storage.go

Documentation: k8s.io/kubernetes/pkg/registry/core/persistentvolume/storage

     1  /*
     2  Copyright 2015 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package storage
    18  
    19  import (
    20  	"context"
    21  
    22  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    23  	"k8s.io/apimachinery/pkg/runtime"
    24  	"k8s.io/apiserver/pkg/registry/generic"
    25  	genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
    26  	"k8s.io/apiserver/pkg/registry/rest"
    27  	api "k8s.io/kubernetes/pkg/apis/core"
    28  	"k8s.io/kubernetes/pkg/printers"
    29  	printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
    30  	printerstorage "k8s.io/kubernetes/pkg/printers/storage"
    31  	"k8s.io/kubernetes/pkg/registry/core/persistentvolume"
    32  	"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
    33  )
    34  
    35  // REST implements a RESTStorage for persistent volumes.
    36  type REST struct {
    37  	*genericregistry.Store
    38  }
    39  
    40  // NewREST returns a RESTStorage object that will work against persistent volumes.
    41  func NewREST(optsGetter generic.RESTOptionsGetter) (*REST, *StatusREST, error) {
    42  	store := &genericregistry.Store{
    43  		NewFunc:                   func() runtime.Object { return &api.PersistentVolume{} },
    44  		NewListFunc:               func() runtime.Object { return &api.PersistentVolumeList{} },
    45  		PredicateFunc:             persistentvolume.MatchPersistentVolumes,
    46  		DefaultQualifiedResource:  api.Resource("persistentvolumes"),
    47  		SingularQualifiedResource: api.Resource("persistentvolume"),
    48  
    49  		CreateStrategy:      persistentvolume.Strategy,
    50  		UpdateStrategy:      persistentvolume.Strategy,
    51  		DeleteStrategy:      persistentvolume.Strategy,
    52  		ReturnDeletedObject: true,
    53  		ResetFieldsStrategy: persistentvolume.Strategy,
    54  
    55  		TableConvertor: printerstorage.TableConvertor{TableGenerator: printers.NewTableGenerator().With(printersinternal.AddHandlers)},
    56  	}
    57  	options := &generic.StoreOptions{RESTOptions: optsGetter, AttrFunc: persistentvolume.GetAttrs}
    58  	if err := store.CompleteWithOptions(options); err != nil {
    59  		return nil, nil, err
    60  	}
    61  
    62  	statusStore := *store
    63  	statusStore.UpdateStrategy = persistentvolume.StatusStrategy
    64  	statusStore.ResetFieldsStrategy = persistentvolume.StatusStrategy
    65  
    66  	return &REST{store}, &StatusREST{store: &statusStore}, nil
    67  }
    68  
    69  // Implement ShortNamesProvider
    70  var _ rest.ShortNamesProvider = &REST{}
    71  
    72  // ShortNames implements the ShortNamesProvider interface. Returns a list of short names for a resource.
    73  func (r *REST) ShortNames() []string {
    74  	return []string{"pv"}
    75  }
    76  
    77  // StatusREST implements the REST endpoint for changing the status of a persistentvolume.
    78  type StatusREST struct {
    79  	store *genericregistry.Store
    80  }
    81  
    82  // New creates a new PersistentVolume object.
    83  func (r *StatusREST) New() runtime.Object {
    84  	return &api.PersistentVolume{}
    85  }
    86  
    87  // Destroy cleans up resources on shutdown.
    88  func (r *StatusREST) Destroy() {
    89  	// Given that underlying store is shared with REST,
    90  	// we don't destroy it here explicitly.
    91  }
    92  
    93  // Get retrieves the object from the storage. It is required to support Patch.
    94  func (r *StatusREST) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) {
    95  	return r.store.Get(ctx, name, options)
    96  }
    97  
    98  // Update alters the status subset of an object.
    99  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) {
   100  	// We are explicitly setting forceAllowCreate to false in the call to the underlying storage because
   101  	// subresources should never allow create on update.
   102  	return r.store.Update(ctx, name, objInfo, createValidation, updateValidation, false, options)
   103  }
   104  
   105  // GetResetFields implements rest.ResetFieldsStrategy
   106  func (r *StatusREST) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
   107  	return r.store.GetResetFields()
   108  }
   109  
   110  func (r *StatusREST) ConvertToTable(ctx context.Context, object runtime.Object, tableOptions runtime.Object) (*metav1.Table, error) {
   111  	return r.store.ConvertToTable(ctx, object, tableOptions)
   112  }
   113
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