代码拉取完成,页面将自动刷新
/*
Copyright 2017 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 resourcelock
import (
"encoding/json"
"errors"
"fmt"
"k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
)
// TODO: This is almost a exact replica of Endpoints lock.
// going forwards as we self host more and more components
// and use ConfigMaps as the means to pass that configuration
// data we will likely move to deprecate the Endpoints lock.
type ConfigMapLock struct {
// ConfigMapMeta should contain a Name and a Namespace of a
// ConfigMapMeta object that the LeaderElector will attempt to lead.
ConfigMapMeta metav1.ObjectMeta
Client corev1client.ConfigMapsGetter
LockConfig ResourceLockConfig
cm *v1.ConfigMap
}
// Get returns the election record from a ConfigMap Annotation
func (cml *ConfigMapLock) Get() (*LeaderElectionRecord, error) {
var record LeaderElectionRecord
var err error
cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Get(cml.ConfigMapMeta.Name, metav1.GetOptions{})
if err != nil {
return nil, err
}
if cml.cm.Annotations == nil {
cml.cm.Annotations = make(map[string]string)
}
if recordBytes, found := cml.cm.Annotations[LeaderElectionRecordAnnotationKey]; found {
if err := json.Unmarshal([]byte(recordBytes), &record); err != nil {
return nil, err
}
}
return &record, nil
}
// Create attempts to create a LeaderElectionRecord annotation
func (cml *ConfigMapLock) Create(ler LeaderElectionRecord) error {
recordBytes, err := json.Marshal(ler)
if err != nil {
return err
}
cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Create(&v1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: cml.ConfigMapMeta.Name,
Namespace: cml.ConfigMapMeta.Namespace,
Annotations: map[string]string{
LeaderElectionRecordAnnotationKey: string(recordBytes),
},
},
})
return err
}
// Update will update an existing annotation on a given resource.
func (cml *ConfigMapLock) Update(ler LeaderElectionRecord) error {
if cml.cm == nil {
return errors.New("endpoint not initialized, call get or create first")
}
recordBytes, err := json.Marshal(ler)
if err != nil {
return err
}
cml.cm.Annotations[LeaderElectionRecordAnnotationKey] = string(recordBytes)
cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Update(cml.cm)
return err
}
// RecordEvent in leader election while adding meta-data
func (cml *ConfigMapLock) RecordEvent(s string) {
events := fmt.Sprintf("%v %v", cml.LockConfig.Identity, s)
cml.LockConfig.EventRecorder.Eventf(&v1.ConfigMap{ObjectMeta: cml.cm.ObjectMeta}, v1.EventTypeNormal, "LeaderElection", events)
}
// Describe is used to convert details on current resource lock
// into a string
func (cml *ConfigMapLock) Describe() string {
return fmt.Sprintf("%v/%v", cml.ConfigMapMeta.Namespace, cml.ConfigMapMeta.Name)
}
// returns the Identity of the lock
func (cml *ConfigMapLock) Identity() string {
return cml.LockConfig.Identity
}
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。