De-share the Handler struct in core API (#105979)

* De-share the Handler struct in core API

An upcoming PR adds a handler that only applies on one of these paths.
Having fields that don't work seems bad.

This never should have been shared.  Lifecycle hooks are like a "write"
while probes are more like a "read". HTTPGet and TCPSocket don't really
make sense as lifecycle hooks (but I can't take that back). When we add
gRPC, it is EXPLICITLY a health check (defined by gRPC) not an arbitrary
RPC - so a probe makes sense but a hook does not.

In the future I can also see adding lifecycle hooks that don't make
sense as probes.  E.g. 'sleep' is a common lifecycle request. The only
option is `exec`, which requires having a sleep binary in your image.

* Run update scripts

staging/src/k8s.io/api/core/v1/generated.proto

@@ -1746,25 +1746,6 @@ message HTTPHeader {
   optional string value = 2;
 }
 
-// Handler defines a specific action that should be taken
-// TODO: pass structured data to these actions, and document that data here.
-message Handler {
-  // One and only one of the following should be specified.
-  // Exec specifies the action to take.
-  // +optional
-  optional ExecAction exec = 1;
-
-  // HTTPGet specifies the http request to perform.
-  // +optional
-  optional HTTPGetAction httpGet = 2;
-
-  // TCPSocket specifies an action involving a TCP port.
-  // TCP hooks not yet supported
-  // TODO: implement a realistic TCP lifecycle hook
-  // +optional
-  optional TCPSocketAction tcpSocket = 3;
-}
-
 // HostAlias holds the mapping between IP and hostnames that will be injected as an entry in the
 // pod's hosts file.
 message HostAlias {
@@ -1932,7 +1913,7 @@ message Lifecycle {
   // Other management of the container blocks until the hook completes.
   // More info: https://kubernetes.io/docs/concepts/containers/container-lifecycle-hooks/#container-hooks
   // +optional
-  optional Handler postStart = 1;
+  optional LifecycleHandler postStart = 1;
 
   // PreStop is called immediately before a container is terminated due to an
   // API request or management event such as liveness/startup probe failure,
@@ -1945,7 +1926,28 @@ message Lifecycle {
   // or until the termination grace period is reached.
   // More info: https://kubernetes.io/docs/concepts/containers/container-lifecycle-hooks/#container-hooks
   // +optional
-  optional Handler preStop = 2;
+  optional LifecycleHandler preStop = 2;
+}
+
+// LifecycleHandler defines a specific action that should be taken in a lifecycle
+// hook.  This type has a strong relationship to ProbeHandler - overlapping fields
+// should be identical.
+// TODO: pass structured data to these actions, and document that data here.
+message LifecycleHandler {
+  // One and only one of the following should be specified.
+  // Exec specifies the action to take.
+  // +optional
+  optional ExecAction exec = 1;
+
+  // HTTPGet specifies the http request to perform.
+  // +optional
+  optional HTTPGetAction httpGet = 2;
+
+  // TCPSocket specifies an action involving a TCP port.
+  // TCP hooks not yet supported
+  // TODO: implement a realistic TCP lifecycle hook
+  // +optional
+  optional TCPSocketAction tcpSocket = 3;
 }
 
 // LimitRange sets resource usage limits for each kind of resource in a Namespace.
@@ -3928,7 +3930,7 @@ message PreferredSchedulingTerm {
 // alive or ready to receive traffic.
 message Probe {
   // The action taken to determine the health of a container
-  optional Handler handler = 1;
+  optional ProbeHandler handler = 1;
 
   // Number of seconds after the container has started before liveness probes are initiated.
   // More info: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle#container-probes
@@ -3970,6 +3972,27 @@ message Probe {
   optional int64 terminationGracePeriodSeconds = 7;
 }
 
+// ProbeHandler defines a specific action that should be taken in a probe.
+// This type has a strong relationship to LifecycleHandler - overlapping fields
+// should be identical.
+// TODO: pass structured data to these actions, and document that data here.
+message ProbeHandler {
+  // One and only one of the following should be specified.
+  // Exec specifies the action to take.
+  // +optional
+  optional ExecAction exec = 1;
+
+  // HTTPGet specifies the http request to perform.
+  // +optional
+  optional HTTPGetAction httpGet = 2;
+
+  // TCPSocket specifies an action involving a TCP port.
+  // TCP hooks not yet supported
+  // TODO: implement a realistic TCP lifecycle hook
+  // +optional
+  optional TCPSocketAction tcpSocket = 3;
+}
+
 // Represents a projected volume source
 message ProjectedVolumeSource {
   // list of volume projections

