-
Notifications
You must be signed in to change notification settings - Fork 1
/
etcd.go
215 lines (182 loc) · 6.63 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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
/*
Copyright 2016 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 ReplicationController.
package etcd
import (
"fmt"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/api/rest"
"k8s.io/kubernetes/pkg/apis/extensions"
extvalidation "k8s.io/kubernetes/pkg/apis/extensions/validation"
"k8s.io/kubernetes/pkg/registry/cachesize"
"k8s.io/kubernetes/pkg/registry/generic"
"k8s.io/kubernetes/pkg/registry/generic/registry"
"k8s.io/kubernetes/pkg/registry/replicaset"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/storage"
)
// ReplicaSetStorage includes dummy storage for ReplicaSets and for Scale subresource.
type ReplicaSetStorage struct {
ReplicaSet *REST
Status *StatusREST
Scale *ScaleREST
}
func NewStorage(opts generic.RESTOptions) ReplicaSetStorage {
replicaSetRest, replicaSetStatusRest := NewREST(opts)
replicaSetRegistry := replicaset.NewRegistry(replicaSetRest)
return ReplicaSetStorage{
ReplicaSet: replicaSetRest,
Status: replicaSetStatusRest,
Scale: &ScaleREST{registry: replicaSetRegistry},
}
}
type REST struct {
*registry.Store
}
// NewREST returns a RESTStorage object that will work against ReplicaSet.
func NewREST(opts generic.RESTOptions) (*REST, *StatusREST) {
prefix := "/" + opts.ResourcePrefix
newListFunc := func() runtime.Object { return &extensions.ReplicaSetList{} }
storageInterface := opts.Decorator(
opts.StorageConfig,
cachesize.GetWatchCacheSizeByResource(cachesize.Replicasets),
&extensions.ReplicaSet{},
prefix,
replicaset.Strategy,
newListFunc,
storage.NoTriggerPublisher,
)
store := ®istry.Store{
NewFunc: func() runtime.Object { return &extensions.ReplicaSet{} },
// NewListFunc returns an object capable of storing results of an etcd list.
NewListFunc: newListFunc,
// Produces a path that etcd understands, to the root of the resource
// by combining the namespace in the context with the given prefix
KeyRootFunc: func(ctx api.Context) string {
return registry.NamespaceKeyRootFunc(ctx, prefix)
},
// Produces a path that etcd understands, to the resource by combining
// the namespace in the context with the given prefix
KeyFunc: func(ctx api.Context, name string) (string, error) {
return registry.NamespaceKeyFunc(ctx, prefix, name)
},
// Retrieve the name field of a ReplicaSet
ObjectNameFunc: func(obj runtime.Object) (string, error) {
return obj.(*extensions.ReplicaSet).Name, nil
},
// Used to match objects based on labels/fields for list and watch
PredicateFunc: replicaset.MatchReplicaSet,
QualifiedResource: api.Resource("replicasets"),
DeleteCollectionWorkers: opts.DeleteCollectionWorkers,
// Used to validate ReplicaSet creation
CreateStrategy: replicaset.Strategy,
// Used to validate ReplicaSet updates
UpdateStrategy: replicaset.Strategy,
DeleteStrategy: replicaset.Strategy,
Storage: storageInterface,
}
statusStore := *store
statusStore.UpdateStrategy = replicaset.StatusStrategy
return &REST{store}, &StatusREST{store: &statusStore}
}
// StatusREST implements the REST endpoint for changing the status of a ReplicaSet
type StatusREST struct {
store *registry.Store
}
func (r *StatusREST) New() runtime.Object {
return &extensions.ReplicaSet{}
}
// Get retrieves the object from the storage. It is required to support Patch.
func (r *StatusREST) Get(ctx api.Context, name string) (runtime.Object, error) {
return r.store.Get(ctx, name)
}
// Update alters the status subset of an object.
func (r *StatusREST) Update(ctx api.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
return r.store.Update(ctx, name, objInfo)
}
type ScaleREST struct {
registry replicaset.Registry
}
// ScaleREST implements Patcher
var _ = rest.Patcher(&ScaleREST{})
// New creates a new Scale object
func (r *ScaleREST) New() runtime.Object {
return &extensions.Scale{}
}
func (r *ScaleREST) Get(ctx api.Context, name string) (runtime.Object, error) {
rs, err := r.registry.GetReplicaSet(ctx, name)
if err != nil {
return nil, errors.NewNotFound(extensions.Resource("replicasets/scale"), name)
}
scale, err := scaleFromReplicaSet(rs)
if err != nil {
return nil, errors.NewBadRequest(fmt.Sprintf("%v", err))
}
return scale, err
}
func (r *ScaleREST) Update(ctx api.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
rs, err := r.registry.GetReplicaSet(ctx, name)
if err != nil {
return nil, false, errors.NewNotFound(extensions.Resource("replicasets/scale"), name)
}
oldScale, err := scaleFromReplicaSet(rs)
if err != nil {
return nil, false, err
}
obj, err := objInfo.UpdatedObject(ctx, oldScale)
if err != nil {
return nil, false, err
}
if obj == nil {
return nil, false, errors.NewBadRequest(fmt.Sprintf("nil update passed to Scale"))
}
scale, ok := obj.(*extensions.Scale)
if !ok {
return nil, false, errors.NewBadRequest(fmt.Sprintf("wrong object passed to Scale update: %v", obj))
}
if errs := extvalidation.ValidateScale(scale); len(errs) > 0 {
return nil, false, errors.NewInvalid(extensions.Kind("Scale"), scale.Name, errs)
}
rs.Spec.Replicas = scale.Spec.Replicas
rs.ResourceVersion = scale.ResourceVersion
rs, err = r.registry.UpdateReplicaSet(ctx, rs)
if err != nil {
return nil, false, err
}
newScale, err := scaleFromReplicaSet(rs)
if err != nil {
return nil, false, errors.NewBadRequest(fmt.Sprintf("%v", err))
}
return newScale, false, err
}
// scaleFromReplicaSet returns a scale subresource for a replica set.
func scaleFromReplicaSet(rs *extensions.ReplicaSet) (*extensions.Scale, error) {
return &extensions.Scale{
// TODO: Create a variant of ObjectMeta type that only contains the fields below.
ObjectMeta: api.ObjectMeta{
Name: rs.Name,
Namespace: rs.Namespace,
UID: rs.UID,
ResourceVersion: rs.ResourceVersion,
CreationTimestamp: rs.CreationTimestamp,
},
Spec: extensions.ScaleSpec{
Replicas: rs.Spec.Replicas,
},
Status: extensions.ScaleStatus{
Replicas: rs.Status.Replicas,
Selector: rs.Spec.Selector,
},
}, nil
}