forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
labels.go
278 lines (239 loc) · 10.6 KB
/
labels.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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
/*
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.
*/
package kuberuntime
import (
"encoding/json"
"strconv"
"github.com/golang/glog"
kubetypes "k8s.io/apimachinery/pkg/types"
"k8s.io/kubernetes/pkg/api/v1"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
"k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/kubelet/util/format"
)
const (
// TODO: change those label names to follow kubernetes's format
podDeletionGracePeriodLabel = "io.kubernetes.pod.deletionGracePeriod"
podTerminationGracePeriodLabel = "io.kubernetes.pod.terminationGracePeriod"
containerHashLabel = "io.kubernetes.container.hash"
containerRestartCountLabel = "io.kubernetes.container.restartCount"
containerTerminationMessagePathLabel = "io.kubernetes.container.terminationMessagePath"
containerTerminationMessagePolicyLabel = "io.kubernetes.container.terminationMessagePolicy"
containerPreStopHandlerLabel = "io.kubernetes.container.preStopHandler"
containerPortsLabel = "io.kubernetes.container.ports"
)
type labeledPodSandboxInfo struct {
// Labels from v1.Pod
Labels map[string]string
PodName string
PodNamespace string
PodUID kubetypes.UID
}
type annotatedPodSandboxInfo struct {
// Annotations from v1.Pod
Annotations map[string]string
}
type labeledContainerInfo struct {
ContainerName string
PodName string
PodNamespace string
PodUID kubetypes.UID
}
type annotatedContainerInfo struct {
Hash uint64
RestartCount int
PodDeletionGracePeriod *int64
PodTerminationGracePeriod *int64
TerminationMessagePath string
TerminationMessagePolicy v1.TerminationMessagePolicy
PreStopHandler *v1.Handler
ContainerPorts []v1.ContainerPort
}
// newPodLabels creates pod labels from v1.Pod.
func newPodLabels(pod *v1.Pod) map[string]string {
labels := map[string]string{}
// Get labels from v1.Pod
for k, v := range pod.Labels {
labels[k] = v
}
labels[types.KubernetesPodNameLabel] = pod.Name
labels[types.KubernetesPodNamespaceLabel] = pod.Namespace
labels[types.KubernetesPodUIDLabel] = string(pod.UID)
return labels
}
// newPodAnnotations creates pod annotations from v1.Pod.
func newPodAnnotations(pod *v1.Pod) map[string]string {
return pod.Annotations
}
// newContainerLabels creates container labels from v1.Container and v1.Pod.
func newContainerLabels(container *v1.Container, pod *v1.Pod) map[string]string {
labels := map[string]string{}
labels[types.KubernetesPodNameLabel] = pod.Name
labels[types.KubernetesPodNamespaceLabel] = pod.Namespace
labels[types.KubernetesPodUIDLabel] = string(pod.UID)
labels[types.KubernetesContainerNameLabel] = container.Name
return labels
}
// newContainerAnnotations creates container annotations from v1.Container and v1.Pod.
func newContainerAnnotations(container *v1.Container, pod *v1.Pod, restartCount int) map[string]string {
annotations := map[string]string{}
annotations[containerHashLabel] = strconv.FormatUint(kubecontainer.HashContainer(container), 16)
annotations[containerRestartCountLabel] = strconv.Itoa(restartCount)
annotations[containerTerminationMessagePathLabel] = container.TerminationMessagePath
annotations[containerTerminationMessagePolicyLabel] = string(container.TerminationMessagePolicy)
if pod.DeletionGracePeriodSeconds != nil {
annotations[podDeletionGracePeriodLabel] = strconv.FormatInt(*pod.DeletionGracePeriodSeconds, 10)
}
if pod.Spec.TerminationGracePeriodSeconds != nil {
annotations[podTerminationGracePeriodLabel] = strconv.FormatInt(*pod.Spec.TerminationGracePeriodSeconds, 10)
}
if container.Lifecycle != nil && container.Lifecycle.PreStop != nil {
// Using json enconding so that the PreStop handler object is readable after writing as a label
rawPreStop, err := json.Marshal(container.Lifecycle.PreStop)
if err != nil {
glog.Errorf("Unable to marshal lifecycle PreStop handler for container %q of pod %q: %v", container.Name, format.Pod(pod), err)
} else {
annotations[containerPreStopHandlerLabel] = string(rawPreStop)
}
}
if len(container.Ports) > 0 {
rawContainerPorts, err := json.Marshal(container.Ports)
if err != nil {
glog.Errorf("Unable to marshal container ports for container %q for pod %q: %v", container.Name, format.Pod(pod), err)
} else {
annotations[containerPortsLabel] = string(rawContainerPorts)
}
}
return annotations
}
// getPodSandboxInfoFromLabels gets labeledPodSandboxInfo from labels.
func getPodSandboxInfoFromLabels(labels map[string]string) *labeledPodSandboxInfo {
podSandboxInfo := &labeledPodSandboxInfo{
Labels: make(map[string]string),
PodName: getStringValueFromLabel(labels, types.KubernetesPodNameLabel),
PodNamespace: getStringValueFromLabel(labels, types.KubernetesPodNamespaceLabel),
PodUID: kubetypes.UID(getStringValueFromLabel(labels, types.KubernetesPodUIDLabel)),
}
// Remain only labels from v1.Pod
for k, v := range labels {
if k != types.KubernetesPodNameLabel && k != types.KubernetesPodNamespaceLabel && k != types.KubernetesPodUIDLabel {
podSandboxInfo.Labels[k] = v
}
}
return podSandboxInfo
}
// getPodSandboxInfoFromAnnotations gets annotatedPodSandboxInfo from annotations.