staging/src/k8s.io/api/core/v1/types.go

@@ -2117,7 +2117,7 @@ type ExecAction struct {
 // alive or ready to receive traffic.
 type Probe struct {
 	// The action taken to determine the health of a container
-	Handler `json:",inline" protobuf:"bytes,1,opt,name=handler"`
+	ProbeHandler `json:",inline" protobuf:"bytes,1,opt,name=handler"`
 	// Number of seconds after the container has started before liveness probes are initiated.
 	// More info: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle#container-probes
 	// +optional
@@ -2381,9 +2381,30 @@ type Container struct {
 	TTY bool `json:"tty,omitempty" protobuf:"varint,18,opt,name=tty"`
 }
 
-// Handler defines a specific action that should be taken
+// ProbeHandler defines a specific action that should be taken in a probe.
+// This type has a strong relationship to LifecycleHandler - overlapping fields
+// should be identical.
 // TODO: pass structured data to these actions, and document that data here.
-type Handler struct {
+type ProbeHandler struct {
+	// One and only one of the following should be specified.
+	// Exec specifies the action to take.
+	// +optional
+	Exec *ExecAction `json:"exec,omitempty" protobuf:"bytes,1,opt,name=exec"`
+	// HTTPGet specifies the http request to perform.
+	// +optional
+	HTTPGet *HTTPGetAction `json:"httpGet,omitempty" protobuf:"bytes,2,opt,name=httpGet"`
+	// TCPSocket specifies an action involving a TCP port.
+	// TCP hooks not yet supported
+	// TODO: implement a realistic TCP lifecycle hook
+	// +optional
+	TCPSocket *TCPSocketAction `json:"tcpSocket,omitempty" protobuf:"bytes,3,opt,name=tcpSocket"`
+}
+
+// LifecycleHandler defines a specific action that should be taken in a lifecycle
+// hook.  This type has a strong relationship to ProbeHandler - overlapping fields
+// should be identical.
+// TODO: pass structured data to these actions, and document that data here.
+type LifecycleHandler struct {
 	// One and only one of the following should be specified.
 	// Exec specifies the action to take.
 	// +optional
@@ -2407,7 +2428,7 @@ type Lifecycle struct {
 	// Other management of the container blocks until the hook completes.
 	// More info: https://kubernetes.io/docs/concepts/containers/container-lifecycle-hooks/#container-hooks
 	// +optional
-	PostStart *Handler `json:"postStart,omitempty" protobuf:"bytes,1,opt,name=postStart"`
+	PostStart *LifecycleHandler `json:"postStart,omitempty" protobuf:"bytes,1,opt,name=postStart"`
 	// PreStop is called immediately before a container is terminated due to an
 	// API request or management event such as liveness/startup probe failure,
 	// preemption, resource contention, etc. The handler is not called if the
@@ -2419,7 +2440,7 @@ type Lifecycle struct {
 	// or until the termination grace period is reached.
 	// More info: https://kubernetes.io/docs/concepts/containers/container-lifecycle-hooks/#container-hooks
 	// +optional
-	PreStop *Handler `json:"preStop,omitempty" protobuf:"bytes,2,opt,name=preStop"`
+	PreStop *LifecycleHandler `json:"preStop,omitempty" protobuf:"bytes,2,opt,name=preStop"`
 }
 
 type ConditionStatus string

staging/src/k8s.io/api/core/v1/types_swagger_doc_generated.go

@@ -806,17 +806,6 @@ func (HTTPHeader) SwaggerDoc() map[string]string {
 	return map_HTTPHeader
 }
 
-var map_Handler = map[string]string{
-	"":          "Handler defines a specific action that should be taken",
-	"exec":      "One and only one of the following should be specified. Exec specifies the action to take.",
-	"httpGet":   "HTTPGet specifies the http request to perform.",
-	"tcpSocket": "TCPSocket specifies an action involving a TCP port. TCP hooks not yet supported",
-}
-
-func (Handler) SwaggerDoc() map[string]string {
-	return map_Handler
-}
-
 var map_HostAlias = map[string]string{
 	"":          "HostAlias holds the mapping between IP and hostnames that will be injected as an entry in the pod's hosts file.",
 	"ip":        "IP address of the host file entry.",
@@ -896,6 +885,17 @@ func (Lifecycle) SwaggerDoc() map[string]string {
 	return map_Lifecycle
 }
 
