fix: make extensionRef to be optional

api/v1/inferencepool_types.go

@@ -70,8 +70,6 @@ type InferencePoolSpec struct {
 	TargetPortNumber int32 `json:"targetPortNumber"`
 
 	// Extension configures an endpoint picker as an extension service.
-	//
-	// +kubebuilder:validation:Required
 	ExtensionRef *Extension `json:"extensionRef,omitempty"`
 }
 

apix/v1alpha2/inferencepool_types.go

@@ -78,8 +78,6 @@ type InferencePoolSpec struct {
 // This type is intended to be a union of mutually exclusive configuration options that we may add in the future.
 type EndpointPickerConfig struct {
 	// Extension configures an endpoint picker as an extension service.
-	//
-	// +kubebuilder:validation:Required
 	ExtensionRef *Extension `json:"extensionRef,omitempty"`
 }
 

config/crd/bases/inference.networking.k8s.io_inferencepools.yaml

@@ -130,7 +130,6 @@ spec:
                 minimum: 1
                 type: integer
             required:
-            - extensionRef
             - selector
             - targetPortNumber
             type: object

config/crd/bases/inference.networking.x-k8s.io_inferencepools.yaml

@@ -130,7 +130,6 @@ spec:
                 minimum: 1
                 type: integer
             required:
-            - extensionRef
             - selector
             - targetPortNumber
             type: object

conformance/conformance.go

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 // Package conformance contains the core setup and execution logic
-// for the Gateway API Inference ExtensionRef conformance test suite.
+// for the Gateway API Inference Extension conformance test suite.
 package conformance
 
 import (
@@ -54,7 +54,7 @@ import (
 )
 
 // GatewayLayerProfileName defines the name for the conformance profile that tests
-// the Gateway API layer aspects of the Inference ExtensionRef (e.g., InferencePool, InferenceObjective CRDs).
+// the Gateway API layer aspects of the Inference Extension (e.g., InferencePool, InferenceObjective CRDs).
 // Future profiles will cover EPP and ModelServer layers.
 const GatewayLayerProfileName confsuite.ConformanceProfileName = "Gateway"
 
@@ -66,7 +66,7 @@ const GatewayLayerProfileName confsuite.ConformanceProfileName = "Gateway"
 const SupportInferencePool features.FeatureName = "SupportInferencePool"
 
 // InferenceCoreFeatures defines the core features that implementations
-// of the "Gateway" profile for the Inference ExtensionRef MUST support.
+// of the "Gateway" profile for the Inference Extension MUST support.
 var InferenceCoreFeatures = sets.New(
 	features.SupportGateway, // This is needed to ensure manifest gets applied during setup.
 	features.SupportHTTPRoute,
@@ -104,7 +104,7 @@ func DefaultOptions(t *testing.T) confsuite.ConformanceOptions {
 	// Add APIExtensions types (for CRDs)
 	require.NoError(t, apiextensionsv1.AddToScheme(scheme), "failed to add apiextensionsv1 types to scheme")
 
-	// Register Inference ExtensionRef API types
+	// Register Inference Extension API types
 	t.Logf("Attempting to install inferencev1alpha2 types into scheme from package: %s", inferencev1alpha2.GroupName)
 	require.NoError(t, inferencev1alpha2.Install(scheme), "failed to install inferencev1alpha2 types into scheme")
 	t.Logf("Attempting to install inferencev1 types into scheme from package: %s", inferencev1.GroupName)
@@ -134,7 +134,7 @@ func DefaultOptions(t *testing.T) confsuite.ConformanceOptions {
 		*confflags.ImplementationContact,
 	)
 
-	// Inference ExtensionRef Specific Report Fields
+	// Inference Extension Specific Report Fields
 	inferenceExtensionVersion := "v0.3.0"
 	_ = inferenceExtensionVersion // Avoid unused variable error until implemented
 
@@ -189,15 +189,15 @@ func DefaultOptions(t *testing.T) confsuite.ConformanceOptions {
 	return opts
 }
 
-// RunConformance runs the Inference ExtensionRef conformance tests using default options.
+// RunConformance runs the Inference Extension conformance tests using default options.
 func RunConformance(t *testing.T) {
 	RunConformanceWithOptions(t, DefaultOptions(t))
 }
 
-// RunConformanceWithOptions runs the Inference ExtensionRef conformance tests with specific options.
+// RunConformanceWithOptions runs the Inference Extension conformance tests with specific options.
 func RunConformanceWithOptions(t *testing.T, opts confsuite.ConformanceOptions) {
 	t.Helper()
-	t.Logf("Running Inference ExtensionRef conformance tests with GatewayClass %s", opts.GatewayClassName)
+	t.Logf("Running Inference Extension conformance tests with GatewayClass %s", opts.GatewayClassName)
 	logDebugf(t, opts.Debug, "RunConformanceWithOptions: BaseManifests path being used by opts: %q", opts.BaseManifests)
 
 	// Register the GatewayLayerProfile with the suite runner.
@@ -211,13 +211,13 @@ func RunConformanceWithOptions(t *testing.T, opts confsuite.ConformanceOptions)
 
 	SetupConformanceTestSuite(t, cSuite, opts, tests.ConformanceTests)
 
-	t.Log("Running Inference ExtensionRef conformance tests against all registered tests")
+	t.Log("Running Inference Extension conformance tests against all registered tests")
 	err = cSuite.Run(t, tests.ConformanceTests)
 	require.NoError(t, err, "error running conformance tests")
 
