forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
storage.go
197 lines (163 loc) · 6.61 KB
/
storage.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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
/*
Copyright 2014 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.
*/
// If you make changes to this file, you should also make the corresponding change in ReplicaSet.
package storage
import (
"fmt"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
genericapirequest "k8s.io/apiserver/pkg/endpoints/request"
"k8s.io/apiserver/pkg/registry/generic"
genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
"k8s.io/apiserver/pkg/registry/rest"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/apis/autoscaling"
"k8s.io/kubernetes/pkg/apis/autoscaling/validation"
"k8s.io/kubernetes/pkg/printers"
printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
printerstorage "k8s.io/kubernetes/pkg/printers/storage"
"k8s.io/kubernetes/pkg/registry/cachesize"
"k8s.io/kubernetes/pkg/registry/core/replicationcontroller"
)
// ControllerStorage includes dummy storage for Replication Controllers and for Scale subresource.
type ControllerStorage struct {
Controller *REST
Status *StatusREST
Scale *ScaleREST
}
func NewStorage(optsGetter generic.RESTOptionsGetter) ControllerStorage {
controllerREST, statusREST := NewREST(optsGetter)
controllerRegistry := replicationcontroller.NewRegistry(controllerREST)
return ControllerStorage{
Controller: controllerREST,
Status: statusREST,
Scale: &ScaleREST{registry: controllerRegistry},
}
}
type REST struct {
*genericregistry.Store
}
// NewREST returns a RESTStorage object that will work against replication controllers.
func NewREST(optsGetter generic.RESTOptionsGetter) (*REST, *StatusREST) {
store := &genericregistry.Store{
Copier: api.Scheme,
NewFunc: func() runtime.Object { return &api.ReplicationController{} },
NewListFunc: func() runtime.Object { return &api.ReplicationControllerList{} },
PredicateFunc: replicationcontroller.MatchController,
DefaultQualifiedResource: api.Resource("replicationcontrollers"),
WatchCacheSize: cachesize.GetWatchCacheSizeByResource("replicationcontrollers"),
CreateStrategy: replicationcontroller.Strategy,
UpdateStrategy: replicationcontroller.Strategy,
DeleteStrategy: replicationcontroller.Strategy,
TableConvertor: printerstorage.TableConvertor{TablePrinter: printers.NewTablePrinter().With(printersinternal.AddHandlers)},
}
options := &generic.StoreOptions{RESTOptions: optsGetter, AttrFunc: replicationcontroller.GetAttrs}
if err := store.CompleteWithOptions(options); err != nil {
panic(err) // TODO: Propagate error up
}
statusStore := *store
statusStore.UpdateStrategy = replicationcontroller.StatusStrategy
return &REST{store}, &StatusREST{store: &statusStore}
}
// 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{"rc"}
}
// Implement CategoriesProvider
var _ rest.CategoriesProvider = &REST{}
// Categories implements the CategoriesProvider interface. Returns a list of categories a resource is part of.
func (r *REST) Categories() []string {
return []string{"all"}
}
// StatusREST implements the REST endpoint for changing the status of a replication controller
type StatusREST struct {
store *genericregistry.Store
}
func (r *StatusREST) New() runtime.Object {
return &api.ReplicationController{}
}
// Get retrieves the object from the storage. It is required to support Patch.
func (r *StatusREST) Get(ctx genericapirequest.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 genericapirequest.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
return r.store.Update(ctx, name, objInfo)
}
type ScaleREST struct {
registry replicationcontroller.Registry
}
// ScaleREST implements Patcher
var _ = rest.Patcher(&ScaleREST{})
// New creates a new Scale object
func (r *ScaleREST) New() runtime.Object {
return &autoscaling.Scale{}
}
func (r *ScaleREST) Get(ctx genericapirequest.Context, name string, options *metav1.GetOptions) (runtime.Object, error) {
rc, err := r.registry.GetController(ctx, name, options)
if err != nil {
return nil, errors.NewNotFound(autoscaling.Resource("replicationcontrollers/scale"), name)
}
return scaleFromRC(rc), nil
}
func (r *ScaleREST) Update(ctx genericapirequest.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
rc, err := r.registry.GetController(ctx, name, &metav1.GetOptions{})
if err != nil {
return nil, false, errors.NewNotFound(autoscaling.Resource("replicationcontrollers/scale"), name)
}
oldScale := scaleFromRC(rc)
obj, err := objInfo.UpdatedObject(ctx, oldScale)
if err != nil {
return nil, false, err
}
if obj == nil {
return nil, false, errors.NewBadRequest("nil update passed to Scale")
}
scale, ok := obj.(*autoscaling.Scale)
if !ok {
return nil, false, errors.NewBadRequest(fmt.Sprintf("wrong object passed to Scale update: %v", obj))
}
if errs := validation.ValidateScale(scale); len(errs) > 0 {
return nil, false, errors.NewInvalid(autoscaling.Kind("Scale"), scale.Name, errs)
}
rc.Spec.Replicas = scale.Spec.Replicas
rc.ResourceVersion = scale.ResourceVersion
rc, err = r.registry.UpdateController(ctx, rc)
if err != nil {
return nil, false, err
}
return scaleFromRC(rc), false, nil
}
// scaleFromRC returns a scale subresource for a replication controller.
func scaleFromRC(rc *api.ReplicationController) *autoscaling.Scale {
return &autoscaling.Scale{
ObjectMeta: metav1.ObjectMeta{
Name: rc.Name,
Namespace: rc.Namespace,
UID: rc.UID,
ResourceVersion: rc.ResourceVersion,
CreationTimestamp: rc.CreationTimestamp,
},
Spec: autoscaling.ScaleSpec{
Replicas: rc.Spec.Replicas,
},
Status: autoscaling.ScaleStatus{
Replicas: rc.Status.Replicas,
Selector: labels.SelectorFromSet(rc.Spec.Selector).String(),
},
}
}