+var map_LifecycleHandler = map[string]string{
+	"":          "LifecycleHandler defines a specific action that should be taken in a lifecycle hook.  This type has a strong relationship to ProbeHandler - overlapping fields should be identical.",
+	"exec":      "One and only one of the following should be specified. Exec specifies the action to take.",
+	"httpGet":   "HTTPGet specifies the http request to perform.",
+	"tcpSocket": "TCPSocket specifies an action involving a TCP port. TCP hooks not yet supported",
+}
+
+func (LifecycleHandler) SwaggerDoc() map[string]string {
+	return map_LifecycleHandler
+}
+
 var map_LimitRange = map[string]string{
 	"":         "LimitRange sets resource usage limits for each kind of resource in a Namespace.",
 	"metadata": "Standard object's metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata",
@@ -1792,6 +1792,17 @@ func (Probe) SwaggerDoc() map[string]string {
 	return map_Probe
 }
 
+var map_ProbeHandler = map[string]string{
+	"":          "ProbeHandler defines a specific action that should be taken in a probe. This type has a strong relationship to LifecycleHandler - overlapping fields should be identical.",
+	"exec":      "One and only one of the following should be specified. Exec specifies the action to take.",
+	"httpGet":   "HTTPGet specifies the http request to perform.",
+	"tcpSocket": "TCPSocket specifies an action involving a TCP port. TCP hooks not yet supported",
+}
+
+func (ProbeHandler) SwaggerDoc() map[string]string {
+	return map_ProbeHandler
+}
+
 var map_ProjectedVolumeSource = map[string]string{
 	"":            "Represents a projected volume source",
 	"sources":     "list of volume projections",

staging/src/k8s.io/api/core/v1/zz_generated.deepcopy.go

@@ -1760,37 +1760,6 @@ func (in *HTTPHeader) DeepCopy() *HTTPHeader {
 	return out
 }
 
-// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
-func (in *Handler) DeepCopyInto(out *Handler) {
-	*out = *in
-	if in.Exec != nil {
-		in, out := &in.Exec, &out.Exec
-		*out = new(ExecAction)
-		(*in).DeepCopyInto(*out)
-	}
-	if in.HTTPGet != nil {
-		in, out := &in.HTTPGet, &out.HTTPGet
-		*out = new(HTTPGetAction)
-		(*in).DeepCopyInto(*out)
-	}
-	if in.TCPSocket != nil {
-		in, out := &in.TCPSocket, &out.TCPSocket
-		*out = new(TCPSocketAction)
-		**out = **in
-	}
-	return
-}
-
-// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Handler.
-func (in *Handler) DeepCopy() *Handler {
-	if in == nil {
-		return nil
-	}
-	out := new(Handler)
-	in.DeepCopyInto(out)
-	return out
-}
-
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *HostAlias) DeepCopyInto(out *HostAlias) {
 	*out = *in
@@ -1921,12 +1890,12 @@ func (in *Lifecycle) DeepCopyInto(out *Lifecycle) {
 	*out = *in
 	if in.PostStart != nil {
 		in, out := &in.PostStart, &out.PostStart
-		*out = new(Handler)
+		*out = new(LifecycleHandler)
 		(*in).DeepCopyInto(*out)
 	}
 	if in.PreStop != nil {
 		in, out := &in.PreStop, &out.PreStop
-		*out = new(Handler)
+		*out = new(LifecycleHandler)
 		(*in).DeepCopyInto(*out)
 	}
 	return
@@ -1942,6 +1911,37 @@ func (in *Lifecycle) DeepCopy() *Lifecycle {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *LifecycleHandler) DeepCopyInto(out *LifecycleHandler) {
+	*out = *in
+	if in.Exec != nil {
+		in, out := &in.Exec, &out.Exec
+		*out = new(ExecAction)
+		(*in).DeepCopyInto(*out)
+	}
+	if in.HTTPGet != nil {
+		in, out := &in.HTTPGet, &out.HTTPGet
+		*out = new(HTTPGetAction)
+		(*in).DeepCopyInto(*out)
+	}
+	if in.TCPSocket != nil {
+		in, out := &in.TCPSocket, &out.TCPSocket
+		*out = new(TCPSocketAction)
+		**out = **in
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new LifecycleHandler.
+func (in *LifecycleHandler) DeepCopy() *LifecycleHandler {
+	if in == nil {
+		return nil
+	}
+	out := new(LifecycleHandler)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *LimitRange) DeepCopyInto(out *LimitRange) {
 	*out = *in
@@ -4183,7 +4183,7 @@ func (in *PreferredSchedulingTerm) DeepCopy() *PreferredSchedulingTerm {
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *Probe) DeepCopyInto(out *Probe) {
 	*out = *in
-	in.Handler.DeepCopyInto(&out.Handler)
+	in.ProbeHandler.DeepCopyInto(&out.ProbeHandler)
 	if in.TerminationGracePeriodSeconds != nil {
 		in, out := &in.TerminationGracePeriodSeconds, &out.TerminationGracePeriodSeconds
 		*out = new(int64)
@@ -4202,6 +4202,37 @@ func (in *Probe) DeepCopy() *Probe {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *ProbeHandler) DeepCopyInto(out *ProbeHandler) {
+	*out = *in
+	if in.Exec != nil {
+		in, out := &in.Exec, &out.Exec
+		*out = new(ExecAction)
+		(*in).DeepCopyInto(*out)
+	}
+	if in.HTTPGet != nil {
+		in, out := &in.HTTPGet, &out.HTTPGet
+		*out = new(HTTPGetAction)
+		(*in).DeepCopyInto(*out)
+	}
+	if in.TCPSocket != nil {
+		in, out := &in.TCPSocket, &out.TCPSocket
+		*out = new(TCPSocketAction)
+		**out = **in
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ProbeHandler.
+func (in *ProbeHandler) DeepCopy() *ProbeHandler {
+	if in == nil {
+		return nil
+	}
+	out := new(ProbeHandler)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *ProjectedVolumeSource) DeepCopyInto(out *ProjectedVolumeSource) {
 	*out = *in

