/
strategy.go
161 lines (135 loc) · 5.67 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
// Copyright 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 seed
import (
"context"
apiequality "k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/storage/names"
"github.com/gardener/gardener/pkg/api"
"github.com/gardener/gardener/pkg/apis/core"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/apis/core/validation"
)
// Strategy defines the strategy for storing seeds.
type Strategy struct {
runtime.ObjectTyper
names.NameGenerator
}
// NewStrategy defines the storage strategy for Seeds.
func NewStrategy() Strategy {
return Strategy{api.Scheme, names.SimpleNameGenerator}
}
// NamespaceScoped returns true if the object must be within a namespace.
func (Strategy) NamespaceScoped() bool {
return false
}
// PrepareForCreate mutates some fields in the object before it's created.
func (s Strategy) PrepareForCreate(_ context.Context, obj runtime.Object) {
seed := obj.(*core.Seed)
seed.Generation = 1
seed.Status = core.SeedStatus{}
}
// PrepareForUpdate is invoked on update before validation to normalize
// the object. For example: remove fields that are not to be persisted,
// sort order-insensitive list fields, etc. This should not remove fields
// whose presence would be considered a validation error.
func (s Strategy) PrepareForUpdate(_ context.Context, obj, old runtime.Object) {
newSeed := obj.(*core.Seed)
oldSeed := old.(*core.Seed)
newSeed.Status = oldSeed.Status
if mustIncreaseGeneration(oldSeed, newSeed) {
newSeed.Generation = oldSeed.Generation + 1
}
}
func mustIncreaseGeneration(oldSeed, newSeed *core.Seed) bool {
// The spec changed
if !apiequality.Semantic.DeepEqual(oldSeed.Spec, newSeed.Spec) {
return true
}
// The deletion timestamp was set
if oldSeed.DeletionTimestamp == nil && newSeed.DeletionTimestamp != nil {
return true
}
// bump the generation in case certain operations were triggered
if oldSeed.Annotations[v1beta1constants.GardenerOperation] != newSeed.Annotations[v1beta1constants.GardenerOperation] {
switch newSeed.Annotations[v1beta1constants.GardenerOperation] {
case v1beta1constants.SeedOperationRenewGardenAccessSecrets:
return true
case v1beta1constants.GardenerOperationReconcile:
delete(newSeed.Annotations, v1beta1constants.GardenerOperation)
return true
case v1beta1constants.GardenerOperationRenewKubeconfig:
return true
}
}
return false
}
// Validate validates the given object.
func (Strategy) Validate(_ context.Context, obj runtime.Object) field.ErrorList {
seed := obj.(*core.Seed)
return validation.ValidateSeed(seed)
}
// Canonicalize allows an object to be mutated into a canonical form. This
// ensures that code that operates on these objects can rely on the common
// form for things like comparison. Canonicalize is invoked after
// validation has succeeded but before the object has been persisted.
// This method may mutate the object.
func (Strategy) Canonicalize(_ runtime.Object) {
}
// AllowCreateOnUpdate returns true if the object can be created by a PUT.
func (Strategy) AllowCreateOnUpdate() bool {
return false
}
// AllowUnconditionalUpdate returns true if the object can be updated
// unconditionally (irrespective of the latest resource version), when
// there is no resource version specified in the object.
func (Strategy) AllowUnconditionalUpdate() bool {
return true
}
// ValidateUpdate validates the update on the given old and new object.
func (Strategy) ValidateUpdate(_ context.Context, newObj, oldObj runtime.Object) field.ErrorList {
oldSeed, newSeed := oldObj.(*core.Seed), newObj.(*core.Seed)
return validation.ValidateSeedUpdate(newSeed, oldSeed)
}
// WarningsOnCreate returns warnings to the client performing a create.
func (Strategy) WarningsOnCreate(_ context.Context, _ runtime.Object) []string {
return nil
}
// WarningsOnUpdate returns warnings to the client performing the update.
func (Strategy) WarningsOnUpdate(_ context.Context, _, _ runtime.Object) []string {
return nil
}
// StatusStrategy defines the strategy for storing seeds statuses.
type StatusStrategy struct {
Strategy
}
// NewStatusStrategy defines the storage strategy for the status subresource of Seeds.
func NewStatusStrategy() StatusStrategy {
return StatusStrategy{NewStrategy()}
}
// PrepareForUpdate is invoked on update before validation to normalize
// the object. For example: remove fields that are not to be persisted,
// sort order-insensitive list fields, etc. This should not remove fields
// whose presence would be considered a validation error.
func (s StatusStrategy) PrepareForUpdate(_ context.Context, obj, old runtime.Object) {
newSeed := obj.(*core.Seed)
oldSeed := old.(*core.Seed)
newSeed.Spec = oldSeed.Spec
}
// ValidateUpdate validates the update on the given old and new object.
func (StatusStrategy) ValidateUpdate(_ context.Context, obj, old runtime.Object) field.ErrorList {
return validation.ValidateSeedStatusUpdate(obj.(*core.Seed), old.(*core.Seed))
}