Merge pull request #100754 from liggitt/warning-ga

Graduate WarningHeader feature to GA

pkg/features/kube_features.go

@@ -841,7 +841,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	genericfeatures.DryRun:                  {Default: true, PreRelease: featuregate.GA},
 	genericfeatures.ServerSideApply:         {Default: true, PreRelease: featuregate.GA},
 	genericfeatures.APIPriorityAndFairness:  {Default: true, PreRelease: featuregate.Beta},
-	genericfeatures.WarningHeaders:          {Default: true, PreRelease: featuregate.Beta},
+	genericfeatures.WarningHeaders:          {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.24
 
 	// features that enable backwards compatibility but are scheduled to be removed
 	// ...

staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/customresource_handler.go

@@ -958,12 +958,10 @@ func (r *crdHandler) getOrCreateServingInfoFor(uid types.UID, name string) (*crd
 
 		if v.Deprecated {
 			deprecated[v.Name] = true
-			if utilfeature.DefaultFeatureGate.Enabled(features.WarningHeaders) {
-				if v.DeprecationWarning != nil {
-					warnings[v.Name] = append(warnings[v.Name], *v.DeprecationWarning)
-				} else {
-					warnings[v.Name] = append(warnings[v.Name], defaultDeprecationWarning(v.Name, crd.Spec))
-				}
+			if v.DeprecationWarning != nil {
+				warnings[v.Name] = append(warnings[v.Name], *v.DeprecationWarning)
+			} else {
+				warnings[v.Name] = append(warnings[v.Name], defaultDeprecationWarning(v.Name, crd.Spec))
 			}
 		}
 	}

staging/src/k8s.io/apiserver/pkg/endpoints/installer.go

@@ -669,8 +669,6 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 
 		// accumulate endpoint-level warnings
 		var (
-			enableWarningHeaders = utilfeature.DefaultFeatureGate.Enabled(features.WarningHeaders)
-
 			warnings       []string
 			deprecated     bool
 			removedRelease string
@@ -702,9 +700,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 			} else {
 				handler = metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, handler)
 			}
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 
 			doc := "read the specified " + kind
 			if isSubresource {
@@ -730,9 +726,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 				doc = "list " + subresource + " of objects of kind " + kind
 			}
 			handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, restfulListResource(lister, watcher, reqScope, false, a.minRequestTimeout))
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 			route := ws.GET(action.Path).To(handler).
 				Doc(doc).
 				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
@@ -765,9 +759,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 				doc = "replace " + subresource + " of the specified " + kind
 			}
 			handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, restfulUpdateResource(updater, reqScope, admit))
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 			route := ws.PUT(action.Path).To(handler).
 				Doc(doc).
 				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
@@ -798,9 +790,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 				supportedTypes = append(supportedTypes, string(types.ApplyPatchType))
 			}
 			handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, restfulPatchResource(patcher, reqScope, admit, supportedTypes))
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 			route := ws.PATCH(action.Path).To(handler).
 				Doc(doc).
 				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
@@ -825,9 +815,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 				handler = restfulCreateResource(creater, reqScope, admit)
 			}
 			handler = metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, handler)
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 			article := GetArticleForNoun(kind, " ")
 			doc := "create" + article + kind
 			if isSubresource {
@@ -861,9 +849,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 				deleteReturnType = producedObject
 			}
 			handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, restfulDeleteResource(gracefulDeleter, isGracefulDeleter, reqScope, admit))
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 			route := ws.DELETE(action.Path).To(handler).
 				Doc(doc).
 				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
@@ -887,9 +873,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 				doc = "delete collection of " + subresource + " of a " + kind
 			}
 			handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, restfulDeleteCollection(collectionDeleter, isCollectionDeleter, reqScope, admit))
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 			route := ws.DELETE(action.Path).To(handler).
 				Doc(doc).
 				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
@@ -917,9 +901,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 			}
 			doc += ". deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter."
 			handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, restfulListResource(lister, watcher, reqScope, true, a.minRequestTimeout))
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 			route := ws.GET(action.Path).To(handler).
 				Doc(doc).
 				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
@@ -940,9 +922,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 			}
 			doc += ". deprecated: use the 'watch' parameter with a list operation instead."
 			handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, restfulListResource(lister, watcher, reqScope, true, a.minRequestTimeout))
-			if enableWarningHeaders {
-				handler = utilwarning.AddWarningsHandler(handler, warnings)
-			}
+			handler = utilwarning.AddWarningsHandler(handler, warnings)
 			route := ws.GET(action.Path).To(handler).
 				Doc(doc).
 				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
@@ -966,9 +946,7 @@ func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storag
 					doc = "connect " + method + " requests to " + subresource + " of " + kind
 				}
 				handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, deprecated, removedRelease, restfulConnectResource(connecter, reqScope, admit, path, isSubresource))
-				if enableWarningHeaders {
-					handler = utilwarning.AddWarningsHandler(handler, warnings)
-				}
+				handler = utilwarning.AddWarningsHandler(handler, warnings)
 				route := ws.Method(method).Path(action.Path).
 					To(handler).
 					Doc(doc).

staging/src/k8s.io/apiserver/pkg/endpoints/metrics/metrics.go

@@ -65,7 +65,7 @@ var (
 		&compbasemetrics.GaugeOpts{
 			Name:           "apiserver_requested_deprecated_apis",
 			Help:           "Gauge of deprecated APIs that have been requested, broken out by API group, version, resource, subresource, and removed_release.",
-			StabilityLevel: compbasemetrics.ALPHA,
+			StabilityLevel: compbasemetrics.STABLE,
 		},
 		[]string{"group", "version", "resource", "subresource", "removed_release"},
 	)

staging/src/k8s.io/apiserver/pkg/features/kube_features.go

@@ -146,6 +146,7 @@ const (
 
 	// owner: @liggitt
 	// beta: v1.19
+	// GA: v1.22
 	//
 	// Allows sending warning headers in API responses.
 	WarningHeaders featuregate.Feature = "WarningHeaders"
@@ -186,7 +187,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	APIPriorityAndFairness:   {Default: true, PreRelease: featuregate.Beta},
 	RemoveSelfLink:           {Default: true, PreRelease: featuregate.Beta},
 	SelectorIndex:            {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
-	WarningHeaders:           {Default: true, PreRelease: featuregate.Beta},
+	WarningHeaders:           {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
 	EfficientWatchResumption: {Default: true, PreRelease: featuregate.Beta},
 	APIServerIdentity:        {Default: false, PreRelease: featuregate.Alpha},
 }

test/instrumentation/testdata/stable-metrics-list.yaml

@@ -65,6 +65,17 @@
   - subresource
   - verb
   - version
+- name: apiserver_requested_deprecated_apis
+  help: Gauge of deprecated APIs that have been requested, broken out by API group,
+    version, resource, subresource, and removed_release.
+  type: Gauge
+  stabilityLevel: STABLE
+  labels:
+  - group
+  - removed_release
+  - resource
+  - subresource
+  - version
 - name: apiserver_storage_objects
   help: Number of stored objects at the time of last check split by kind.
   type: Gauge