Each pod has independent loops to refresh metrics

Author: liu-cong

Diff for: Makefile

@@ -119,7 +119,7 @@ vet: ## Run go vet against code.
 
 .PHONY: test
 test: manifests generate fmt vet envtest ## Run tests.
-	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $$(go list ./... | grep -v /e2e) -coverprofile cover.out
+	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $$(go list ./... | grep -v /e2e) -race -coverprofile cover.out
 
 .PHONY: test-integration
 test-integration: manifests generate fmt vet envtest ## Run tests.

Diff for: cmd/epp/main.go

@@ -37,7 +37,6 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/manager"
 	"sigs.k8s.io/controller-runtime/pkg/metrics/filters"
 	"sigs.k8s.io/gateway-api-inference-extension/internal/runnable"
-	"sigs.k8s.io/gateway-api-inference-extension/pkg/epp/backend"
 	"sigs.k8s.io/gateway-api-inference-extension/pkg/epp/backend/vllm"
 	"sigs.k8s.io/gateway-api-inference-extension/pkg/epp/datastore"
 	"sigs.k8s.io/gateway-api-inference-extension/pkg/epp/metrics"
@@ -144,20 +143,16 @@ func run() error {
 	ctx := ctrl.SetupSignalHandler()
 
 	// Setup runner.
-	datastore := datastore.NewDatastore()
-	provider := backend.NewProvider(&vllm.PodMetricsClientImpl{}, datastore)
+	datastore := datastore.NewDatastore(ctx, &vllm.PodMetricsClientImpl{}, *refreshMetricsInterval, *refreshPrometheusMetricsInterval)
 	serverRunner := &runserver.ExtProcServerRunner{
 		GrpcPort:                                 *grpcPort,
 		DestinationEndpointHintMetadataNamespace: *destinationEndpointHintMetadataNamespace,
 		DestinationEndpointHintKey:               *destinationEndpointHintKey,
 		PoolName:                                 *poolName,
 		PoolNamespace:                            *poolNamespace,
-		RefreshMetricsInterval:                   *refreshMetricsInterval,
-		RefreshPrometheusMetricsInterval:         *refreshPrometheusMetricsInterval,
 		Datastore:                                datastore,
 		SecureServing:                            *secureServing,
 		CertPath:                                 *certPath,
-		Provider:                                 provider,
 		UseStreaming:                             useStreamingServer,
 	}
 	if err := serverRunner.SetupWithManager(ctx, mgr); err != nil {

Diff for: pkg/epp/backend/provider.go

@@ -190,7 +190,7 @@ func TestInferenceModelReconciler(t *testing.T) {
 				WithIndex(&v1alpha2.InferenceModel{}, datastore.ModelNameIndexKey, indexInferenceModelsByModelName).
 				Build()
 
-			datastore := datastore.NewFakeDatastore(nil, test.modelsInStore, pool)
+			datastore := datastore.NewFakeDatastore(t.Context(), &datastore.FakePodMetricsClient{}, nil, test.modelsInStore, pool)
 			reconciler := &InferenceModelReconciler{
 				Client:             fakeClient,
 				Record:             record.NewFakeRecorder(10),