mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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238 lines
12 KiB
Go
238 lines
12 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package validation
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import (
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"fmt"
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"reflect"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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unversionedvalidation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/kubernetes/pkg/apis/apps"
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api "k8s.io/kubernetes/pkg/apis/core"
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apivalidation "k8s.io/kubernetes/pkg/apis/core/validation"
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)
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// ValidateStatefulSetName can be used to check whether the given StatefulSet name is valid.
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// Prefix indicates this name will be used as part of generation, in which case
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// trailing dashes are allowed.
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func ValidateStatefulSetName(name string, prefix bool) []string {
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// TODO: Validate that there's name for the suffix inserted by the pods.
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// Currently this is just "-index". In the future we may allow a user
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// specified list of suffixes and we need to validate the longest one.
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return apivalidation.NameIsDNSSubdomain(name, prefix)
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}
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// Validates the given template and ensures that it is in accordance with the desired selector.
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func ValidatePodTemplateSpecForStatefulSet(template *api.PodTemplateSpec, selector labels.Selector, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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if template == nil {
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allErrs = append(allErrs, field.Required(fldPath, ""))
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} else {
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if !selector.Empty() {
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// Verify that the StatefulSet selector matches the labels in template.
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labels := labels.Set(template.Labels)
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if !selector.Matches(labels) {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("metadata", "labels"), template.Labels, "`selector` does not match template `labels`"))
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}
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}
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// TODO: Add validation for PodSpec, currently this will check volumes, which we know will
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// fail. We should really check that the union of the given volumes and volumeClaims match
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// volume mounts in the containers.
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// allErrs = append(allErrs, apivalidation.ValidatePodTemplateSpec(template, fldPath)...)
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allErrs = append(allErrs, unversionedvalidation.ValidateLabels(template.Labels, fldPath.Child("labels"))...)
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allErrs = append(allErrs, apivalidation.ValidateAnnotations(template.Annotations, fldPath.Child("annotations"))...)
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allErrs = append(allErrs, apivalidation.ValidatePodSpecificAnnotations(template.Annotations, &template.Spec, fldPath.Child("annotations"))...)
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}
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return allErrs
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}
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// ValidateStatefulSetSpec tests if required fields in the StatefulSet spec are set.
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func ValidateStatefulSetSpec(spec *apps.StatefulSetSpec, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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switch spec.PodManagementPolicy {
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case "":
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allErrs = append(allErrs, field.Required(fldPath.Child("podManagementPolicy"), ""))
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case apps.OrderedReadyPodManagement, apps.ParallelPodManagement:
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default:
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allErrs = append(allErrs, field.Invalid(fldPath.Child("podManagementPolicy"), spec.PodManagementPolicy, fmt.Sprintf("must be '%s' or '%s'", apps.OrderedReadyPodManagement, apps.ParallelPodManagement)))
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}
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switch spec.UpdateStrategy.Type {
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case "":
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allErrs = append(allErrs, field.Required(fldPath.Child("updateStrategy"), ""))
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case apps.OnDeleteStatefulSetStrategyType:
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if spec.UpdateStrategy.RollingUpdate != nil {
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allErrs = append(
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allErrs,
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field.Invalid(
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fldPath.Child("updateStrategy").Child("rollingUpdate"),
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spec.UpdateStrategy.RollingUpdate,
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fmt.Sprintf("only allowed for updateStrategy '%s'", apps.RollingUpdateStatefulSetStrategyType)))
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}
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case apps.RollingUpdateStatefulSetStrategyType:
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if spec.UpdateStrategy.RollingUpdate != nil {
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allErrs = append(allErrs,
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apivalidation.ValidateNonnegativeField(
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int64(spec.UpdateStrategy.RollingUpdate.Partition),
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fldPath.Child("updateStrategy").Child("rollingUpdate").Child("partition"))...)
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}
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default:
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allErrs = append(allErrs,
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field.Invalid(fldPath.Child("updateStrategy"), spec.UpdateStrategy,
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fmt.Sprintf("must be '%s' or '%s'",
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apps.RollingUpdateStatefulSetStrategyType,
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apps.OnDeleteStatefulSetStrategyType)))
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}
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(spec.Replicas), fldPath.Child("replicas"))...)
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if spec.Selector == nil {
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allErrs = append(allErrs, field.Required(fldPath.Child("selector"), ""))
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} else {
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allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(spec.Selector, fldPath.Child("selector"))...)
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if len(spec.Selector.MatchLabels)+len(spec.Selector.MatchExpressions) == 0 {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is not valid for statefulset."))
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}
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}
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selector, err := metav1.LabelSelectorAsSelector(spec.Selector)
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if err != nil {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, ""))
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} else {
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allErrs = append(allErrs, ValidatePodTemplateSpecForStatefulSet(&spec.Template, selector, fldPath.Child("template"))...)
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}
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if spec.Template.Spec.RestartPolicy != api.RestartPolicyAlways {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("template", "spec", "restartPolicy"), spec.Template.Spec.RestartPolicy, []string{string(api.RestartPolicyAlways)}))
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}
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if spec.Template.Spec.ActiveDeadlineSeconds != nil {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("template", "spec", "activeDeadlineSeconds"), spec.Template.Spec.ActiveDeadlineSeconds, "must not be specified"))
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}
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return allErrs
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}
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// ValidateStatefulSet validates a StatefulSet.
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func ValidateStatefulSet(statefulSet *apps.StatefulSet) field.ErrorList {
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allErrs := apivalidation.ValidateObjectMeta(&statefulSet.ObjectMeta, true, ValidateStatefulSetName, field.NewPath("metadata"))
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allErrs = append(allErrs, ValidateStatefulSetSpec(&statefulSet.Spec, field.NewPath("spec"))...)
