-
Notifications
You must be signed in to change notification settings - Fork 39.2k
/
etcd.go
177 lines (148 loc) · 6.12 KB
/
etcd.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package customresourcedefinition
import (
"context"
"fmt"
"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apiserver/pkg/registry/generic"
genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
"k8s.io/apiserver/pkg/registry/rest"
"k8s.io/apiserver/pkg/storage"
storageerr "k8s.io/apiserver/pkg/storage/errors"
)
// rest implements a RESTStorage for API services against etcd
type REST struct {
*genericregistry.Store
}
// NewREST returns a RESTStorage object that will work against API services.
func NewREST(scheme *runtime.Scheme, optsGetter generic.RESTOptionsGetter) *REST {
strategy := NewStrategy(scheme)
store := &genericregistry.Store{
NewFunc: func() runtime.Object { return &apiextensions.CustomResourceDefinition{} },
NewListFunc: func() runtime.Object { return &apiextensions.CustomResourceDefinitionList{} },
PredicateFunc: MatchCustomResourceDefinition,
DefaultQualifiedResource: apiextensions.Resource("customresourcedefinitions"),
CreateStrategy: strategy,
UpdateStrategy: strategy,
DeleteStrategy: strategy,
}
options := &generic.StoreOptions{RESTOptions: optsGetter, AttrFunc: GetAttrs}
if err := store.CompleteWithOptions(options); err != nil {
panic(err) // TODO: Propagate error up
}
return &REST{store}
}
// Implement ShortNamesProvider
var _ rest.ShortNamesProvider = &REST{}
// ShortNames implements the ShortNamesProvider interface. Returns a list of short names for a resource.
func (r *REST) ShortNames() []string {
return []string{"crd", "crds"}
}
// Delete adds the CRD finalizer to the list
func (r *REST) Delete(ctx context.Context, name string, options *metav1.DeleteOptions) (runtime.Object, bool, error) {
obj, err := r.Get(ctx, name, &metav1.GetOptions{})
if err != nil {
return nil, false, err
}
crd := obj.(*apiextensions.CustomResourceDefinition)
// Ensure we have a UID precondition
if options == nil {
options = metav1.NewDeleteOptions(0)
}
if options.Preconditions == nil {
options.Preconditions = &metav1.Preconditions{}
}
if options.Preconditions.UID == nil {
options.Preconditions.UID = &crd.UID
} else if *options.Preconditions.UID != crd.UID {
err = apierrors.NewConflict(
apiextensions.Resource("customresourcedefinitions"),
name,
fmt.Errorf("Precondition failed: UID in precondition: %v, UID in object meta: %v", *options.Preconditions.UID, crd.UID),
)
return nil, false, err
}
// upon first request to delete, add our finalizer and then delegate
if crd.DeletionTimestamp.IsZero() {
key, err := r.Store.KeyFunc(ctx, name)
if err != nil {
return nil, false, err
}
preconditions := storage.Preconditions{UID: options.Preconditions.UID}
out := r.Store.NewFunc()
err = r.Store.Storage.GuaranteedUpdate(
ctx, key, out, false, &preconditions,
storage.SimpleUpdate(func(existing runtime.Object) (runtime.Object, error) {
existingCRD, ok := existing.(*apiextensions.CustomResourceDefinition)
if !ok {
// wrong type
return nil, fmt.Errorf("expected *apiextensions.CustomResourceDefinition, got %v", existing)
}
// Set the deletion timestamp if needed
if existingCRD.DeletionTimestamp.IsZero() {
now := metav1.Now()
existingCRD.DeletionTimestamp = &now
}
if !apiextensions.CRDHasFinalizer(existingCRD, apiextensions.CustomResourceCleanupFinalizer) {
existingCRD.Finalizers = append(existingCRD.Finalizers, apiextensions.CustomResourceCleanupFinalizer)
}
// update the status condition too
apiextensions.SetCRDCondition(existingCRD, apiextensions.CustomResourceDefinitionCondition{
Type: apiextensions.Terminating,
Status: apiextensions.ConditionTrue,
Reason: "InstanceDeletionPending",
Message: "CustomResourceDefinition marked for deletion; CustomResource deletion will begin soon",
})
return existingCRD, nil
}),
)
if err != nil {
err = storageerr.InterpretGetError(err, apiextensions.Resource("customresourcedefinitions"), name)
err = storageerr.InterpretUpdateError(err, apiextensions.Resource("customresourcedefinitions"), name)
if _, ok := err.(*apierrors.StatusError); !ok {
err = apierrors.NewInternalError(err)
}
return nil, false, err
}
return out, false, nil
}
return r.Store.Delete(ctx, name, options)
}
// NewStatusREST makes a RESTStorage for status that has more limited options.
// It is based on the original REST so that we can share the same underlying store
func NewStatusREST(scheme *runtime.Scheme, rest *REST) *StatusREST {
statusStore := *rest.Store
statusStore.CreateStrategy = nil
statusStore.DeleteStrategy = nil
statusStore.UpdateStrategy = NewStatusStrategy(scheme)
return &StatusREST{store: &statusStore}
}
type StatusREST struct {
store *genericregistry.Store
}
var _ = rest.Patcher(&StatusREST{})
func (r *StatusREST) New() runtime.Object {
return &apiextensions.CustomResourceDefinition{}
}
// Get retrieves the object from the storage. It is required to support Patch.
func (r *StatusREST) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) {
return r.store.Get(ctx, name, options)
}
// Update alters the status subset of an object.
func (r *StatusREST) Update(ctx context.Context, name string, objInfo rest.UpdatedObjectInfo, createValidation rest.ValidateObjectFunc, updateValidation rest.ValidateObjectUpdateFunc) (runtime.Object, bool, error) {
return r.store.Update(ctx, name, objInfo, createValidation, updateValidation)
}