vendor files

vendor/k8s.io/client-go/tools/leaderelection/resourcelock/configmaplock.go

@@ -0,0 +1,109 @@
+/*
+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 an
+	// ConfigMapMeta object that the Leadercmlector will attempt to lead.
+	ConfigMapMeta metav1.ObjectMeta
+	Client        corev1client.ConfigMapsGetter
+	LockConfig    ResourceLockConfig
+	cm            *v1.ConfigMap
+}
+
+// Get returns the cmlection 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 LeadercmlectionRecord 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 and 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 cmlection 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
+}