/
strategy.go
226 lines (196 loc) · 7.82 KB
/
strategy.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
216
217
218
219
220
221
222
223
224
225
226
/*
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.
*/
package namespace
import (
"context"
"fmt"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/registry/generic"
apistorage "k8s.io/apiserver/pkg/storage"
"k8s.io/apiserver/pkg/storage/names"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/kubernetes/pkg/api/legacyscheme"
api "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/apis/core/validation"
"k8s.io/kubernetes/pkg/features"
"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
)
// namespaceStrategy implements behavior for Namespaces
type namespaceStrategy struct {
runtime.ObjectTyper
names.NameGenerator
}
// Strategy is the default logic that applies when creating and updating Namespace
// objects via the REST API.
var Strategy = namespaceStrategy{legacyscheme.Scheme, names.SimpleNameGenerator}
// NamespaceScoped is false for namespaces.
func (namespaceStrategy) NamespaceScoped() bool {
return false
}
// GetResetFields returns the set of fields that get reset by the strategy
// and should not be modified by the user.
func (namespaceStrategy) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
return map[fieldpath.APIVersion]*fieldpath.Set{
"v1": fieldpath.NewSet(
fieldpath.MakePathOrDie("status"),
),
}
}
// PrepareForCreate clears fields that are not allowed to be set by end users on creation.
func (namespaceStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
// on create, status is active
namespace := obj.(*api.Namespace)
namespace.Status = api.NamespaceStatus{
Phase: api.NamespaceActive,
}
// on create, we require the kubernetes value
// we cannot use this in defaults conversion because we let it get removed over life of object
hasKubeFinalizer := false
for i := range namespace.Spec.Finalizers {
if namespace.Spec.Finalizers[i] == api.FinalizerKubernetes {
hasKubeFinalizer = true
break
}
}
if !hasKubeFinalizer {
if len(namespace.Spec.Finalizers) == 0 {
namespace.Spec.Finalizers = []api.FinalizerName{api.FinalizerKubernetes}
} else {
namespace.Spec.Finalizers = append(namespace.Spec.Finalizers, api.FinalizerKubernetes)
}
}
}
// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
func (namespaceStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
newNamespace := obj.(*api.Namespace)
oldNamespace := old.(*api.Namespace)
newNamespace.Spec.Finalizers = oldNamespace.Spec.Finalizers
newNamespace.Status = oldNamespace.Status
}
// Validate validates a new namespace.
func (namespaceStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
namespace := obj.(*api.Namespace)
return validation.ValidateNamespace(namespace)
}
// Canonicalize normalizes the object after validation.
func (namespaceStrategy) Canonicalize(obj runtime.Object) {
// Ensure the label matches the name for namespaces just created using GenerateName,
// where the final name wasn't available for defaulting to make this change.
// This code needs to be kept in sync with the implementation that exists
// in Namespace defaulting (pkg/apis/core/v1)
// Why this hook *and* defaults.go?
//
// CREATE:
// Defaulting and PrepareForCreate happen before generateName is completed
// (i.e. the name is not yet known). Validation happens after generateName
// but should not modify objects. Canonicalize happens later, which makes
// it the best hook for setting the label.
//
// UPDATE:
// Defaulting and Canonicalize will both trigger with the full name.
//
// GET:
// Only defaulting will be applied.
ns := obj.(*api.Namespace)
if utilfeature.DefaultFeatureGate.Enabled(features.NamespaceDefaultLabelName) {
if ns.Labels == nil {
ns.Labels = map[string]string{}
}
ns.Labels[v1.LabelMetadataName] = ns.Name
}
}
// AllowCreateOnUpdate is false for namespaces.
func (namespaceStrategy) AllowCreateOnUpdate() bool {
return false
}
// ValidateUpdate is the default update validation for an end user.
func (namespaceStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
errorList := validation.ValidateNamespace(obj.(*api.Namespace))
return append(errorList, validation.ValidateNamespaceUpdate(obj.(*api.Namespace), old.(*api.Namespace))...)
}
func (namespaceStrategy) AllowUnconditionalUpdate() bool {
return true
}
type namespaceStatusStrategy struct {
namespaceStrategy
}
var StatusStrategy = namespaceStatusStrategy{Strategy}
// GetResetFields returns the set of fields that get reset by the strategy
// and should not be modified by the user.
func (namespaceStatusStrategy) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
return map[fieldpath.APIVersion]*fieldpath.Set{
"v1": fieldpath.NewSet(
fieldpath.MakePathOrDie("spec"),
),
}
}
func (namespaceStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
newNamespace := obj.(*api.Namespace)
oldNamespace := old.(*api.Namespace)
newNamespace.Spec = oldNamespace.Spec
}
func (namespaceStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
return validation.ValidateNamespaceStatusUpdate(obj.(*api.Namespace), old.(*api.Namespace))
}
type namespaceFinalizeStrategy struct {
namespaceStrategy
}
var FinalizeStrategy = namespaceFinalizeStrategy{Strategy}
func (namespaceFinalizeStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
return validation.ValidateNamespaceFinalizeUpdate(obj.(*api.Namespace), old.(*api.Namespace))
}
// GetResetFields returns the set of fields that get reset by the strategy
// and should not be modified by the user.
func (namespaceFinalizeStrategy) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
return map[fieldpath.APIVersion]*fieldpath.Set{
"v1": fieldpath.NewSet(
fieldpath.MakePathOrDie("status"),
),
}
}
// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
func (namespaceFinalizeStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
newNamespace := obj.(*api.Namespace)
oldNamespace := old.(*api.Namespace)
newNamespace.Status = oldNamespace.Status
}
// GetAttrs returns labels and fields of a given object for filtering purposes.
func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
namespaceObj, ok := obj.(*api.Namespace)
if !ok {
return nil, nil, fmt.Errorf("not a namespace")
}
return labels.Set(namespaceObj.Labels), NamespaceToSelectableFields(namespaceObj), nil
}
// MatchNamespace returns a generic matcher for a given label and field selector.
func MatchNamespace(label labels.Selector, field fields.Selector) apistorage.SelectionPredicate {
return apistorage.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: GetAttrs,
}
}
// NamespaceToSelectableFields returns a field set that represents the object
func NamespaceToSelectableFields(namespace *api.Namespace) fields.Set {
objectMetaFieldsSet := generic.ObjectMetaFieldsSet(&namespace.ObjectMeta, false)
specificFieldsSet := fields.Set{
"status.phase": string(namespace.Status.Phase),
// This is a bug, but we need to support it for backward compatibility.
"name": namespace.Name,
}
return generic.MergeFieldsSets(objectMetaFieldsSet, specificFieldsSet)
}