staging/src/k8s.io/client-go/applyconfigurations/core/v1/lifecycle.go

@@ -21,8 +21,8 @@ package v1
 // LifecycleApplyConfiguration represents an declarative configuration of the Lifecycle type for use
 // with apply.
 type LifecycleApplyConfiguration struct {
-	PostStart *HandlerApplyConfiguration `json:"postStart,omitempty"`
-	PreStop   *HandlerApplyConfiguration `json:"preStop,omitempty"`
+	PostStart *LifecycleHandlerApplyConfiguration `json:"postStart,omitempty"`
+	PreStop   *LifecycleHandlerApplyConfiguration `json:"preStop,omitempty"`
 }
 
 // LifecycleApplyConfiguration constructs an declarative configuration of the Lifecycle type for use with
@@ -34,7 +34,7 @@ func Lifecycle() *LifecycleApplyConfiguration {
 // WithPostStart sets the PostStart 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 PostStart field is set to the value of the last call.
-func (b *LifecycleApplyConfiguration) WithPostStart(value *HandlerApplyConfiguration) *LifecycleApplyConfiguration {
+func (b *LifecycleApplyConfiguration) WithPostStart(value *LifecycleHandlerApplyConfiguration) *LifecycleApplyConfiguration {
 	b.PostStart = value
 	return b
 }
@@ -42,7 +42,7 @@ func (b *LifecycleApplyConfiguration) WithPostStart(value *HandlerApplyConfigura
 // WithPreStop sets the PreStop 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 PreStop field is set to the value of the last call.
-func (b *LifecycleApplyConfiguration) WithPreStop(value *HandlerApplyConfiguration) *LifecycleApplyConfiguration {
+func (b *LifecycleApplyConfiguration) WithPreStop(value *LifecycleHandlerApplyConfiguration) *LifecycleApplyConfiguration {
 	b.PreStop = value
 	return b
 }

