pod terminationGracePeriodSeconds is always valid (kubernetes#124461)

* Pod terminationGracePeriodSeconds is always valid

Validation of a pod spec will always use the pod's
TerminationGracePeriodSeconds value.

A set of pod test-helpers have been created to help construct Pods.

* remove unused func

* reduction

* reduce 2

* simplify test

* report invalid grace period

* update SupplementalGroupPolicy tests

pkg/api/pod/testing/make.go

@@ -0,0 +1,293 @@
+/*
+Copyright 2024 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 testing
+
+import (
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	api "k8s.io/kubernetes/pkg/apis/core"
+	"k8s.io/utils/ptr"
+)
+
+// Tweak is a function that modifies a Pod.
+type Tweak func(*api.Pod)
+type TweakContainer func(*api.Container)
+
+// MakePod helps construct Pod objects (which pass API validation) more
+// legibly and tersely than a Go struct definition.  By default this produces
+// a Pod with a single container, ctr.  The caller can pass any number of tweak
+// functions to further modify the result.
+func MakePod(name string, tweaks ...Tweak) *api.Pod {
+	// NOTE: Any field that would be populated by defaulting needs to be
+	// present and valid here.
+	pod := &api.Pod{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      name,
+			Namespace: metav1.NamespaceDefault,
+		},
+		Spec: api.PodSpec{
+			Containers:                    []api.Container{MakeContainer("ctr")},
+			DNSPolicy:                     api.DNSClusterFirst,
+			RestartPolicy:                 api.RestartPolicyAlways,
+			TerminationGracePeriodSeconds: ptr.To[int64](v1.DefaultTerminationGracePeriodSeconds),
+		},
+	}
+
+	for _, tweak := range tweaks {
+		tweak(pod)
+	}
+
+	return pod
+}
+
+func MakePodSpec(policy api.RestartPolicy, tweaks ...Tweak) api.PodSpec {
+	return MakePod("", append([]Tweak{SetRestartPolicy(policy)}, tweaks...)...).Spec
+}
+
+func SetNamespace(ns string) Tweak {
+	return func(pod *api.Pod) {
+		pod.Namespace = ns
+	}
+}
+
+func SetResourceVersion(rv string) Tweak {
+	return func(pod *api.Pod) {
+		pod.ResourceVersion = rv
+	}
+}
+
+func SetContainers(containers ...api.Container) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.Containers = containers
+	}
+}
+
+func SetInitContainers(containers ...api.Container) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.InitContainers = containers
+	}
+}
+
+func SetEphemeralContainers(containers ...api.EphemeralContainer) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.EphemeralContainers = containers
+	}
+}
+
+func SetVolumes(volumes ...api.Volume) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.Volumes = volumes
+	}
+}
+
+func MakeEmptyVolume(name string) api.Volume {
+	return api.Volume{Name: name, VolumeSource: api.VolumeSource{EmptyDir: &api.EmptyDirVolumeSource{}}}
+}
+
+func SetNodeSelector(nodeSelector map[string]string) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.NodeSelector = nodeSelector
+	}
+}
+
+func SetNodeName(name string) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.NodeName = name
+	}
+}
+
+func SetActiveDeadlineSeconds(deadline int64) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.ActiveDeadlineSeconds = &deadline
+	}
+}
+
+func SetServiceAccountName(name string) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.ServiceAccountName = name
+	}
+}
+
+func SetSecurityContext(ctx *api.PodSecurityContext) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.SecurityContext = ctx
+	}
+}
+
+func SetAffinity(affinity *api.Affinity) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.Affinity = affinity
+	}
+}
+
+func SetHostAliases(hostAliases ...api.HostAlias) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.HostAliases = hostAliases
+	}
+}
+
+func SetPriorityClassName(name string) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.PriorityClassName = name
+	}
+}
+
+func SetRuntimeClassName(name string) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.RuntimeClassName = &name
+	}
+}
+
+func SetOverhead(overhead api.ResourceList) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.Overhead = overhead
+	}
+}
+
+func SetDNSPolicy(policy api.DNSPolicy) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.DNSPolicy = policy
+	}
+}
+
+func SetRestartPolicy(policy api.RestartPolicy) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.RestartPolicy = policy
+	}
+}
+
+func SetTolerations(tolerations ...api.Toleration) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.Tolerations = tolerations
+	}
+}
+
+func SetAnnotations(annos map[string]string) Tweak {
+	return func(pod *api.Pod) {
+		pod.Annotations = annos
+	}
+}
+
+func SetLabels(annos map[string]string) Tweak {
+	return func(pod *api.Pod) {
+		pod.Labels = annos
+	}
+}
+
+func SetSchedulingGates(gates ...api.PodSchedulingGate) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.SchedulingGates = gates
+	}
+}
+
+func SetTerminationGracePeriodSeconds(grace int64) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.TerminationGracePeriodSeconds = &grace
+	}
+}
+
+func SetOS(name api.OSName) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.OS = &api.PodOS{Name: name}
+	}
+}
+
+func SetStatus(status api.PodStatus) Tweak {
+	return func(pod *api.Pod) {
+		pod.Status = status
+	}
+}
+
+func SetResourceClaims(claims ...api.PodResourceClaim) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.ResourceClaims = claims
+	}
+}
+
+func SetTopologySpreadConstraints(tsc ...api.TopologySpreadConstraint) Tweak {
+	return func(pod *api.Pod) {
+		pod.Spec.TopologySpreadConstraints = tsc
+	}
+}
+
+func SetObjectMeta(objectMeta metav1.ObjectMeta) Tweak {
+	return func(pod *api.Pod) {
+		pod.ObjectMeta = objectMeta
+	}
+}
+
+func MakeContainer(name string, tweaks ...TweakContainer) api.Container {
+	cnr := api.Container{
+		Name: name, Image: "image", ImagePullPolicy: "IfNotPresent",
+		TerminationMessagePolicy: "File",
+		TerminationMessagePath:   v1.TerminationMessagePathDefault,
+	}
+
+	for _, tweak := range tweaks {
+		tweak(&cnr)
+	}
+
+	return cnr
+}
+
+func SetContainerImage(image string) TweakContainer {
+	return func(cnr *api.Container) {
+		cnr.Image = image
+	}
+}
+
+func MakeResourceRequirements(requests, limits map[string]string) api.ResourceRequirements {
+	rr := api.ResourceRequirements{Requests: api.ResourceList{}, Limits: api.ResourceList{}}
+	for k, v := range requests {
+		rr.Requests[api.ResourceName(k)] = resource.MustParse(v)
+	}
+	for k, v := range limits {
+		rr.Limits[api.ResourceName(k)] = resource.MustParse(v)
+	}
+	return rr
+}
+
+func SetContainerResources(rr api.ResourceRequirements) TweakContainer {
+	return func(cnr *api.Container) {
+		cnr.Resources = rr
+	}
+}
+
+func SetContainerPorts(ports ...api.ContainerPort) TweakContainer {
+	return func(cnr *api.Container) {
+		cnr.Ports = ports
+	}
+}
+
+func SetContainerResizePolicy(policies ...api.ContainerResizePolicy) TweakContainer {
+	return func(cnr *api.Container) {
+		cnr.ResizePolicy = policies
+	}
+}
+
+func SetContainerSecurityContext(ctx api.SecurityContext) TweakContainer {
+	return func(cnr *api.Container) {
+		cnr.SecurityContext = &ctx
+	}
+}
+
+func SetContainerRestartPolicy(policy api.ContainerRestartPolicy) TweakContainer {
+	return func(cnr *api.Container) {
+		cnr.RestartPolicy = &policy
+	}
+}