strategy.go

Documentation: k8s.io/kubernetes/pkg/registry/apiserverinternal/storageversion

     1  /*
     2  Copyright 2020 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 storageversion
    18  
    19  import (
    20  	"context"
    21  
    22  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    23  	"k8s.io/apimachinery/pkg/runtime"
    24  	"k8s.io/apimachinery/pkg/util/validation/field"
    25  	"k8s.io/apiserver/pkg/storage/names"
    26  	"k8s.io/kubernetes/pkg/api/legacyscheme"
    27  	"k8s.io/kubernetes/pkg/apis/apiserverinternal"
    28  	"k8s.io/kubernetes/pkg/apis/apiserverinternal/validation"
    29  	"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
    30  )
    31  
    32  // storageVersionStrategy implements verification logic for StorageVersion.
    33  type storageVersionStrategy struct {
    34  	runtime.ObjectTyper
    35  	names.NameGenerator
    36  }
    37  
    38  // Strategy is the default logic that applies when creating and updating StorageVersion objects.
    39  var Strategy = storageVersionStrategy{legacyscheme.Scheme, names.SimpleNameGenerator}
    40  
    41  // NamespaceScoped returns false because all StorageVersion's need to be cluster scoped
    42  func (storageVersionStrategy) NamespaceScoped() bool {
    43  	return false
    44  }
    45  
    46  // GetResetFields returns the set of fields that get reset by the strategy
    47  // and should not be modified by the user.
    48  func (storageVersionStrategy) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
    49  	fields := map[fieldpath.APIVersion]*fieldpath.Set{
    50  		"internal.apiserver.k8s.io/v1alpha1": fieldpath.NewSet(
    51  			fieldpath.MakePathOrDie("status"),
    52  		),
    53  	}
    54  
    55  	return fields
    56  }
    57  
    58  // PrepareForCreate clears the status of an StorageVersion before creation.
    59  func (storageVersionStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
    60  	sv := obj.(*apiserverinternal.StorageVersion)
    61  	sv.Status = apiserverinternal.StorageVersionStatus{}
    62  }
    63  
    64  // PrepareForUpdate clears fields that are not allowed to be set by end users on update.
    65  func (storageVersionStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
    66  	sv := obj.(*apiserverinternal.StorageVersion)
    67  	sv.Status = old.(*apiserverinternal.StorageVersion).Status
    68  }
    69  
    70  // Validate validates a new storageVersion.
    71  func (storageVersionStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
    72  	sv := obj.(*apiserverinternal.StorageVersion)
    73  	return validation.ValidateStorageVersion(sv)
    74  }
    75  
    76  // WarningsOnCreate returns warnings for the creation of the given object.
    77  func (storageVersionStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
    78  	return nil
    79  }
    80  
    81  // Canonicalize normalizes the object after validation.
    82  func (storageVersionStrategy) Canonicalize(obj runtime.Object) {
    83  }
    84  
    85  // Does not allow creating a StorageVersion object with a PUT request.
    86  func (storageVersionStrategy) AllowCreateOnUpdate() bool {
    87  	return false
    88  }
    89  
    90  // ValidateUpdate is the default update validation for an end user.
    91  func (storageVersionStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
    92  	newStorageVersion := obj.(*apiserverinternal.StorageVersion)
    93  	oldStorageVersion := old.(*apiserverinternal.StorageVersion)
    94  	validationErrorList := validation.ValidateStorageVersionUpdate(newStorageVersion, oldStorageVersion)
    95  	return validationErrorList
    96  }
    97  
    98  // WarningsOnUpdate returns warnings for the given update.
    99  func (storageVersionStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
   100  	return nil
   101  }
   102  
   103  // AllowUnconditionalUpdate is the default update policy for storageVersion objects. Status update should
   104  // only be allowed if version match.
   105  func (storageVersionStrategy) AllowUnconditionalUpdate() bool {
   106  	return false
   107  }
   108  
   109  type storageVersionStatusStrategy struct {
   110  	storageVersionStrategy
   111  }
   112  
   113  // StatusStrategy is the default logic invoked when updating object status.
   114  var StatusStrategy = storageVersionStatusStrategy{Strategy}
   115  
   116  // GetResetFields returns the set of fields that get reset by the strategy
   117  // and should not be modified by the user.
   118  func (storageVersionStatusStrategy) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
   119  	fields := map[fieldpath.APIVersion]*fieldpath.Set{
   120  		"internal.apiserver.k8s.io/v1alpha1": fieldpath.NewSet(
   121  			fieldpath.MakePathOrDie("metadata"),
   122  			fieldpath.MakePathOrDie("spec"),
   123  		),
   124  	}
   125  
   126  	return fields
   127  }
   128  
   129  func (storageVersionStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
   130  	newSV := obj.(*apiserverinternal.StorageVersion)
   131  	oldSV := old.(*apiserverinternal.StorageVersion)
   132  
   133  	newSV.Spec = oldSV.Spec
   134  	metav1.ResetObjectMetaForStatus(&newSV.ObjectMeta, &oldSV.ObjectMeta)
   135  }
   136  
   137  func (storageVersionStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
   138  	return validation.ValidateStorageVersionStatusUpdate(obj.(*apiserverinternal.StorageVersion), old.(*apiserverinternal.StorageVersion))
   139  }
   140  
   141  // WarningsOnUpdate returns warnings for the given update.
   142  func (storageVersionStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
   143  	return nil
   144  }
   145
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