| /* |
| Copyright 2015 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 storage |
| |
| import ( |
| "context" |
| "fmt" |
| |
| "k8s.io/apimachinery/pkg/api/errors" |
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| "k8s.io/apimachinery/pkg/runtime" |
| "k8s.io/apimachinery/pkg/runtime/schema" |
| "k8s.io/apiserver/pkg/registry/generic" |
| genericregistry "k8s.io/apiserver/pkg/registry/generic/registry" |
| "k8s.io/apiserver/pkg/registry/rest" |
| "k8s.io/kubernetes/pkg/apis/apps" |
| appsv1beta1 "k8s.io/kubernetes/pkg/apis/apps/v1beta1" |
| appsv1beta2 "k8s.io/kubernetes/pkg/apis/apps/v1beta2" |
| "k8s.io/kubernetes/pkg/apis/autoscaling" |
| autoscalingv1 "k8s.io/kubernetes/pkg/apis/autoscaling/v1" |
| autoscalingvalidation "k8s.io/kubernetes/pkg/apis/autoscaling/validation" |
| "k8s.io/kubernetes/pkg/printers" |
| printersinternal "k8s.io/kubernetes/pkg/printers/internalversion" |
| printerstorage "k8s.io/kubernetes/pkg/printers/storage" |
| "k8s.io/kubernetes/pkg/registry/apps/statefulset" |
| ) |
| |
| // StatefulSetStorage includes dummy storage for StatefulSets, and their Status and Scale subresource. |
| type StatefulSetStorage struct { |
| StatefulSet *REST |
| Status *StatusREST |
| Scale *ScaleREST |
| } |
| |
| func NewStorage(optsGetter generic.RESTOptionsGetter) StatefulSetStorage { |
| statefulSetRest, statefulSetStatusRest := NewREST(optsGetter) |
| |
| return StatefulSetStorage{ |
| StatefulSet: statefulSetRest, |
| Status: statefulSetStatusRest, |
| Scale: &ScaleREST{store: statefulSetRest.Store}, |
| } |
| } |
| |
| // rest implements a RESTStorage for statefulsets against etcd |
| type REST struct { |
| *genericregistry.Store |
| } |
| |
| // NewREST returns a RESTStorage object that will work against statefulsets. |
| func NewREST(optsGetter generic.RESTOptionsGetter) (*REST, *StatusREST) { |
| store := &genericregistry.Store{ |
| NewFunc: func() runtime.Object { return &apps.StatefulSet{} }, |
| NewListFunc: func() runtime.Object { return &apps.StatefulSetList{} }, |
| DefaultQualifiedResource: apps.Resource("statefulsets"), |
| |
| CreateStrategy: statefulset.Strategy, |
| UpdateStrategy: statefulset.Strategy, |
| DeleteStrategy: statefulset.Strategy, |
| |
| TableConvertor: printerstorage.TableConvertor{TablePrinter: printers.NewTablePrinter().With(printersinternal.AddHandlers)}, |
| } |
| options := &generic.StoreOptions{RESTOptions: optsGetter} |
| if err := store.CompleteWithOptions(options); err != nil { |
| panic(err) // TODO: Propagate error up |
| } |
| |
| statusStore := *store |
| statusStore.UpdateStrategy = statefulset.StatusStrategy |
| return &REST{store}, &StatusREST{store: &statusStore} |
| } |
| |
| // Implement CategoriesProvider |
| var _ rest.CategoriesProvider = &REST{} |
| |
| // Categories implements the CategoriesProvider interface. Returns a list of categories a resource is part of. |
| func (r *REST) Categories() []string { |
| return []string{"all"} |
| } |
| |
| // StatusREST implements the REST endpoint for changing the status of an statefulSet |
| type StatusREST struct { |
| store *genericregistry.Store |
| } |
| |
| func (r *StatusREST) New() runtime.Object { |
| return &apps.StatefulSet{} |
| } |
| |
| // Get retrieves the object from the storage. It is required to support Patch. |
| func (r *StatusREST) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) { |
| return r.store.Get(ctx, name, options) |
| } |
| |
| // Update alters the status subset of an object. |
| func (r *StatusREST) Update(ctx context.Context, name string, objInfo rest.UpdatedObjectInfo, createValidation rest.ValidateObjectFunc, updateValidation rest.ValidateObjectUpdateFunc, forceAllowCreate bool, options *metav1.UpdateOptions) (runtime.Object, bool, error) { |
| // We are explicitly setting forceAllowCreate to false in the call to the underlying storage because |
