Merge pull request #131068 from soltysh/sample_controller_scheme

Switch sample-controller to use NewClientset supporting applyconfiguration rather than deprecated NewSimpleClientset

api/api-rules/sample_controller_violation_exceptions.list

@@ -0,0 +1,16 @@
+API rule violation: names_match,k8s.io/apimachinery/pkg/api/resource,Quantity,Format
+API rule violation: names_match,k8s.io/apimachinery/pkg/api/resource,Quantity,d
+API rule violation: names_match,k8s.io/apimachinery/pkg/api/resource,Quantity,i
+API rule violation: names_match,k8s.io/apimachinery/pkg/api/resource,Quantity,s
+API rule violation: names_match,k8s.io/apimachinery/pkg/api/resource,int64Amount,scale
+API rule violation: names_match,k8s.io/apimachinery/pkg/api/resource,int64Amount,value
+API rule violation: names_match,k8s.io/apimachinery/pkg/apis/meta/v1,APIResourceList,APIResources
+API rule violation: names_match,k8s.io/apimachinery/pkg/apis/meta/v1,Duration,Duration
+API rule violation: names_match,k8s.io/apimachinery/pkg/apis/meta/v1,InternalEvent,Object
+API rule violation: names_match,k8s.io/apimachinery/pkg/apis/meta/v1,InternalEvent,Type
+API rule violation: names_match,k8s.io/apimachinery/pkg/apis/meta/v1,MicroTime,Time
+API rule violation: names_match,k8s.io/apimachinery/pkg/apis/meta/v1,StatusCause,Type
+API rule violation: names_match,k8s.io/apimachinery/pkg/apis/meta/v1,Time,Time
+API rule violation: names_match,k8s.io/apimachinery/pkg/runtime,Unknown,ContentEncoding
+API rule violation: names_match,k8s.io/apimachinery/pkg/runtime,Unknown,ContentType
+API rule violation: streaming_list_type_json_tags,k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1,FooList,ListMeta

hack/update-codegen.sh

@@ -113,7 +113,7 @@ fi
 # Some of the later codegens depend on the results of this, so it needs to come
 # first in the case of regenerating everything.
 function codegen::protobuf() {
-    if [[ -n "${LINT:-}" ]]; then                                                             
+    if [[ -n "${LINT:-}" ]]; then
         if [[ "${KUBE_VERBOSE}" -gt 2 ]]; then
             kube::log::status "No linter for protobuf codegen"
         fi
@@ -657,7 +657,8 @@ function codegen::openapi() {
     kube::util::read-array tag_files < <(
         k8s_tag_files_except \
             staging/src/k8s.io/code-generator \
-            staging/src/k8s.io/sample-apiserver
+            staging/src/k8s.io/sample-apiserver \
+            staging/src/k8s.io/sample-controller
         )
 
     local tag_dirs=()

staging/src/k8s.io/sample-controller/controller_test.go

@@ -85,8 +85,8 @@ func newFoo(name string, replicas *int32) *samplecontroller.Foo {
 }
 
 func (f *fixture) newController(ctx context.Context) (*Controller, informers.SharedInformerFactory, kubeinformers.SharedInformerFactory) {
-	f.client = fake.NewSimpleClientset(f.objects...)
+	f.client = fake.NewClientset(f.objects...)
-	f.kubeclient = k8sfake.NewSimpleClientset(f.kubeobjects...)
+	f.kubeclient = k8sfake.NewClientset(f.kubeobjects...)
 
 	i := informers.NewSharedInformerFactory(f.client, noResyncPeriodFunc())
 	k8sI := kubeinformers.NewSharedInformerFactory(f.kubeclient, noResyncPeriodFunc())

staging/src/k8s.io/sample-controller/go.mod

@@ -13,7 +13,9 @@ require (
 	k8s.io/client-go v0.0.0
 	k8s.io/code-generator v0.0.0
 	k8s.io/klog/v2 v2.130.1
+	k8s.io/kube-openapi v0.0.0-20260127142750-a19766b6e2d4
 	k8s.io/utils v0.0.0-20251219084037-98d557b7f1e7
+	sigs.k8s.io/structured-merge-diff/v6 v6.3.1
 )
 