staging/src/k8s.io/client-go/applyconfigurations/core/v1/lifecyclehandler.go

@@ -0,0 +1,57 @@
+/*
+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 v1
+
+// LifecycleHandlerApplyConfiguration represents an declarative configuration of the LifecycleHandler type for use
+// with apply.
+type LifecycleHandlerApplyConfiguration struct {
+	Exec      *ExecActionApplyConfiguration      `json:"exec,omitempty"`
+	HTTPGet   *HTTPGetActionApplyConfiguration   `json:"httpGet,omitempty"`
+	TCPSocket *TCPSocketActionApplyConfiguration `json:"tcpSocket,omitempty"`
+}
+
+// LifecycleHandlerApplyConfiguration constructs an declarative configuration of the LifecycleHandler type for use with
+// apply.
+func LifecycleHandler() *LifecycleHandlerApplyConfiguration {
+	return &LifecycleHandlerApplyConfiguration{}
+}
+
+// WithExec sets the Exec 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 Exec field is set to the value of the last call.
+func (b *LifecycleHandlerApplyConfiguration) WithExec(value *ExecActionApplyConfiguration) *LifecycleHandlerApplyConfiguration {
+	b.Exec = value
+	return b
+}
+
+// WithHTTPGet sets the HTTPGet 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 HTTPGet field is set to the value of the last call.
+func (b *LifecycleHandlerApplyConfiguration) WithHTTPGet(value *HTTPGetActionApplyConfiguration) *LifecycleHandlerApplyConfiguration {
+	b.HTTPGet = value
+	return b
+}
+
+// WithTCPSocket sets the TCPSocket 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 TCPSocket field is set to the value of the last call.
+func (b *LifecycleHandlerApplyConfiguration) WithTCPSocket(value *TCPSocketActionApplyConfiguration) *LifecycleHandlerApplyConfiguration {
+	b.TCPSocket = value
+	return b
+}

staging/src/k8s.io/client-go/applyconfigurations/core/v1/probe.go

@@ -21,13 +21,13 @@ package v1
 // ProbeApplyConfiguration represents an declarative configuration of the Probe type for use
 // with apply.
 type ProbeApplyConfiguration struct {
-	HandlerApplyConfiguration     `json:",inline"`
-	InitialDelaySeconds           *int32 `json:"initialDelaySeconds,omitempty"`
-	TimeoutSeconds                *int32 `json:"timeoutSeconds,omitempty"`
-	PeriodSeconds                 *int32 `json:"periodSeconds,omitempty"`
-	SuccessThreshold              *int32 `json:"successThreshold,omitempty"`
-	FailureThreshold              *int32 `json:"failureThreshold,omitempty"`
-	TerminationGracePeriodSeconds *int64 `json:"terminationGracePeriodSeconds,omitempty"`
+	ProbeHandlerApplyConfiguration `json:",inline"`
+	InitialDelaySeconds            *int32 `json:"initialDelaySeconds,omitempty"`
+	TimeoutSeconds                 *int32 `json:"timeoutSeconds,omitempty"`
+	PeriodSeconds                  *int32 `json:"periodSeconds,omitempty"`
+	SuccessThreshold               *int32 `json:"successThreshold,omitempty"`
+	FailureThreshold               *int32 `json:"failureThreshold,omitempty"`
+	TerminationGracePeriodSeconds  *int64 `json:"terminationGracePeriodSeconds,omitempty"`
 }
 
 // ProbeApplyConfiguration constructs an declarative configuration of the Probe type for use with

staging/src/k8s.io/client-go/applyconfigurations/core/v1/probehandler.go

@@ -18,24 +18,24 @@ limitations under the License.
 
 package v1
 
-// HandlerApplyConfiguration represents an declarative configuration of the Handler type for use
+// ProbeHandlerApplyConfiguration represents an declarative configuration of the ProbeHandler type for use
 // with apply.
-type HandlerApplyConfiguration struct {
+type ProbeHandlerApplyConfiguration struct {
 	Exec      *ExecActionApplyConfiguration      `json:"exec,omitempty"`
 	HTTPGet   *HTTPGetActionApplyConfiguration   `json:"httpGet,omitempty"`
 	TCPSocket *TCPSocketActionApplyConfiguration `json:"tcpSocket,omitempty"`
 }
 
-// HandlerApplyConfiguration constructs an declarative configuration of the Handler type for use with
+// ProbeHandlerApplyConfiguration constructs an declarative configuration of the ProbeHandler type for use with
 // apply.
-func Handler() *HandlerApplyConfiguration {
-	return &HandlerApplyConfiguration{}
+func ProbeHandler() *ProbeHandlerApplyConfiguration {
+	return &ProbeHandlerApplyConfiguration{}
 }
 