 	// Generate and write the report if requested.
 	if opts.ReportOutputPath != "" {
-		t.Log("Generating Inference ExtensionRef conformance report")
+		t.Log("Generating Inference Extension conformance report")
 		report, err := cSuite.Report() // Use the existing report generation logic.
 		require.NoError(t, err, "error generating conformance report")
 		inferenceReport := GatewayAPIInferenceExtensionConformanceReport{

conformance/conformancereport.go

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 // Package conformance contains the core setup and execution logic
-// for the Gateway API Inference ExtensionRef conformance test suite.
+// for the Gateway API Inference Extension conformance test suite.
 package conformance
 
 import (

conformance/tests/main.go

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// Package tests is the root package for all Gateway API Inference ExtensionRef
+// Package tests is the root package for all Gateway API Inference Extension
 // conformance test implementations.
 package tests
 
@@ -30,6 +30,6 @@ import (
 )
 
 // ConformanceTests holds all the conformance tests definitions for the
-// Gateway API Inference ExtensionRef suite. Tests are registered from other packages
+// Gateway API Inference Extension suite. Tests are registered from other packages
 // using init() functions like the one in the basic package.
 var ConformanceTests []suite.ConformanceTest

conformance/utils/assertions.go

@@ -15,10 +15,10 @@ limitations under the License.
 */
 
 // Package assertions contains custom assertion helper functions used within
-// the Gateway API Inference ExtensionRef conformance test suite.
+// the Gateway API Inference Extension conformance test suite.
 package assertions
 
-// TODO: Implement custom assertion functions specific to Inference ExtensionRef testing.
+// TODO: Implement custom assertion functions specific to Inference Extension testing.
 // Examples might include:
 // - Asserting specific fields or structures within an inference API response body.
 // - Asserting specific metrics reported by mock model servers or EPPs.

pkg/epp/controller/inferencepool_reconciler_test.go

@@ -80,9 +80,10 @@ func TestInferencePoolReconciler(t *testing.T) {
 	pool1 := utiltest.MakeInferencePool("pool1").
 		Namespace("pool1-ns").
 		Selector(selector_v1).
+		ExtensionRef("epp-service").
 		TargetPortNumber(8080).ObjRef()
 	pool1.SetGroupVersionKind(gvk)
-	pool2 := utiltest.MakeInferencePool("pool2").Namespace("pool2-ns").ObjRef()
+	pool2 := utiltest.MakeInferencePool("pool2").Namespace("pool2-ns").ExtensionRef("epp-service").ObjRef()
 	pool2.SetGroupVersionKind(gvk)
 
 	// Set up the scheme.
@@ -219,8 +220,9 @@ func TestXInferencePoolReconciler(t *testing.T) {
 	pool1 := utiltest.MakeXInferencePool("pool1").
 		Namespace("pool1-ns").
 		Selector(selector_v1).
+		ExtensionRef("epp-service").
 		TargetPortNumber(8080).ObjRef()
-	pool2 := utiltest.MakeXInferencePool("pool2").Namespace("pool2-ns").ObjRef()
+	pool2 := utiltest.MakeXInferencePool("pool2").Namespace("pool2-ns").ExtensionRef("epp-service").ObjRef()
 	pool1.SetGroupVersionKind(gvk)
 	pool2.SetGroupVersionKind(gvk)
 

pkg/epp/flowcontrol/controller/doc.go

@@ -47,7 +47,7 @@ limitations under the License.
 // # Architectural Deep Dive: The `EnqueueAndWait` Model
 //
 // A fundamental design choice is the synchronous, blocking `EnqueueAndWait` method. In the context of the Gateway API
-// Inference ExtensionRef's Endpoint Picker (EPP), which operates as an Envoy External Processing (`ext_proc`) server, this
+// Inference Extension's Endpoint Picker (EPP), which operates as an Envoy External Processing (`ext_proc`) server, this
 // model is deliberately chosen for its simplicity and robustness.
 //
 //   - Alignment with `ext_proc`: The `ext_proc` protocol is stream-based. A single goroutine within the EPP manages the

pkg/epp/metrics/metrics.go

@@ -231,7 +231,7 @@ var (
 		prometheus.GaugeOpts{
 			Subsystem: InferenceExtension,
 			Name:      "info",
-			Help:      metricsutil.HelpMsgWithStability("General information of the current build of Inference ExtensionRef.", compbasemetrics.ALPHA),
+			Help:      metricsutil.HelpMsgWithStability("General information of the current build of Inference Extension.", compbasemetrics.ALPHA),
 		},
 		[]string{"commit", "build_ref"},
 	)

test/e2e/epp/e2e_suite_test.go

@@ -280,7 +280,7 @@ func getYamlsFromModelServerManifest(modelServerManifestPath string) []string {
 	return modelServerManifestArray
 }
 
-// createCRDs creates the Inference ExtensionRef CRDs used for testing.
+// createCRDs creates the Inference Extension CRDs used for testing.
 func createCRDs(k8sClient client.Client, crds map[string]string) {
 	for name, path := range crds {
 		ginkgo.By("Creating CRD resource from manifest: " + path)

test/e2e/epp/e2e_test.go

@@ -70,7 +70,7 @@ var _ = ginkgo.Describe("InferencePool", func() {
 		}, existsTimeout, interval).Should(gomega.Succeed())
 	})
 
-	ginkgo.When("The Inference ExtensionRef is running", func() {
+	ginkgo.When("The Inference Extension is running", func() {
 		ginkgo.It("Should route traffic to target model servers", func() {
 			verifyTrafficRouting()
 		})