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return allErrs
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}
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// ValidateStatefulSetUpdate tests if required fields in the StatefulSet are set.
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func ValidateStatefulSetUpdate(statefulSet, oldStatefulSet *apps.StatefulSet) field.ErrorList {
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allErrs := apivalidation.ValidateObjectMetaUpdate(&statefulSet.ObjectMeta, &oldStatefulSet.ObjectMeta, field.NewPath("metadata"))
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restoreReplicas := statefulSet.Spec.Replicas
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statefulSet.Spec.Replicas = oldStatefulSet.Spec.Replicas
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restoreTemplate := statefulSet.Spec.Template
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statefulSet.Spec.Template = oldStatefulSet.Spec.Template
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restoreStrategy := statefulSet.Spec.UpdateStrategy
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statefulSet.Spec.UpdateStrategy = oldStatefulSet.Spec.UpdateStrategy
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if !reflect.DeepEqual(statefulSet.Spec, oldStatefulSet.Spec) {
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allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), "updates to statefulset spec for fields other than 'replicas', 'template', and 'updateStrategy' are forbidden."))
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}
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statefulSet.Spec.Replicas = restoreReplicas
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statefulSet.Spec.Template = restoreTemplate
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statefulSet.Spec.UpdateStrategy = restoreStrategy
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(statefulSet.Spec.Replicas), field.NewPath("spec", "replicas"))...)
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return allErrs
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}
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// ValidateStatefulSetStatus validates a StatefulSetStatus.
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func ValidateStatefulSetStatus(status *apps.StatefulSetStatus, fieldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.Replicas), fieldPath.Child("replicas"))...)
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.ReadyReplicas), fieldPath.Child("readyReplicas"))...)
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.CurrentReplicas), fieldPath.Child("currentReplicas"))...)
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.UpdatedReplicas), fieldPath.Child("updatedReplicas"))...)
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if status.ObservedGeneration != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*status.ObservedGeneration), fieldPath.Child("observedGeneration"))...)
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}
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if status.CollisionCount != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*status.CollisionCount), fieldPath.Child("collisionCount"))...)
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}
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msg := "cannot be greater than status.replicas"
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if status.ReadyReplicas > status.Replicas {
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allErrs = append(allErrs, field.Invalid(fieldPath.Child("readyReplicas"), status.ReadyReplicas, msg))
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}
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if status.CurrentReplicas > status.Replicas {
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allErrs = append(allErrs, field.Invalid(fieldPath.Child("currentReplicas"), status.CurrentReplicas, msg))
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}
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if status.UpdatedReplicas > status.Replicas {
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allErrs = append(allErrs, field.Invalid(fieldPath.Child("updatedReplicas"), status.UpdatedReplicas, msg))
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}
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return allErrs
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}
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// ValidateStatefulSetStatusUpdate tests if required fields in the StatefulSet are set.
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func ValidateStatefulSetStatusUpdate(statefulSet, oldStatefulSet *apps.StatefulSet) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, ValidateStatefulSetStatus(&statefulSet.Status, field.NewPath("status"))...)
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allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&statefulSet.ObjectMeta, &oldStatefulSet.ObjectMeta, field.NewPath("metadata"))...)
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// TODO: Validate status.
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if apivalidation.IsDecremented(statefulSet.Status.CollisionCount, oldStatefulSet.Status.CollisionCount) {
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value := int32(0)
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if statefulSet.Status.CollisionCount != nil {
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value = *statefulSet.Status.CollisionCount
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}
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allErrs = append(allErrs, field.Invalid(field.NewPath("status").Child("collisionCount"), value, "cannot be decremented"))
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}
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return allErrs
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}
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// ValidateControllerRevisionName can be used to check whether the given ControllerRevision name is valid.
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// Prefix indicates this name will be used as part of generation, in which case
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// trailing dashes are allowed.
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var ValidateControllerRevisionName = apivalidation.NameIsDNSSubdomain
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// ValidateControllerRevision collects errors for the fields of state and returns those errors as an ErrorList. If the
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// returned list is empty, state is valid. Validation is performed to ensure that state is a valid ObjectMeta, its name
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// is valid, and that it doesn't exceed the MaxControllerRevisionSize.
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func ValidateControllerRevision(revision *apps.ControllerRevision) field.ErrorList {
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errs := field.ErrorList{}
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errs = append(errs, apivalidation.ValidateObjectMeta(&revision.ObjectMeta, true, ValidateControllerRevisionName, field.NewPath("metadata"))...)
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if revision.Data == nil {
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errs = append(errs, field.Required(field.NewPath("data"), "data is mandatory"))
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}
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errs = append(errs, apivalidation.ValidateNonnegativeField(revision.Revision, field.NewPath("revision"))...)
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return errs
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}
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// ValidateControllerRevisionUpdate collects errors pertaining to the mutation of an ControllerRevision Object. If the
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// returned ErrorList is empty the update operation is valid. Any mutation to the ControllerRevision's Data or Revision
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// is considered to be invalid.
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func ValidateControllerRevisionUpdate(newHistory, oldHistory *apps.ControllerRevision) field.ErrorList {
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errs := field.ErrorList{}
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errs = append(errs, apivalidation.ValidateObjectMetaUpdate(&newHistory.ObjectMeta, &oldHistory.ObjectMeta, field.NewPath("metadata"))...)
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errs = append(errs, ValidateControllerRevision(newHistory)...)
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errs = append(errs, apivalidation.ValidateImmutableField(newHistory.Data, oldHistory.Data, field.NewPath("data"))...)
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return errs
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}
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