func getPodSandboxInfoFromAnnotations(annotations map[string]string) *annotatedPodSandboxInfo {
return &annotatedPodSandboxInfo{
Annotations: annotations,
}
}
// getContainerInfoFromLabels gets labeledContainerInfo from labels.
func getContainerInfoFromLabels(labels map[string]string) *labeledContainerInfo {
return &labeledContainerInfo{
PodName: getStringValueFromLabel(labels, types.KubernetesPodNameLabel),
PodNamespace: getStringValueFromLabel(labels, types.KubernetesPodNamespaceLabel),
PodUID: kubetypes.UID(getStringValueFromLabel(labels, types.KubernetesPodUIDLabel)),
ContainerName: getStringValueFromLabel(labels, types.KubernetesContainerNameLabel),
}
}
// getContainerInfoFromAnnotations gets annotatedContainerInfo from annotations.
func getContainerInfoFromAnnotations(annotations map[string]string) *annotatedContainerInfo {
var err error
containerInfo := &annotatedContainerInfo{
TerminationMessagePath: getStringValueFromLabel(annotations, containerTerminationMessagePathLabel),
TerminationMessagePolicy: v1.TerminationMessagePolicy(getStringValueFromLabel(annotations, containerTerminationMessagePolicyLabel)),
}
if containerInfo.Hash, err = getUint64ValueFromLabel(annotations, containerHashLabel); err != nil {
glog.Errorf("Unable to get %q from annotations %q: %v", containerHashLabel, annotations, err)
}
if containerInfo.RestartCount, err = getIntValueFromLabel(annotations, containerRestartCountLabel); err != nil {
glog.Errorf("Unable to get %q from annotations %q: %v", containerRestartCountLabel, annotations, err)
}
if containerInfo.PodDeletionGracePeriod, err = getInt64PointerFromLabel(annotations, podDeletionGracePeriodLabel); err != nil {
glog.Errorf("Unable to get %q from annotations %q: %v", podDeletionGracePeriodLabel, annotations, err)
}
if containerInfo.PodTerminationGracePeriod, err = getInt64PointerFromLabel(annotations, podTerminationGracePeriodLabel); err != nil {
glog.Errorf("Unable to get %q from annotations %q: %v", podTerminationGracePeriodLabel, annotations, err)
}
preStopHandler := &v1.Handler{}
if found, err := getJSONObjectFromLabel(annotations, containerPreStopHandlerLabel, preStopHandler); err != nil {
glog.Errorf("Unable to get %q from annotations %q: %v", containerPreStopHandlerLabel, annotations, err)
} else if found {
containerInfo.PreStopHandler = preStopHandler
}
containerPorts := []v1.ContainerPort{}
if found, err := getJSONObjectFromLabel(annotations, containerPortsLabel, &containerPorts); err != nil {
glog.Errorf("Unable to get %q from annotations %q: %v", containerPortsLabel, annotations, err)
} else if found {
containerInfo.ContainerPorts = containerPorts
}
return containerInfo
}
func getStringValueFromLabel(labels map[string]string, label string) string {
if value, found := labels[label]; found {
return value
}
// Do not report error, because there should be many old containers without label now.
glog.V(3).Infof("Container doesn't have label %s, it may be an old or invalid container", label)
// Return empty string "" for these containers, the caller will get value by other ways.
return ""
}
func getIntValueFromLabel(labels map[string]string, label string) (int, error) {
if strValue, found := labels[label]; found {
intValue, err := strconv.Atoi(strValue)
if err != nil {
// This really should not happen. Just set value to 0 to handle this abnormal case
return 0, err
}
return intValue, nil
}
// Do not report error, because there should be many old containers without label now.
glog.V(3).Infof("Container doesn't have label %s, it may be an old or invalid container", label)
// Just set the value to 0
return 0, nil
}
func getUint64ValueFromLabel(labels map[string]string, label string) (uint64, error) {
if strValue, found := labels[label]; found {
intValue, err := strconv.ParseUint(strValue, 16, 64)
if err != nil {
// This really should not happen. Just set value to 0 to handle this abnormal case
return 0, err
}
return intValue, nil
}
// Do not report error, because there should be many old containers without label now.
glog.V(3).Infof("Container doesn't have label %s, it may be an old or invalid container", label)
// Just set the value to 0
return 0, nil
}
func getInt64PointerFromLabel(labels map[string]string, label string) (*int64, error) {
if strValue, found := labels[label]; found {
int64Value, err := strconv.ParseInt(strValue, 10, 64)
if err != nil {
return nil, err
}
return &int64Value, nil
}
// If the label is not found, return pointer nil.
return nil, nil
}
// getJSONObjectFromLabel returns a bool value indicating whether an object is found.
func getJSONObjectFromLabel(labels map[string]string, label string, value interface{}) (bool, error) {
if strValue, found := labels[label]; found {
err := json.Unmarshal([]byte(strValue), value)
return found, err
}
// If the label is not found, return not found.
return false, nil
}