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AngelaandJeff Luo
d4f2cf1c51
Part of #564 (Part 4, Fixes #564) - [x] Tests pass - [x] Appropriate changes to documentation are included in the PR ## Description This PR implements Part 4 of #564 by adding OpenTelemetry gauge instrumentation for `ate.workerpool.desired_workers` and `ate.workerpool.ready_workers` in `atecontroller`. ## Key Changes: * Added `ReadyReplicas int32` to `WorkerPoolStatus` with `+kubebuilder:printcolumn:name="Ready"` annotation in `pkg/api/v1alpha1/workerpool_types.go` and regenerated the CRD manifest. * Updated `WorkerPoolReconciler.syncStatus` to synchronize `dep.Status.ReadyReplicas` into `wp.Status.ReadyReplicas`. * Implemented `InitMetrics(meter)` registering `ate.workerpool.desired_workers` and `ate.workerpool.ready_workers` as OpenTelemetry Observable UpDownCounters (`{worker}`) with an asynchronous observer callback that samples controller-runtime's local informer cache (`r.Client.List`). * Labeled metric datapoints using centralized attributes `ateattr.WorkerPoolNamespaceKey` and `ateattr.WorkerPoolNameKey`. ## Testing * `go test -buildvcs=false ./cmd/ateapi/internal/controlapi/...` * `go test -buildvcs=false ./cmd/atenet/internal/router/...` * `make test` ## E2E Test * `./hack/create-kind-cluster.sh` * `./hack/install-ate-kind.sh --deploy-ate-system --deploy-demo-counter` * `./hack/run-e2e.sh ./internal/e2e/suites/metrics/...` --------- Co-authored-by: Jeff Luo <jeffluoo@google.com>