 require (
@@ -50,10 +52,8 @@ require (
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	k8s.io/gengo/v2 v2.0.0-20250922181213-ec3ebc5fd46b // indirect
-	k8s.io/kube-openapi v0.0.0-20260127142750-a19766b6e2d4 // indirect
 	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
-	sigs.k8s.io/structured-merge-diff/v6 v6.3.1 // indirect
 	sigs.k8s.io/yaml v1.6.0 // indirect
 )
 

staging/src/k8s.io/sample-controller/hack/custom-boilerplate.go.txt

@@ -1,16 +0,0 @@
-/*
-Copyright YEAR The Kubernetes sample-controller Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-

staging/src/k8s.io/sample-controller/hack/update-codegen.sh

@@ -29,8 +29,26 @@ kube::codegen::gen_helpers \
     --boilerplate "${SCRIPT_ROOT}/hack/boilerplate.go.txt" \
     "${SCRIPT_ROOT}/pkg/apis"
 
+if [[ -n "${API_KNOWN_VIOLATIONS_DIR:-}" ]]; then
+    report_filename="${API_KNOWN_VIOLATIONS_DIR}/sample_controller_violation_exceptions.list"
+    if [[ "${UPDATE_API_KNOWN_VIOLATIONS:-}" == "true" ]]; then
+        update_report="--update-report"
+    fi
+fi
+
+kube::codegen::gen_openapi \
+    --output-dir "${SCRIPT_ROOT}/pkg/generated/openapi" \
+    --output-pkg "k8s.io/${THIS_PKG}/pkg/generated/openapi" \
+    --report-filename "${report_filename:-"/dev/null"}" \
+    --output-model-name-file "zz_generated.model_name.go" \
+    ${update_report:+"${update_report}"} \
+    --boilerplate "${SCRIPT_ROOT}/hack/boilerplate.go.txt" \
+    "${SCRIPT_ROOT}/pkg/apis"
+
 kube::codegen::gen_client \
     --with-watch \
+    --with-applyconfig \
+    --applyconfig-openapi-schema <(go run k8s.io/sample-controller/pkg/generated/openapi/cmd/models-schema) \
     --output-dir "${SCRIPT_ROOT}/pkg/generated" \
     --output-pkg "${THIS_PKG}/pkg/generated" \
     --boilerplate "${SCRIPT_ROOT}/hack/boilerplate.go.txt" \

staging/src/k8s.io/sample-controller/hack/verify-codegen.sh

@@ -29,6 +29,19 @@ trap "cleanup" EXIT SIGINT
 
 cleanup
 
+# Ensure model-schema generator matches the version from
+# k8s.io/kubernetes/pkg/generated/openapi/cmd/models-schema/main.go
+echo "Ensuring models-schema is up-to-date"
+K8S_MODELS_SCHEMA="${SCRIPT_ROOT}/../../../../pkg/generated/openapi/cmd/models-schema/main.go"
+SAMPLE_CONTROLLER_MODELS_SCHEMA="${SCRIPT_ROOT}/pkg/generated/openapi/cmd/models-schema/main.go"
+# these two files will only differ in the imported lines for generated openapi
+if ! diff -I "k8s.io/kubernetes/pkg/generated/openapi" \
+  -I "k8s.io/sample-controller/pkg/generated/openapi" \
+  "${K8S_MODELS_SCHEMA}" "${SAMPLE_CONTROLLER_MODELS_SCHEMA}"; then
+  echo "${SAMPLE_CONTROLLER_MODELS_SCHEMA} is out of date. Compare changes with ${K8S_MODELS_SCHEMA}"
+  exit 1
+fi
+
 mkdir -p "${TMP_DIFFROOT}"
 cp -a "${DIFFROOT}"/* "${TMP_DIFFROOT}"
 

staging/src/k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1/doc.go

@@ -15,6 +15,7 @@ limitations under the License.
 */
 
 // +k8s:deepcopy-gen=package
+// +k8s:openapi-gen=true
 // +groupName=samplecontroller.k8s.io
 
