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configmap.go
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configmap.go
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package main
import (
"fmt"
"reflect"
"time"
log "github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/tools/cache"
)
func (c *Controller) syncConfigMap(key string) error {
obj, exists, _ := c.deletedConfigMapIndexer.GetByKey(key)
if exists {
log.Debug("Cleanup configmaps that were added by old origin ConfigMap")
c.deletedConfigMapIndexer.Delete(key)
s := obj.(*corev1.ConfigMap)
c.deleteSyncedConfigMaps(s)
}
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
runtime.HandleError(fmt.Errorf("invalid resource key: %s", key))
return nil
}
sourceConfigMap, err := c.configMapsLister.ConfigMaps(namespace).Get(name)
if err != nil {
if errors.IsNotFound(err) {
return nil
}
return err
}
namespaces, err := c.namespacesForLabel(sourceConfigMap.Annotations[syncAnnotation])
if err != nil {
return nil
}
newConfigMap := createNewConfigMap(sourceConfigMap)
for _, ns := range namespaces.UnsortedList() {
if ns == sourceConfigMap.Namespace {
continue
}
targetConfigMap, err := c.configMapsLister.ConfigMaps(ns).Get(newConfigMap.Name)
if err != nil {
if errors.IsNotFound(err) {
_, err = c.kubeclientset.CoreV1().ConfigMaps(ns).Create(newConfigMap)
if err != nil {
log.Error(err)
}
log.WithFields(log.Fields{"configMap": newConfigMap.Name, "namespace": ns}).Info("ConfigMap added")
} else {
log.Error(err)
}
continue
}
if reflect.DeepEqual(targetConfigMap.Data, newConfigMap.Data) {
log.WithFields(log.Fields{"configMap": newConfigMap.Name, "namespace": ns}).Debug("Data hasn't changed, dont sync")
continue
}
_, err = c.kubeclientset.CoreV1().ConfigMaps(ns).Update(newConfigMap)
if err != nil {
log.Error(err)
}
log.WithFields(log.Fields{"configMap": newConfigMap.Name, "namespace": ns}).Info("ConfigMap updated")
}
return nil
}
func (c *Controller) deleteSyncedConfigMaps(s *corev1.ConfigMap) {
log.Debug("ConfigMap was deleted, lets delete the synced copies")
namespaces, err := c.namespacesForLabel(s.Annotations[syncAnnotation])
if err != nil {
log.Error(err)
return
}
for _, ns := range namespaces.UnsortedList() {
if ns == s.Namespace {
continue
}
err = c.kubeclientset.CoreV1().ConfigMaps(ns).Delete(s.Name, &metav1.DeleteOptions{})
if err != nil {
log.Error(err)
}
log.WithFields(log.Fields{"ConfigMap": s.Name, "namespace": ns}).Info("ConfigMap deleted")
}
}
func createNewConfigMap(sourceConfigMap *corev1.ConfigMap) *corev1.ConfigMap {
newConfigMap := sourceConfigMap.DeepCopy()
delete(newConfigMap.Annotations, syncAnnotation)
newConfigMap.ResourceVersion = ""
newConfigMap.Namespace = ""
newConfigMap.UID = ""
newConfigMap.GenerateName = ""
newConfigMap.SelfLink = ""
newConfigMap.CreationTimestamp.Reset()
if newConfigMap.Annotations == nil {
newConfigMap.Annotations = make(map[string]string)
}
kubeSyncAnnotationValue := fmt.Sprintf(`{"namespace":%q,"name":%q,"uid":%q,"resourceVersion":%q,"label":%q,"last-update":%q}`,
sourceConfigMap.Namespace,
sourceConfigMap.Name,
sourceConfigMap.UID,
sourceConfigMap.ResourceVersion,
sourceConfigMap.Annotations[syncAnnotation],
time.Now().String())
newConfigMap.Annotations[fmt.Sprintf("%s-%s", syncAnnotation, "metadata")] = kubeSyncAnnotationValue
return newConfigMap
}