fix(invocation): configure metrics exposure - #1371
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Included review availability: Your plan provides up to 12 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughThe invocation Helm chart now supports configurable Prometheus metrics and optional ServiceMonitor resources. The self-managed stack enables metrics for selected observability profiles. Tests cover enabled, disabled, customized, and invalid configurations. ChangesInvocation metrics exposure
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This change adds configurable invocation metrics exposure and optional monitoring resources without any identified merge-blocking risk; it is merge-ready after normal checks and review. Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Full details: Linked Issues checkExplanation The changes satisfy the coding objectives in [ Full details: Out of Scope Changes checkExplanation All changes support metrics exposure for the invocation service, including chart configuration, ServiceMonitor handling, self-managed stack values, validation, and focused tests. No unrelated changes are present. Full details: Docstring CoverageExplanation 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. (3 skipped: 3 unsupported.)
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sbaum1994
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Inline comments:
In
`@deploy/helm/http-invocation/nvcf-invocation-service/templates/servicemonitor.yaml`:
- Line 28: Update the ServiceMonitor port configuration to always use the
Service’s named metrics port, or enforce validation that
invocation.metrics.serviceMonitor.port equals metrics; ensure the rendered
ServiceMonitor cannot reference any other port.
In
`@deploy/helm/http-invocation/nvcf-invocation-service/templates/validation.yaml`:
- Around line 23-24: Update the validation around invocation.metrics.port so
that when metrics are enabled it requires an integer value between 1 and 65535
inclusive, rejecting values outside the Kubernetes port range before rendering
the Service and containerPort fields.
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deploy/helm/http-invocation/nvcf-invocation-service/templates/configmap-env.yamldeploy/helm/http-invocation/nvcf-invocation-service/templates/deployment.yamldeploy/helm/http-invocation/nvcf-invocation-service/templates/service.yamldeploy/helm/http-invocation/nvcf-invocation-service/templates/servicemonitor.yamldeploy/helm/http-invocation/nvcf-invocation-service/templates/validation.yamldeploy/helm/http-invocation/nvcf-invocation-service/values.yamldeploy/helm/http-invocation/tests/metrics_config_test.shdeploy/stacks/self-managed/global.yaml.gotmpldeploy/stacks/self-managed/tests/invocation-tracing-baggage.sh
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Add chart values for the listener address, port, and optional ServiceMonitor. Enable the endpoint for self-managed control-plane observability while keeping ServiceMonitor ownership centralized in the observability stack. Closes #1366 Signed-off-by: Stephanie Baum <sbaum@nvidia.com>
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🎉 This PR is included in version helm-nvcf-invocation-service-v1.6.0 🎉 The release is available on GitHub release Your semantic-release bot 📦🚀 |
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TL;DR
Expose invocation metrics through explicit Helm values for the listener address, port, and optional ServiceMonitor. Enable the endpoint only for self-managed profiles that deploy control-plane observability.
Additional Details
The invocation process falls back to a loopback-only Prometheus listener when no application settings file is mounted. A Kubernetes Service can declare port 41337 in that state, but other pods cannot reach it.
The invocation chart now owns the full metrics configuration:
invocation.metrics.enabledcontrols the listener, container port, and Service port.invocation.metrics.bindAddressandinvocation.metrics.portconfigure the Prometheus endpoint.invocation.metrics.serviceMonitor.enabledcan create a chart-local ServiceMonitor when desired.The self-managed stack enables the endpoint for the
controlandallobservability profiles. Its central observability release continues to own the shared ServiceMonitor.Customer Release Notes
Invocation metrics exposure can now be configured through the Helm chart, allowing self-managed autoscaling and Prometheus scraping to reach the endpoint in cluster.
Plan Summary
When enabled, the invocation Deployment gains a generated ConfigMap volume, a metrics container port, and a matching Service port. The optional ServiceMonitor remains disabled in the self-managed stack because the observability stack already supplies one.
Usage
For the Reviewer
Please review the ownership split between the invocation chart and self-managed observability values. The listener configuration belongs to the invocation chart; the self-managed stack only chooses when to enable it.
For QA
QA is still needed as part of #1363's final k3d smoke-test run.
Tests run:
deploy/helm/http-invocation/tests/metrics_config_test.shdeploy/helm/http-invocation/tests/image_tag_appversion_test.shdeploy/stacks/self-managed/tests/invocation-tracing-baggage.shhelm lint deploy/helm/http-invocation/nvcf-invocation-service --set-string invocation.image.registry=registry.example.test --set-string invocation.image.repository=nvcf-invocation-servicegit diff --checkNotes
The self-managed stack currently pins the published invocation chart at version 1.5.6. This PR tests the stack values against the chart source in this repository, but the stack will not consume these new values until the updated chart is released and its pin is advanced. That release/pin update is intentionally separate from this source change.
Issues
Closes #1366
Related Pull Requests
Dependencies
No new or updated third-party dependencies. No license review or NOTICE update is required.
Checklist
Summary by CodeRabbit
New Features
Bug Fixes
Tests