144 lines
5.4 KiB
Go
144 lines
5.4 KiB
Go
/*
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Copyright 2014 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 petset
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import (
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"fmt"
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"reflect"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/util/validation/field"
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genericapirequest "k8s.io/apiserver/pkg/endpoints/request"
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"k8s.io/apiserver/pkg/storage/names"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/apis/apps"
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"k8s.io/kubernetes/pkg/apis/apps/validation"
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"k8s.io/kubernetes/pkg/genericapiserver/registry/generic"
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"k8s.io/kubernetes/pkg/storage"
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)
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// statefulSetStrategy implements verification logic for Replication StatefulSets.
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type statefulSetStrategy struct {
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runtime.ObjectTyper
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names.NameGenerator
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}
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// Strategy is the default logic that applies when creating and updating Replication StatefulSet objects.
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var Strategy = statefulSetStrategy{api.Scheme, names.SimpleNameGenerator}
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// NamespaceScoped returns true because all StatefulSet' need to be within a namespace.
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func (statefulSetStrategy) NamespaceScoped() bool {
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return true
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}
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// PrepareForCreate clears the status of an StatefulSet before creation.
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func (statefulSetStrategy) PrepareForCreate(ctx genericapirequest.Context, obj runtime.Object) {
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statefulSet := obj.(*apps.StatefulSet)
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// create cannot set status
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statefulSet.Status = apps.StatefulSetStatus{}
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statefulSet.Generation = 1
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}
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// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
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func (statefulSetStrategy) PrepareForUpdate(ctx genericapirequest.Context, obj, old runtime.Object) {
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newStatefulSet := obj.(*apps.StatefulSet)
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oldStatefulSet := old.(*apps.StatefulSet)
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// Update is not allowed to set status
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newStatefulSet.Status = oldStatefulSet.Status
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// Any changes to the spec increment the generation number, any changes to the
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// status should reflect the generation number of the corresponding object.
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// See metav1.ObjectMeta description for more information on Generation.
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if !reflect.DeepEqual(oldStatefulSet.Spec, newStatefulSet.Spec) {
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newStatefulSet.Generation = oldStatefulSet.Generation + 1
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}
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}
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// Validate validates a new StatefulSet.
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func (statefulSetStrategy) Validate(ctx genericapirequest.Context, obj runtime.Object) field.ErrorList {
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statefulSet := obj.(*apps.StatefulSet)
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return validation.ValidateStatefulSet(statefulSet)
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}
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// Canonicalize normalizes the object after validation.
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func (statefulSetStrategy) Canonicalize(obj runtime.Object) {
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}
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// AllowCreateOnUpdate is false for StatefulSet; this means POST is needed to create one.
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func (statefulSetStrategy) AllowCreateOnUpdate() bool {
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return false
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}
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// ValidateUpdate is the default update validation for an end user.
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func (statefulSetStrategy) ValidateUpdate(ctx genericapirequest.Context, obj, old runtime.Object) field.ErrorList {
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validationErrorList := validation.ValidateStatefulSet(obj.(*apps.StatefulSet))
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updateErrorList := validation.ValidateStatefulSetUpdate(obj.(*apps.StatefulSet), old.(*apps.StatefulSet))
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return append(validationErrorList, updateErrorList...)
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}
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// AllowUnconditionalUpdate is the default update policy for StatefulSet objects.
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func (statefulSetStrategy) AllowUnconditionalUpdate() bool {
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return true
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}
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// StatefulSetToSelectableFields returns a field set that represents the object.
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func StatefulSetToSelectableFields(statefulSet *apps.StatefulSet) fields.Set {
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return generic.ObjectMetaFieldsSet(&statefulSet.ObjectMeta, true)
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}
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// GetAttrs returns labels and fields of a given object for filtering purposes.
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func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
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statefulSet, ok := obj.(*apps.StatefulSet)
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if !ok {
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return nil, nil, fmt.Errorf("given object is not an StatefulSet.")
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}
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return labels.Set(statefulSet.ObjectMeta.Labels), StatefulSetToSelectableFields(statefulSet), nil
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}
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// MatchStatefulSet is the filter used by the generic etcd backend to watch events
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// from etcd to clients of the apiserver only interested in specific labels/fields.
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func MatchStatefulSet(label labels.Selector, field fields.Selector) storage.SelectionPredicate {
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return storage.SelectionPredicate{
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Label: label,
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Field: field,
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GetAttrs: GetAttrs,
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}
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}
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type statefulSetStatusStrategy struct {
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statefulSetStrategy
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}
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var StatusStrategy = statefulSetStatusStrategy{Strategy}
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// PrepareForUpdate clears fields that are not allowed to be set by end users on update of status
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func (statefulSetStatusStrategy) PrepareForUpdate(ctx genericapirequest.Context, obj, old runtime.Object) {
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newStatefulSet := obj.(*apps.StatefulSet)
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oldStatefulSet := old.(*apps.StatefulSet)
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// status changes are not allowed to update spec
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newStatefulSet.Spec = oldStatefulSet.Spec
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}
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// ValidateUpdate is the default update validation for an end user updating status
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func (statefulSetStatusStrategy) ValidateUpdate(ctx genericapirequest.Context, obj, old runtime.Object) field.ErrorList {
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// TODO: Validate status updates.
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return validation.ValidateStatefulSetStatusUpdate(obj.(*apps.StatefulSet), old.(*apps.StatefulSet))
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}
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