 // WithExec sets the Exec 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 Exec field is set to the value of the last call.
-func (b *HandlerApplyConfiguration) WithExec(value *ExecActionApplyConfiguration) *HandlerApplyConfiguration {
+func (b *ProbeHandlerApplyConfiguration) WithExec(value *ExecActionApplyConfiguration) *ProbeHandlerApplyConfiguration {
 	b.Exec = value
 	return b
 }
@@ -43,7 +43,7 @@ func (b *HandlerApplyConfiguration) WithExec(value *ExecActionApplyConfiguration
 // WithHTTPGet sets the HTTPGet 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 HTTPGet field is set to the value of the last call.
-func (b *HandlerApplyConfiguration) WithHTTPGet(value *HTTPGetActionApplyConfiguration) *HandlerApplyConfiguration {
+func (b *ProbeHandlerApplyConfiguration) WithHTTPGet(value *HTTPGetActionApplyConfiguration) *ProbeHandlerApplyConfiguration {
 	b.HTTPGet = value
 	return b
 }
@@ -51,7 +51,7 @@ func (b *HandlerApplyConfiguration) WithHTTPGet(value *HTTPGetActionApplyConfigu
 // WithTCPSocket sets the TCPSocket 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 TCPSocket field is set to the value of the last call.
-func (b *HandlerApplyConfiguration) WithTCPSocket(value *TCPSocketActionApplyConfiguration) *HandlerApplyConfiguration {
+func (b *ProbeHandlerApplyConfiguration) WithTCPSocket(value *TCPSocketActionApplyConfiguration) *ProbeHandlerApplyConfiguration {
 	b.TCPSocket = value
 	return b
 }

staging/src/k8s.io/client-go/applyconfigurations/internal/internal.go

@@ -4199,18 +4199,6 @@ var schemaYAML = typed.YAMLObject(`types:
       type:
         scalar: string
       default: ""
-- name: io.k8s.api.core.v1.Handler
-  map:
-    fields:
-    - name: exec
-      type:
-        namedType: io.k8s.api.core.v1.ExecAction
-    - name: httpGet
-      type:
-        namedType: io.k8s.api.core.v1.HTTPGetAction
-    - name: tcpSocket
-      type:
-        namedType: io.k8s.api.core.v1.TCPSocketAction
 - name: io.k8s.api.core.v1.HostAlias
   map:
     fields:
@@ -4336,10 +4324,22 @@ var schemaYAML = typed.YAMLObject(`types:
     fields:
     - name: postStart
       type:
-        namedType: io.k8s.api.core.v1.Handler
+        namedType: io.k8s.api.core.v1.LifecycleHandler
     - name: preStop
       type:
-        namedType: io.k8s.api.core.v1.Handler
+        namedType: io.k8s.api.core.v1.LifecycleHandler
+- name: io.k8s.api.core.v1.LifecycleHandler
+  map:
+    fields:
+    - name: exec
+      type:
+        namedType: io.k8s.api.core.v1.ExecAction
+    - name: httpGet
+      type:
+        namedType: io.k8s.api.core.v1.HTTPGetAction
+    - name: tcpSocket
+      type:
+        namedType: io.k8s.api.core.v1.TCPSocketAction
 - name: io.k8s.api.core.v1.LimitRange
   map:
     fields:

staging/src/k8s.io/client-go/applyconfigurations/utils.go

@@ -551,8 +551,6 @@ func ForKind(kind schema.GroupVersionKind) interface{} {
 		return &applyconfigurationscorev1.GlusterfsPersistentVolumeSourceApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("GlusterfsVolumeSource"):
 		return &applyconfigurationscorev1.GlusterfsVolumeSourceApplyConfiguration{}
-	case corev1.SchemeGroupVersion.WithKind("Handler"):
-		return &applyconfigurationscorev1.HandlerApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("HostAlias"):
 		return &applyconfigurationscorev1.HostAliasApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("HostPathVolumeSource"):
@@ -569,6 +567,8 @@ func ForKind(kind schema.GroupVersionKind) interface{} {
 		return &applyconfigurationscorev1.KeyToPathApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("Lifecycle"):
 		return &applyconfigurationscorev1.LifecycleApplyConfiguration{}
+	case corev1.SchemeGroupVersion.WithKind("LifecycleHandler"):
+		return &applyconfigurationscorev1.LifecycleHandlerApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("LimitRange"):
 		return &applyconfigurationscorev1.LimitRangeApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("LimitRangeItem"):
@@ -683,6 +683,8 @@ func ForKind(kind schema.GroupVersionKind) interface{} {
 		return &applyconfigurationscorev1.PreferredSchedulingTermApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("Probe"):
 		return &applyconfigurationscorev1.ProbeApplyConfiguration{}
+	case corev1.SchemeGroupVersion.WithKind("ProbeHandler"):
+		return &applyconfigurationscorev1.ProbeHandlerApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("ProjectedVolumeSource"):
 		return &applyconfigurationscorev1.ProjectedVolumeSourceApplyConfiguration{}
 	case corev1.SchemeGroupVersion.WithKind("QuobyteVolumeSource"):