| // subresources should never allow create on update. |
| return r.store.Update(ctx, name, objInfo, createValidation, updateValidation, false, options) |
| } |
| |
| // Implement ShortNamesProvider |
| var _ rest.ShortNamesProvider = &REST{} |
| |
| // ShortNames implements the ShortNamesProvider interface. Returns a list of short names for a resource. |
| func (r *REST) ShortNames() []string { |
| return []string{"sts"} |
| } |
| |
| type ScaleREST struct { |
| store *genericregistry.Store |
| } |
| |
| // ScaleREST implements Patcher |
| var _ = rest.Patcher(&ScaleREST{}) |
| var _ = rest.GroupVersionKindProvider(&ScaleREST{}) |
| |
| func (r *ScaleREST) GroupVersionKind(containingGV schema.GroupVersion) schema.GroupVersionKind { |
| switch containingGV { |
| case appsv1beta1.SchemeGroupVersion: |
| return appsv1beta1.SchemeGroupVersion.WithKind("Scale") |
| case appsv1beta2.SchemeGroupVersion: |
| return appsv1beta2.SchemeGroupVersion.WithKind("Scale") |
| default: |
| return autoscalingv1.SchemeGroupVersion.WithKind("Scale") |
| } |
| } |
| |
| // New creates a new Scale object |
| func (r *ScaleREST) New() runtime.Object { |
| return &autoscaling.Scale{} |
| } |
| |
| func (r *ScaleREST) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) { |
| obj, err := r.store.Get(ctx, name, options) |
| if err != nil { |
| return nil, err |
| } |
| ss := obj.(*apps.StatefulSet) |
| scale, err := scaleFromStatefulSet(ss) |
| if err != nil { |
| return nil, errors.NewBadRequest(fmt.Sprintf("%v", err)) |
| } |
| return scale, err |
| } |
| |
| func (r *ScaleREST) Update(ctx context.Context, name string, objInfo rest.UpdatedObjectInfo, createValidation rest.ValidateObjectFunc, updateValidation rest.ValidateObjectUpdateFunc, forceAllowCreate bool, options *metav1.UpdateOptions) (runtime.Object, bool, error) { |
| obj, err := r.store.Get(ctx, name, &metav1.GetOptions{}) |
| if err != nil { |
| return nil, false, err |
| } |
| ss := obj.(*apps.StatefulSet) |
| |
| oldScale, err := scaleFromStatefulSet(ss) |
| if err != nil { |
| return nil, false, err |
| } |
| |
| obj, err = objInfo.UpdatedObject(ctx, oldScale) |
| if err != nil { |
| return nil, false, err |
| } |
| if obj == nil { |
| return nil, false, errors.NewBadRequest(fmt.Sprintf("nil update passed to Scale")) |
| } |
| scale, ok := obj.(*autoscaling.Scale) |
| if !ok { |
| return nil, false, errors.NewBadRequest(fmt.Sprintf("wrong object passed to Scale update: %v", obj)) |
| } |
| |
| if errs := autoscalingvalidation.ValidateScale(scale); len(errs) > 0 { |
| return nil, false, errors.NewInvalid(autoscaling.Kind("Scale"), scale.Name, errs) |
| } |
| |
| ss.Spec.Replicas = scale.Spec.Replicas |
| ss.ResourceVersion = scale.ResourceVersion |
| obj, _, err = r.store.Update(ctx, ss.Name, rest.DefaultUpdatedObjectInfo(ss), createValidation, updateValidation, false, options) |
| if err != nil { |
| return nil, false, err |
| } |
| ss = obj.(*apps.StatefulSet) |
| newScale, err := scaleFromStatefulSet(ss) |
| if err != nil { |
| return nil, false, errors.NewBadRequest(fmt.Sprintf("%v", err)) |
| } |
| return newScale, false, err |
| } |
| |
| // scaleFromStatefulSet returns a scale subresource for a statefulset. |
| func scaleFromStatefulSet(ss *apps.StatefulSet) (*autoscaling.Scale, error) { |
| selector, err := metav1.LabelSelectorAsSelector(ss.Spec.Selector) |
| if err != nil { |
| return nil, err |
| } |
| return &autoscaling.Scale{ |
| // TODO: Create a variant of ObjectMeta type that only contains the fields below. |
| ObjectMeta: metav1.ObjectMeta{ |
| Name: ss.Name, |
| Namespace: ss.Namespace, |
| UID: ss.UID, |
| ResourceVersion: ss.ResourceVersion, |
| CreationTimestamp: ss.CreationTimestamp, |
| }, |
| Spec: autoscaling.ScaleSpec{ |
| Replicas: ss.Spec.Replicas, |
| }, |
| Status: autoscaling.ScaleStatus{ |
| Replicas: ss.Status.Replicas, |
| Selector: selector.String(), |
| }, |
| }, nil |
| } |