-
Notifications
You must be signed in to change notification settings - Fork 3
/
crud.go
204 lines (178 loc) · 5.29 KB
/
crud.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
/*
Copyright 2022. projectsveltos.io. All rights reserved.
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 utils
import (
"context"
"time"
"github.com/go-logr/logr"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/dynamic"
logs "github.com/projectsveltos/libsveltos/lib/logsettings"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
// retryableErrorTimeout is the time process sleep before a retryble error is hit
retryableErrorTimeout = time.Second
)
// ListResources retrieves list of objects for a given namespace and list options.
// It is a simple wrapper around List, retrying in case of retryable error.
func (a *k8sAccess) ListResources(ctx context.Context, list client.ObjectList, opts ...client.ListOption) error {
i := 0
for {
err := a.client.List(ctx, list, opts...)
if err != nil {
if shouldRetry(err, i) {
time.Sleep(retryableErrorTimeout)
i++
} else {
return err
}
} else {
break
}
}
return nil
}
// UpdateResource creates or updates a resource in a CAPI Cluster.
func (a *k8sAccess) UpdateResourceWithDynamicResourceInterface(ctx context.Context, dr dynamic.ResourceInterface,
object *unstructured.Unstructured, logger logr.Logger) error {
l := logger.WithValues("resourceNamespace", object.GetNamespace(),
"resourceName", object.GetName(), "resourceGVK", object.GetObjectKind().GroupVersionKind())
l.V(logs.LogDebug).Info("deploying policy")
data, err := runtime.Encode(unstructured.UnstructuredJSONScheme, object)
if err != nil {
return err
}
forceConflict := true
options := metav1.PatchOptions{
FieldManager: "application/apply-patch",
Force: &forceConflict,
}
_, err = dr.Patch(ctx, object.GetName(), types.ApplyPatchType, data, options)
return err
}
// CreateResource saves the object obj in the Kubernetes cluster.
// It is a simple wrapper around Create, retrying in case of retryable error.
func (a *k8sAccess) CreateResource(ctx context.Context, obj client.Object, opts ...client.CreateOption) error {
i := 0
for {
err := a.client.Create(ctx, obj, opts...)
if err != nil {
if shouldRetry(err, i) {
time.Sleep(retryableErrorTimeout)
i++
} else {
return err
}
} else {
break
}
}
return nil
}
// GetResource retrieves an obj for the given object key from the Kubernetes Cluster.
// obj must be a struct pointer so that obj can be updated with the response returned by the Server.
// It is a simple wrapper around Get, retrying in case of retryable error.
func (a *k8sAccess) GetResource(ctx context.Context, key client.ObjectKey, obj client.Object) error {
i := 0
for {
err := a.client.Get(ctx, key, obj)
if err != nil {
if shouldRetry(err, i) {
time.Sleep(retryableErrorTimeout)
i++
} else {
return err
}
} else {
break
}
}
return nil
}
// UpdateResource updates an obj.
// It is a simple wrapper around Update, retrying in case of retryable error.
func (a *k8sAccess) UpdateResource(ctx context.Context, obj client.Object, opts ...client.UpdateOption) error {
i := 0
for {
err := a.client.Update(ctx, obj, opts...)
if err != nil {
if shouldRetry(err, i) {
time.Sleep(retryableErrorTimeout)
i++
} else {
return err
}
} else {
break
}
}
return nil
}
// UpdateResourceStatus updates an obj Status
// It is a simple wrapper around Status().Update, retrying in case of retryable error.
func (a *k8sAccess) UpdateResourceStatus(ctx context.Context, obj client.Object, opts ...client.SubResourceUpdateOption) error {
i := 0
for {
err := a.client.Status().Update(ctx, obj, opts...)
if err != nil {
if shouldRetry(err, i) {
time.Sleep(retryableErrorTimeout)
i++
} else {
return err
}
} else {
break
}
}
return nil
}
// DeleteResource deletes deletes the given obj from Kubernetes cluster.
// It is a simple wrapper around Delete, retrying in case of retryable error.
func (a *k8sAccess) DeleteResource(ctx context.Context, obj client.Object, opts ...client.DeleteOption) error {
i := 0
for {
err := a.client.Delete(ctx, obj, opts...)
if err != nil {
if shouldRetry(err, i) {
time.Sleep(retryableErrorTimeout)
i++
} else {
return err
}
} else {
break
}
}
return nil
}
// shouldRetry returns true when error is a retriable one
func shouldRetry(err error, i int) bool {
const maxRetry = 10
if i >= maxRetry {
return false
}
if apierrors.IsInternalError(err) || apierrors.IsTimeout(err) || apierrors.IsTooManyRequests(err) {
return true
}
// if the error sends the Retry-After header, we respect it as an explicit confirmation we should retry.
if _, shouldRetry := apierrors.SuggestsClientDelay(err); shouldRetry {
return true
}
return false
}