 // Package v1alpha1 is the v1alpha1 version of the API.

staging/src/k8s.io/sample-controller/pkg/generated/applyconfiguration/internal/internal.go

@@ -0,0 +1,72 @@
+/*
+Copyright The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by applyconfiguration-gen. DO NOT EDIT.
+
+package internal
+
+import (
+	fmt "fmt"
+	sync "sync"
+
+	typed "sigs.k8s.io/structured-merge-diff/v6/typed"
+)
+
+func Parser() *typed.Parser {
+	parserOnce.Do(func() {
+		var err error
+		parser, err = typed.NewParser(schemaYAML)
+		if err != nil {
+			panic(fmt.Sprintf("Failed to parse schema: %v", err))
+		}
+	})
+	return parser
+}
+
+var parserOnce sync.Once
+var parser *typed.Parser
+var schemaYAML = typed.YAMLObject(`types:
+- name: io.k8s.sample-controller.pkg.apis.samplecontroller.v1alpha1.Foo
+  scalar: untyped
+  list:
+    elementType:
+      namedType: __untyped_atomic_
+    elementRelationship: atomic
+  map:
+    elementType:
+      namedType: __untyped_deduced_
+    elementRelationship: separable
+- name: __untyped_atomic_
+  scalar: untyped
+  list:
+    elementType:
+      namedType: __untyped_atomic_
+    elementRelationship: atomic
+  map:
+    elementType:
+      namedType: __untyped_atomic_
+    elementRelationship: atomic
+- name: __untyped_deduced_
+  scalar: untyped
+  list:
+    elementType:
+      namedType: __untyped_atomic_
+    elementRelationship: atomic
+  map:
+    elementType:
+      namedType: __untyped_deduced_
+    elementRelationship: separable
+`)

staging/src/k8s.io/sample-controller/pkg/generated/applyconfiguration/samplecontroller/v1alpha1/foo.go

