storage_coordination.go

Documentation: k8s.io/kubernetes/pkg/registry/coordination/rest

     1  /*
     2  Copyright 2018 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 rest
    18  
    19  import (
    20  	coordinationv1 "k8s.io/api/coordination/v1"
    21  	"k8s.io/apiserver/pkg/registry/generic"
    22  	"k8s.io/apiserver/pkg/registry/rest"
    23  	genericapiserver "k8s.io/apiserver/pkg/server"
    24  	serverstorage "k8s.io/apiserver/pkg/server/storage"
    25  	"k8s.io/kubernetes/pkg/api/legacyscheme"
    26  	"k8s.io/kubernetes/pkg/apis/coordination"
    27  	leasestorage "k8s.io/kubernetes/pkg/registry/coordination/lease/storage"
    28  )
    29  
    30  type RESTStorageProvider struct{}
    31  
    32  func (p RESTStorageProvider) NewRESTStorage(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter) (genericapiserver.APIGroupInfo, error) {
    33  	apiGroupInfo := genericapiserver.NewDefaultAPIGroupInfo(coordination.GroupName, legacyscheme.Scheme, legacyscheme.ParameterCodec, legacyscheme.Codecs)
    34  	// If you add a version here, be sure to add an entry in `k8s.io/kubernetes/cmd/kube-apiserver/app/aggregator.go with specific priorities.
    35  	// TODO refactor the plumbing to provide the information in the APIGroupInfo
    36  
    37  	if storageMap, err := p.v1Storage(apiResourceConfigSource, restOptionsGetter); err != nil {
    38  		return genericapiserver.APIGroupInfo{}, err
    39  	} else if len(storageMap) > 0 {
    40  		apiGroupInfo.VersionedResourcesStorageMap[coordinationv1.SchemeGroupVersion.Version] = storageMap
    41  	}
    42  	return apiGroupInfo, nil
    43  }
    44  
    45  func (p RESTStorageProvider) v1Storage(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter) (map[string]rest.Storage, error) {
    46  	storage := map[string]rest.Storage{}
    47  
    48  	// leases
    49  	if resource := "leases"; apiResourceConfigSource.ResourceEnabled(coordinationv1.SchemeGroupVersion.WithResource(resource)) {
    50  		leaseStorage, err := leasestorage.NewREST(restOptionsGetter)
    51  		if err != nil {
    52  			return storage, err
    53  		}
    54  		storage[resource] = leaseStorage
    55  	}
    56  	return storage, nil
    57  }
    58  
    59  func (p RESTStorageProvider) GroupName() string {
    60  	return coordination.GroupName
    61  }
    62
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