storage_storagemigration.go

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

     1  /*
     2  Copyright 2024 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  	"k8s.io/apiserver/pkg/registry/generic"
    21  	"k8s.io/apiserver/pkg/registry/rest"
    22  	"k8s.io/klog/v2"
    23  	"k8s.io/kubernetes/pkg/api/legacyscheme"
    24  	"k8s.io/kubernetes/pkg/apis/storagemigration"
    25  	"k8s.io/kubernetes/pkg/features"
    26  
    27  	svmv1alpha1 "k8s.io/api/storagemigration/v1alpha1"
    28  	genericapiserver "k8s.io/apiserver/pkg/server"
    29  	serverstorage "k8s.io/apiserver/pkg/server/storage"
    30  	utilfeature "k8s.io/apiserver/pkg/util/feature"
    31  	storagemigrationstore "k8s.io/kubernetes/pkg/registry/storagemigration/storagemigration/storage"
    32  )
    33  
    34  type RESTStorageProvider struct{}
    35  
    36  func (p RESTStorageProvider) NewRESTStorage(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter) (genericapiserver.APIGroupInfo, error) {
    37  	apiGroupInfo := genericapiserver.NewDefaultAPIGroupInfo(storagemigration.GroupName, legacyscheme.Scheme, legacyscheme.ParameterCodec, legacyscheme.Codecs)
    38  
    39  	if storageMap, err := p.v1alpha1Storage(apiResourceConfigSource, restOptionsGetter); err != nil {
    40  		return genericapiserver.APIGroupInfo{}, err
    41  	} else if len(storageMap) > 0 {
    42  		apiGroupInfo.VersionedResourcesStorageMap[svmv1alpha1.SchemeGroupVersion.Version] = storageMap
    43  	}
    44  
    45  	return apiGroupInfo, nil
    46  }
    47  
    48  func (p RESTStorageProvider) v1alpha1Storage(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter) (map[string]rest.Storage, error) {
    49  	storage := map[string]rest.Storage{}
    50  
    51  	if resource := "storageversionmigrations"; apiResourceConfigSource.ResourceEnabled(svmv1alpha1.SchemeGroupVersion.WithResource(resource)) {
    52  		if utilfeature.DefaultFeatureGate.Enabled(features.StorageVersionMigrator) {
    53  			svm, svmStatus, err := storagemigrationstore.NewREST(restOptionsGetter)
    54  			if err != nil {
    55  				return nil, err
    56  			}
    57  			storage[resource] = svm
    58  			storage[resource+"/status"] = svmStatus
    59  		} else {
    60  			klog.Warning("StorageVersionMigrator storage is disabled because the StorageVersionMigrator feature gate is disabled")
    61  		}
    62  	}
    63  
    64  	return storage, nil
    65  }
    66  
    67  func (p RESTStorageProvider) GroupName() string {
    68  	return storagemigration.GroupName
    69  }
    70
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