@@ -0,0 +1,289 @@
+/*
+Copyright The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by applyconfiguration-gen. DO NOT EDIT.
+
+package v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	types "k8s.io/apimachinery/pkg/types"
+	managedfields "k8s.io/apimachinery/pkg/util/managedfields"
+	v1 "k8s.io/client-go/applyconfigurations/meta/v1"
+	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
+	internal "k8s.io/sample-controller/pkg/generated/applyconfiguration/internal"
+)
+
+// FooApplyConfiguration represents a declarative configuration of the Foo type for use
+// with apply.
+//
+// Foo is a specification for a Foo resource
+type FooApplyConfiguration struct {
+	v1.TypeMetaApplyConfiguration    `json:",inline"`
+	*v1.ObjectMetaApplyConfiguration `json:"metadata,omitempty"`
+	Spec                             *FooSpecApplyConfiguration   `json:"spec,omitempty"`
+	Status                           *FooStatusApplyConfiguration `json:"status,omitempty"`
+}
+
+// Foo constructs a declarative configuration of the Foo type for use with
+// apply.
+func Foo(name, namespace string) *FooApplyConfiguration {
+	b := &FooApplyConfiguration{}
+	b.WithName(name)
+	b.WithNamespace(namespace)
+	b.WithKind("Foo")
+	b.WithAPIVersion("samplecontroller.k8s.io/v1alpha1")
+	return b
+}
+
+// ExtractFooFrom extracts the applied configuration owned by fieldManager from
+// foo for the specified subresource. Pass an empty string for subresource to extract
+// the main resource. Common subresources include "status", "scale", etc.
+// foo must be a unmodified Foo API object that was retrieved from the Kubernetes API.
+// ExtractFooFrom provides a way to perform a extract/modify-in-place/apply workflow.
+// Note that an extracted apply configuration will contain fewer fields than what the fieldManager previously
+// applied if another fieldManager has updated or force applied any of the previously applied fields.
+func ExtractFooFrom(foo *samplecontrollerv1alpha1.Foo, fieldManager string, subresource string) (*FooApplyConfiguration, error) {
+	b := &FooApplyConfiguration{}
+	err := managedfields.ExtractInto(foo, internal.Parser().Type("io.k8s.sample-controller.pkg.apis.samplecontroller.v1alpha1.Foo"), fieldManager, b, subresource)
+	if err != nil {
+		return nil, err
+	}
+	b.WithName(foo.Name)
+	b.WithNamespace(foo.Namespace)
+
+	b.WithKind("Foo")
+	b.WithAPIVersion("samplecontroller.k8s.io/v1alpha1")
+	return b, nil
+}
+
+// ExtractFoo extracts the applied configuration owned by fieldManager from
+// foo. If no managedFields are found in foo for fieldManager, a
+// FooApplyConfiguration is returned with only the Name, Namespace (if applicable),
+// APIVersion and Kind populated. It is possible that no managed fields were found for because other
+// field managers have taken ownership of all the fields previously owned by fieldManager, or because
+// the fieldManager never owned fields any fields.
+// foo must be a unmodified Foo API object that was retrieved from the Kubernetes API.
+// ExtractFoo provides a way to perform a extract/modify-in-place/apply workflow.
+// Note that an extracted apply configuration will contain fewer fields than what the fieldManager previously
+// applied if another fieldManager has updated or force applied any of the previously applied fields.
+func ExtractFoo(foo *samplecontrollerv1alpha1.Foo, fieldManager string) (*FooApplyConfiguration, error) {
+	return ExtractFooFrom(foo, fieldManager, "")
+}
+
+// ExtractFooStatus extracts the applied configuration owned by fieldManager from
+// foo for the status subresource.
+func ExtractFooStatus(foo *samplecontrollerv1alpha1.Foo, fieldManager string) (*FooApplyConfiguration, error) {
+	return ExtractFooFrom(foo, fieldManager, "status")
+}
+
+func (b FooApplyConfiguration) IsApplyConfiguration() {}
+
+// WithKind sets the Kind field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the Kind field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithKind(value string) *FooApplyConfiguration {
+	b.TypeMetaApplyConfiguration.Kind = &value
+	return b
+}
+
+// WithAPIVersion sets the APIVersion field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the APIVersion field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithAPIVersion(value string) *FooApplyConfiguration {
+	b.TypeMetaApplyConfiguration.APIVersion = &value
+	return b
+}
+
+// WithName sets the Name field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the Name field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithName(value string) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.Name = &value
+	return b
+}
+
+// WithGenerateName sets the GenerateName field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the GenerateName field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithGenerateName(value string) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.GenerateName = &value
+	return b
+}
+
+// WithNamespace sets the Namespace field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the Namespace field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithNamespace(value string) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.Namespace = &value
+	return b
+}
+
+// WithUID sets the UID field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the UID field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithUID(value types.UID) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.UID = &value
+	return b
+}
+
+// WithResourceVersion sets the ResourceVersion field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the ResourceVersion field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithResourceVersion(value string) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.ResourceVersion = &value
+	return b
+}
