strategy.go

Documentation: k8s.io/kubernetes/pkg/registry/core/secret

     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 secret
    18  
    19  import (
    20  	"context"
    21  	"crypto/tls"
    22  	"fmt"
    23  
    24  	"k8s.io/apimachinery/pkg/fields"
    25  	"k8s.io/apimachinery/pkg/labels"
    26  	"k8s.io/apimachinery/pkg/runtime"
    27  	"k8s.io/apimachinery/pkg/util/validation/field"
    28  	"k8s.io/apiserver/pkg/registry/generic"
    29  	"k8s.io/apiserver/pkg/registry/rest"
    30  	pkgstorage "k8s.io/apiserver/pkg/storage"
    31  	"k8s.io/apiserver/pkg/storage/names"
    32  	"k8s.io/kubernetes/pkg/api/legacyscheme"
    33  	api "k8s.io/kubernetes/pkg/apis/core"
    34  	"k8s.io/kubernetes/pkg/apis/core/validation"
    35  )
    36  
    37  // strategy implements behavior for Secret objects
    38  type strategy struct {
    39  	runtime.ObjectTyper
    40  	names.NameGenerator
    41  }
    42  
    43  // Strategy is the default logic that applies when creating and updating Secret
    44  // objects via the REST API.
    45  var Strategy = strategy{legacyscheme.Scheme, names.SimpleNameGenerator}
    46  
    47  var _ = rest.RESTCreateStrategy(Strategy)
    48  
    49  var _ = rest.RESTUpdateStrategy(Strategy)
    50  
    51  func (strategy) NamespaceScoped() bool {
    52  	return true
    53  }
    54  
    55  func (strategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
    56  	secret := obj.(*api.Secret)
    57  	dropDisabledFields(secret, nil)
    58  }
    59  
    60  func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
    61  	return validation.ValidateSecret(obj.(*api.Secret))
    62  }
    63  
    64  // WarningsOnCreate returns warnings for the creation of the given object.
    65  func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
    66  	return warningsForSecret(obj.(*api.Secret))
    67  }
    68  
    69  func (strategy) Canonicalize(obj runtime.Object) {
    70  }
    71  
    72  func (strategy) AllowCreateOnUpdate() bool {
    73  	return false
    74  }
    75  
    76  func (strategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
    77  	newSecret := obj.(*api.Secret)
    78  	oldSecret := old.(*api.Secret)
    79  
    80  	// this is weird, but consistent with what the validatedUpdate function used to do.
    81  	if len(newSecret.Type) == 0 {
    82  		newSecret.Type = oldSecret.Type
    83  	}
    84  
    85  	dropDisabledFields(newSecret, oldSecret)
    86  }
    87  
    88  func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
    89  	return validation.ValidateSecretUpdate(obj.(*api.Secret), old.(*api.Secret))
    90  }
    91  
    92  // WarningsOnUpdate returns warnings for the given update.
    93  func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
    94  	return warningsForSecret(obj.(*api.Secret))
    95  }
    96  
    97  func dropDisabledFields(secret *api.Secret, oldSecret *api.Secret) {
    98  }
    99  
   100  func (strategy) AllowUnconditionalUpdate() bool {
   101  	return true
   102  }
   103  
   104  // GetAttrs returns labels and fields of a given object for filtering purposes.
   105  func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
   106  	secret, ok := obj.(*api.Secret)
   107  	if !ok {
   108  		return nil, nil, fmt.Errorf("not a secret")
   109  	}
   110  	return labels.Set(secret.Labels), SelectableFields(secret), nil
   111  }
   112  
   113  // Matcher returns a selection predicate for a given label and field selector.
   114  func Matcher(label labels.Selector, field fields.Selector) pkgstorage.SelectionPredicate {
   115  	return pkgstorage.SelectionPredicate{
   116  		Label:    label,
   117  		Field:    field,
   118  		GetAttrs: GetAttrs,
   119  	}
   120  }
   121  
   122  // SelectableFields returns a field set that can be used for filter selection
   123  func SelectableFields(obj *api.Secret) fields.Set {
   124  	objectMetaFieldsSet := generic.ObjectMetaFieldsSet(&obj.ObjectMeta, true)
   125  	secretSpecificFieldsSet := fields.Set{
   126  		"type": string(obj.Type),
   127  	}
   128  	return generic.MergeFieldsSets(objectMetaFieldsSet, secretSpecificFieldsSet)
   129  }
   130  
   131  func warningsForSecret(secret *api.Secret) []string {
   132  	var warnings []string
   133  	if secret.Type == api.SecretTypeTLS {
   134  		// Verify that the key matches the cert.
   135  		_, err := tls.X509KeyPair(secret.Data[api.TLSCertKey], secret.Data[api.TLSPrivateKeyKey])
   136  		if err != nil {
   137  			warnings = append(warnings, err.Error())
   138  		}
   139  	}
   140  	return warnings
   141  }
   142
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