelemetry metrics for operational visibility into the job scheduler and git strategy: Scheduler metrics: - cachew.scheduler.queue_depth: pending jobs gauge - cachew.scheduler.active_workers: running workers gauge - cachew.scheduler.active_clones: clone-specific concurrency gauge - cachew.scheduler.jobs_total: counter by job type and status - cachew.scheduler.job_duration_seconds: histogram by job type and status Git operation metrics: - cachew.git.operations_total: counter by operation/upstream/status - cachew.git.operation_duration_seconds: histogram for clone/fetch/snapshot - cachew.git.requests_total: HTTP request counter by type All metrics flow through the existing OTel/Prometheus pipeline and are scraped on :9102/metrics automatically. Co-authored-by: Amp <amp@ampcode.com> Amp-Thread-ID: https://ampcode.com/threads/T-019d404e-21ec-723a-b211-c619925dd12e
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stuartwdouglas
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Mar 30, 2026
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Summary
Add OpenTelemetry metrics for operational visibility into the job scheduler and git strategy. These are the first custom application-level metrics in cachew — all prior OTel usage was limited to the otelhttp middleware.
Scheduler metrics
Job types: clone, fetch, snapshot, repack, other.
Git operation metrics
Context
Part of the operational hardening effort. The immediate goal is visibility into worker utilization and queue depth so we can detect saturation (e.g. clone storms from service accounts) before it impacts users.
All metrics flow through the existing OTel/Prometheus pipeline and are scraped on :9102/metrics automatically.