+
+// WithGeneration sets the Generation field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the Generation field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithGeneration(value int64) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.Generation = &value
+	return b
+}
+
+// WithCreationTimestamp sets the CreationTimestamp field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the CreationTimestamp field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithCreationTimestamp(value metav1.Time) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.CreationTimestamp = &value
+	return b
+}
+
+// WithDeletionTimestamp sets the DeletionTimestamp field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the DeletionTimestamp field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithDeletionTimestamp(value metav1.Time) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.DeletionTimestamp = &value
+	return b
+}
+
+// WithDeletionGracePeriodSeconds sets the DeletionGracePeriodSeconds field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the DeletionGracePeriodSeconds field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithDeletionGracePeriodSeconds(value int64) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	b.ObjectMetaApplyConfiguration.DeletionGracePeriodSeconds = &value
+	return b
+}
+
+// WithLabels puts the entries into the Labels field in the declarative configuration
+// and returns the receiver, so that objects can be build by chaining "With" function invocations.
+// If called multiple times, the entries provided by each call will be put on the Labels field,
+// overwriting an existing map entries in Labels field with the same key.
+func (b *FooApplyConfiguration) WithLabels(entries map[string]string) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	if b.ObjectMetaApplyConfiguration.Labels == nil && len(entries) > 0 {
+		b.ObjectMetaApplyConfiguration.Labels = make(map[string]string, len(entries))
+	}
+	for k, v := range entries {
+		b.ObjectMetaApplyConfiguration.Labels[k] = v
+	}
+	return b
+}
+
+// WithAnnotations puts the entries into the Annotations field in the declarative configuration
+// and returns the receiver, so that objects can be build by chaining "With" function invocations.
+// If called multiple times, the entries provided by each call will be put on the Annotations field,
+// overwriting an existing map entries in Annotations field with the same key.
+func (b *FooApplyConfiguration) WithAnnotations(entries map[string]string) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	if b.ObjectMetaApplyConfiguration.Annotations == nil && len(entries) > 0 {
+		b.ObjectMetaApplyConfiguration.Annotations = make(map[string]string, len(entries))
+	}
+	for k, v := range entries {
+		b.ObjectMetaApplyConfiguration.Annotations[k] = v
+	}
+	return b
+}
+
+// WithOwnerReferences adds the given value to the OwnerReferences field in the declarative configuration
+// and returns the receiver, so that objects can be build by chaining "With" function invocations.
+// If called multiple times, values provided by each call will be appended to the OwnerReferences field.
+func (b *FooApplyConfiguration) WithOwnerReferences(values ...*v1.OwnerReferenceApplyConfiguration) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	for i := range values {
+		if values[i] == nil {
+			panic("nil value passed to WithOwnerReferences")
+		}
+		b.ObjectMetaApplyConfiguration.OwnerReferences = append(b.ObjectMetaApplyConfiguration.OwnerReferences, *values[i])
+	}
+	return b
+}
+
+// WithFinalizers adds the given value to the Finalizers field in the declarative configuration
+// and returns the receiver, so that objects can be build by chaining "With" function invocations.
+// If called multiple times, values provided by each call will be appended to the Finalizers field.
+func (b *FooApplyConfiguration) WithFinalizers(values ...string) *FooApplyConfiguration {
+	b.ensureObjectMetaApplyConfigurationExists()
+	for i := range values {
+		b.ObjectMetaApplyConfiguration.Finalizers = append(b.ObjectMetaApplyConfiguration.Finalizers, values[i])
+	}
+	return b
+}
+
+func (b *FooApplyConfiguration) ensureObjectMetaApplyConfigurationExists() {
+	if b.ObjectMetaApplyConfiguration == nil {
+		b.ObjectMetaApplyConfiguration = &v1.ObjectMetaApplyConfiguration{}
+	}
+}
+
+// WithSpec sets the Spec field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the Spec field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithSpec(value *FooSpecApplyConfiguration) *FooApplyConfiguration {
+	b.Spec = value
+	return b
+}
+
+// WithStatus sets the Status field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the Status field is set to the value of the last call.
+func (b *FooApplyConfiguration) WithStatus(value *FooStatusApplyConfiguration) *FooApplyConfiguration {
+	b.Status = value
+	return b
+}
+
+// GetKind retrieves the value of the Kind field in the declarative configuration.
+func (b *FooApplyConfiguration) GetKind() *string {
+	return b.TypeMetaApplyConfiguration.Kind
+}
+
+// GetAPIVersion retrieves the value of the APIVersion field in the declarative configuration.
+func (b *FooApplyConfiguration) GetAPIVersion() *string {
+	return b.TypeMetaApplyConfiguration.APIVersion
+}
+
+// GetName retrieves the value of the Name field in the declarative configuration.
+func (b *FooApplyConfiguration) GetName() *string {
+	b.ensureObjectMetaApplyConfigurationExists()
+	return b.ObjectMetaApplyConfiguration.Name
+}
+
+// GetNamespace retrieves the value of the Namespace field in the declarative configuration.
+func (b *FooApplyConfiguration) GetNamespace() *string {
+	b.ensureObjectMetaApplyConfigurationExists()
+	return b.ObjectMetaApplyConfiguration.Namespace
+}

