storage.go

Documentation: k8s.io/kubernetes/pkg/registry/admissionregistration/validatingadmissionpolicybinding/storage

     1  /*
     2  Copyright 2022 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/authorization/authorizer"
    25  	"k8s.io/apiserver/pkg/registry/generic"
    26  	genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
    27  	"k8s.io/apiserver/pkg/registry/rest"
    28  	"k8s.io/kubernetes/pkg/apis/admissionregistration"
    29  	"k8s.io/kubernetes/pkg/printers"
    30  	printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
    31  	printerstorage "k8s.io/kubernetes/pkg/printers/storage"
    32  	"k8s.io/kubernetes/pkg/registry/admissionregistration/resolver"
    33  	"k8s.io/kubernetes/pkg/registry/admissionregistration/validatingadmissionpolicybinding"
    34  )
    35  
    36  // REST implements a RESTStorage for policyBinding against etcd
    37  type REST struct {
    38  	*genericregistry.Store
    39  }
    40  
    41  var groupResource = admissionregistration.Resource("validatingadmissionpolicybindings")
    42  
    43  // NewREST returns a RESTStorage object that will work against policyBinding.
    44  func NewREST(optsGetter generic.RESTOptionsGetter, authorizer authorizer.Authorizer, policyGetter PolicyGetter, resourceResolver resolver.ResourceResolver) (*REST, error) {
    45  	r := &REST{}
    46  	strategy := validatingadmissionpolicybinding.NewStrategy(authorizer, policyGetter, resourceResolver)
    47  	store := &genericregistry.Store{
    48  		NewFunc:     func() runtime.Object { return &admissionregistration.ValidatingAdmissionPolicyBinding{} },
    49  		NewListFunc: func() runtime.Object { return &admissionregistration.ValidatingAdmissionPolicyBindingList{} },
    50  		ObjectNameFunc: func(obj runtime.Object) (string, error) {
    51  			return obj.(*admissionregistration.ValidatingAdmissionPolicyBinding).Name, nil
    52  		},
    53  		DefaultQualifiedResource:  groupResource,
    54  		SingularQualifiedResource: admissionregistration.Resource("validatingadmissionpolicybinding"),
    55  
    56  		CreateStrategy: strategy,
    57  		UpdateStrategy: strategy,
    58  		DeleteStrategy: strategy,
    59  
    60  		TableConvertor: printerstorage.TableConvertor{TableGenerator: printers.NewTableGenerator().With(printersinternal.AddHandlers)},
    61  	}
    62  	options := &generic.StoreOptions{RESTOptions: optsGetter}
    63  	if err := store.CompleteWithOptions(options); err != nil {
    64  		return nil, err
    65  	}
    66  	r.Store = store
    67  	return r, nil
    68  }
    69  
    70  // Implement CategoriesProvider
    71  var _ rest.CategoriesProvider = &REST{}
    72  
    73  // Categories implements the CategoriesProvider interface. Returns a list of categories a resource is part of.
    74  func (r *REST) Categories() []string {
    75  	return []string{"api-extensions"}
    76  }
    77  
    78  type PolicyGetter interface {
    79  	// GetValidatingAdmissionPolicy returns a GetValidatingAdmissionPolicy
    80  	// by its name. There is no namespace because it is cluster-scoped.
    81  	GetValidatingAdmissionPolicy(ctx context.Context, name string) (*admissionregistration.ValidatingAdmissionPolicy, error)
    82  }
    83  
    84  type DefaultPolicyGetter struct {
    85  	Getter rest.Getter
    86  }
    87  
    88  func (g *DefaultPolicyGetter) GetValidatingAdmissionPolicy(ctx context.Context, name string) (*admissionregistration.ValidatingAdmissionPolicy, error) {
    89  	p, err := g.Getter.Get(ctx, name, &metav1.GetOptions{})
    90  	if err != nil {
    91  		return nil, err
    92  	}
    93  	return p.(*admissionregistration.ValidatingAdmissionPolicy), err
    94  }
    95
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