staging/src/k8s.io/sample-controller/pkg/generated/applyconfiguration/samplecontroller/v1alpha1/foospec.go

@@ -0,0 +1,50 @@
+/*
+Copyright The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by applyconfiguration-gen. DO NOT EDIT.
+
+package v1alpha1
+
+// FooSpecApplyConfiguration represents a declarative configuration of the FooSpec type for use
+// with apply.
+//
+// FooSpec is the spec for a Foo resource
+type FooSpecApplyConfiguration struct {
+	DeploymentName *string `json:"deploymentName,omitempty"`
+	Replicas       *int32  `json:"replicas,omitempty"`
+}
+
+// FooSpecApplyConfiguration constructs a declarative configuration of the FooSpec type for use with
+// apply.
+func FooSpec() *FooSpecApplyConfiguration {
+	return &FooSpecApplyConfiguration{}
+}
+
+// WithDeploymentName sets the DeploymentName field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the DeploymentName field is set to the value of the last call.
+func (b *FooSpecApplyConfiguration) WithDeploymentName(value string) *FooSpecApplyConfiguration {
+	b.DeploymentName = &value
+	return b
+}
+
+// WithReplicas sets the Replicas field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the Replicas field is set to the value of the last call.
+func (b *FooSpecApplyConfiguration) WithReplicas(value int32) *FooSpecApplyConfiguration {
+	b.Replicas = &value
+	return b
+}

staging/src/k8s.io/sample-controller/pkg/generated/applyconfiguration/samplecontroller/v1alpha1/foostatus.go

@@ -0,0 +1,41 @@
+/*
+Copyright The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by applyconfiguration-gen. DO NOT EDIT.
+
+package v1alpha1
+
+// FooStatusApplyConfiguration represents a declarative configuration of the FooStatus type for use
+// with apply.
+//
+// FooStatus is the status for a Foo resource
+type FooStatusApplyConfiguration struct {
+	AvailableReplicas *int32 `json:"availableReplicas,omitempty"`
+}
+
+// FooStatusApplyConfiguration constructs a declarative configuration of the FooStatus type for use with
+// apply.
+func FooStatus() *FooStatusApplyConfiguration {
+	return &FooStatusApplyConfiguration{}
+}
+
+// WithAvailableReplicas sets the AvailableReplicas field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the AvailableReplicas field is set to the value of the last call.
+func (b *FooStatusApplyConfiguration) WithAvailableReplicas(value int32) *FooStatusApplyConfiguration {
+	b.AvailableReplicas = &value
+	return b
+}

staging/src/k8s.io/sample-controller/pkg/generated/applyconfiguration/utils.go

@@ -0,0 +1,48 @@
+/*
+Copyright The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by applyconfiguration-gen. DO NOT EDIT.
+
+package applyconfiguration
+
+import (
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	schema "k8s.io/apimachinery/pkg/runtime/schema"
+	managedfields "k8s.io/apimachinery/pkg/util/managedfields"
+	v1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
+	internal "k8s.io/sample-controller/pkg/generated/applyconfiguration/internal"
+	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/applyconfiguration/samplecontroller/v1alpha1"
+)
+
+// ForKind returns an apply configuration type for the given GroupVersionKind, or nil if no
+// apply configuration type exists for the given GroupVersionKind.
+func ForKind(kind schema.GroupVersionKind) interface{} {
+	switch kind {
+	// Group=samplecontroller.k8s.io, Version=v1alpha1
+	case v1alpha1.SchemeGroupVersion.WithKind("Foo"):
+		return &samplecontrollerv1alpha1.FooApplyConfiguration{}
+	case v1alpha1.SchemeGroupVersion.WithKind("FooSpec"):
+		return &samplecontrollerv1alpha1.FooSpecApplyConfiguration{}
+	case v1alpha1.SchemeGroupVersion.WithKind("FooStatus"):
+		return &samplecontrollerv1alpha1.FooStatusApplyConfiguration{}
+
+	}
+	return nil
+}
+
+func NewTypeConverter(scheme *runtime.Scheme) managedfields.TypeConverter {
+	return managedfields.NewSchemeTypeConverter(scheme, internal.Parser())
+}

staging/src/k8s.io/sample-controller/pkg/generated/clientset/versioned/fake/clientset_generated.go

@@ -25,6 +25,7 @@ import (
 	"k8s.io/client-go/discovery"
 	fakediscovery "k8s.io/client-go/discovery/fake"
 	"k8s.io/client-go/testing"
+	applyconfiguration "k8s.io/sample-controller/pkg/generated/applyconfiguration"
 	clientset "k8s.io/sample-controller/pkg/generated/clientset/versioned"
 	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1"
 	fakesamplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/fake"
@@ -94,6 +95,42 @@ func (c *Clientset) IsWatchListSemanticsUnSupported() bool {
 	return true
 }
 
+// NewClientset returns a clientset that will respond with the provided objects.
+// It's backed by a very simple object tracker that processes creates, updates and deletions as-is,
+// without applying any validations and/or defaults. It shouldn't be considered a replacement
+// for a real clientset and is mostly useful in simple unit tests.
+func NewClientset(objects ...runtime.Object) *Clientset {
+	o := testing.NewFieldManagedObjectTracker(
+		scheme,
+		codecs.UniversalDecoder(),
+		applyconfiguration.NewTypeConverter(scheme),
+	)
+	for _, obj := range objects {
+		if err := o.Add(obj); err != nil {
+			panic(err)
+		}
+	}
+
+	cs := &Clientset{tracker: o}
+	cs.discovery = &fakediscovery.FakeDiscovery{Fake: &cs.Fake}
+	cs.AddReactor("*", "*", testing.ObjectReaction(o))
+	cs.AddWatchReactor("*", func(action testing.Action) (handled bool, ret watch.Interface, err error) {
+		var opts metav1.ListOptions
+		if watchAction, ok := action.(testing.WatchActionImpl); ok {
+			opts = watchAction.ListOptions
+		}
+		gvr := action.GetResource()
+		ns := action.GetNamespace()
+		watch, err := o.Watch(gvr, ns, opts)
+		if err != nil {
+			return false, nil, err
+		}
+		return true, watch, nil
+	})
+
+	return cs
+}
+
 var (
 	_ clientset.Interface = &Clientset{}
 	_ testing.FakeClient  = &Clientset{}

staging/src/k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/fake/fake_foo.go

@@ -21,18 +21,19 @@ package fake
 import (
 	gentype "k8s.io/client-go/gentype"
 	v1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
-	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1"
+	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/applyconfiguration/samplecontroller/v1alpha1"
+	typedsamplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1"
 )
 
 // fakeFoos implements FooInterface
 type fakeFoos struct {
-	*gentype.FakeClientWithList[*v1alpha1.Foo, *v1alpha1.FooList]
+	*gentype.FakeClientWithListAndApply[*v1alpha1.Foo, *v1alpha1.FooList, *samplecontrollerv1alpha1.FooApplyConfiguration]
 	Fake *FakeSamplecontrollerV1alpha1
 }
 
-func newFakeFoos(fake *FakeSamplecontrollerV1alpha1, namespace string) samplecontrollerv1alpha1.FooInterface {
+func newFakeFoos(fake *FakeSamplecontrollerV1alpha1, namespace string) typedsamplecontrollerv1alpha1.FooInterface {
 	return &fakeFoos{
-		gentype.NewFakeClientWithList[*v1alpha1.Foo, *v1alpha1.FooList](
+		gentype.NewFakeClientWithListAndApply[*v1alpha1.Foo, *v1alpha1.FooList, *samplecontrollerv1alpha1.FooApplyConfiguration](
 			fake.Fake,
 			namespace,
 			v1alpha1.SchemeGroupVersion.WithResource("foos"),

staging/src/k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/foo.go

@@ -26,6 +26,7 @@ import (
 	watch "k8s.io/apimachinery/pkg/watch"
 	gentype "k8s.io/client-go/gentype"
 	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
+	applyconfigurationsamplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/applyconfiguration/samplecontroller/v1alpha1"
 	scheme "k8s.io/sample-controller/pkg/generated/clientset/versioned/scheme"
 )
 
@@ -47,18 +48,21 @@ type FooInterface interface {
 	List(ctx context.Context, opts v1.ListOptions) (*samplecontrollerv1alpha1.FooList, error)
 	Watch(ctx context.Context, opts v1.ListOptions) (watch.Interface, error)
 	Patch(ctx context.Context, name string, pt types.PatchType, data []byte, opts v1.PatchOptions, subresources ...string) (result *samplecontrollerv1alpha1.Foo, err error)
+	Apply(ctx context.Context, foo *applyconfigurationsamplecontrollerv1alpha1.FooApplyConfiguration, opts v1.ApplyOptions) (result *samplecontrollerv1alpha1.Foo, err error)
+	// Add a +genclient:noStatus comment above the type to avoid generating ApplyStatus().
+	ApplyStatus(ctx context.Context, foo *applyconfigurationsamplecontrollerv1alpha1.FooApplyConfiguration, opts v1.ApplyOptions) (result *samplecontrollerv1alpha1.Foo, err error)
 	FooExpansion
 }
 
 // foos implements FooInterface
 type foos struct {
-	*gentype.ClientWithList[*samplecontrollerv1alpha1.Foo, *samplecontrollerv1alpha1.FooList]
+	*gentype.ClientWithListAndApply[*samplecontrollerv1alpha1.Foo, *samplecontrollerv1alpha1.FooList, *applyconfigurationsamplecontrollerv1alpha1.FooApplyConfiguration]
 }
 
 // newFoos returns a Foos
 func newFoos(c *SamplecontrollerV1alpha1Client, namespace string) *foos {
 	return &foos{
-		gentype.NewClientWithList[*samplecontrollerv1alpha1.Foo, *samplecontrollerv1alpha1.FooList](
+		gentype.NewClientWithListAndApply[*samplecontrollerv1alpha1.Foo, *samplecontrollerv1alpha1.FooList, *applyconfigurationsamplecontrollerv1alpha1.FooApplyConfiguration](
 			"foos",
 			c.RESTClient(),
 			scheme.ParameterCodec,

staging/src/k8s.io/sample-controller/pkg/generated/openapi/cmd/models-schema/main.go

@@ -0,0 +1,76 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"k8s.io/kube-openapi/pkg/common"
+	"k8s.io/kube-openapi/pkg/validation/spec"
+	"k8s.io/sample-controller/pkg/generated/openapi"
+)
+
+// Outputs openAPI schema JSON containing the schema definitions in zz_generated.openapi.go.
+func main() {
+	err := output()
+	if err != nil {
+		os.Stderr.WriteString(fmt.Sprintf("Failed: %v", err)) // nolint:errcheck
+		os.Exit(1)
+	}
+}
+
+func output() error {
+	refFunc := func(name string) spec.Ref {
+		return spec.MustCreateRef(fmt.Sprintf("#/definitions/%s", name))
+	}
+	defs := openapi.GetOpenAPIDefinitions(refFunc)
+	schemaDefs := make(map[string]spec.Schema, len(defs))
+	for k, v := range defs {
+		// Replace top-level schema with v2 if a v2 schema is embedded
+		// so that the output of this program is always in OpenAPI v2.
+		// This is done by looking up an extension that marks the embedded v2
+		// schema, and, if the v2 schema is found, make it the resulting schema for
+		// the type.
+		if schema, ok := v.Schema.Extensions[common.ExtensionV2Schema]; ok {
+			if v2Schema, isOpenAPISchema := schema.(spec.Schema); isOpenAPISchema {
+				schemaDefs[k] = v2Schema
+				continue
+			}
+		}
+
+		schemaDefs[k] = v.Schema
+	}
+	data, err := json.Marshal(&spec.Swagger{
+		SwaggerProps: spec.SwaggerProps{
+			Definitions: schemaDefs,
+			Info: &spec.Info{
+				InfoProps: spec.InfoProps{
+					Title:   "Kubernetes",
+					Version: "unversioned",
+				},
+			},
+			Swagger: "2.0",
+		},
+	})
+	if err != nil {
+		return fmt.Errorf("error serializing api definitions: %w", err)
+	}
+	os.Stdout.Write(data) // nolint:errcheck
+	return nil
+}