func (e *EndpointController) syncService(key string) {
startTime := time.Now()
defer func() {
glog.V(4).Infof("Finished syncing service %q endpoints. (%v)", key, time.Now().Sub(startTime))
}()
if !e.podStoreSynced() {
// Sleep so we give the pod reflector goroutine a chance to run.
time.Sleep(PodStoreSyncedPollPeriod)
glog.Infof("Waiting for pods controller to sync, requeuing service %v", key)
e.queue.Add(key)
return
}
obj, exists, err := e.serviceStore.Store.GetByKey(key)
if err != nil || !exists {
// Delete the corresponding endpoint, as the service has been deleted.
// TODO: Please note that this will delete an endpoint when a
// service is deleted. However, if we're down at the time when
// the service is deleted, we will miss that deletion, so this
// doesn't completely solve the problem. See #6877.
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
glog.Errorf("Need to delete endpoint with key %q, but couldn't understand the key: %v", key, err)
// Don't retry, as the key isn't going to magically become understandable.
return
}
err = e.client.Endpoints(namespace).Delete(name, nil)
if err != nil && !errors.IsNotFound(err) {
glog.Errorf("Error deleting endpoint %q: %v", key, err)
e.queue.Add(key) // Retry
}
return
}
service := obj.(*api.Service)
if service.Spec.Selector == nil {
// services without a selector receive no endpoints from this controller;
// these services will receive the endpoints that are created out-of-band via the REST API.
return
}
glog.V(5).Infof("About to update endpoints for service %q", key)
pods, err := e.podStore.Pods(service.Namespace).List(labels.Set(service.Spec.Selector).AsSelector())
if err != nil {
// Since we're getting stuff from a local cache, it is
// basically impossible to get this error.
glog.Errorf("Error syncing service %q: %v", key, err)
e.queue.Add(key) // Retry
return
}
subsets := []api.EndpointSubset{}
podHostNames := map[string]endpoints.HostRecord{}
var tolerateUnreadyEndpoints bool
if v, ok := service.Annotations[TolerateUnreadyEndpointsAnnotation]; ok {
b, err := strconv.ParseBool(v)
if err == nil {
tolerateUnreadyEndpoints = b
} else {
glog.Errorf("Failed to parse annotation %v: %v", TolerateUnreadyEndpointsAnnotation, err)
}
}
for i := range pods.Items {
pod := &pods.Items[i]
for i := range service.Spec.Ports {
servicePort := &service.Spec.Ports[i]
portName := servicePort.Name
portProto := servicePort.Protocol
portNum, err := podutil.FindPort(pod, servicePort)
if err != nil {
glog.V(4).Infof("Failed to find port for service %s/%s: %v", service.Namespace, service.Name, err)
continue
}
if len(pod.Status.PodIP) == 0 {
glog.V(5).Infof("Failed to find an IP for pod %s/%s", pod.Namespace, pod.Name)
continue
}
if pod.DeletionTimestamp != nil {
glog.V(5).Infof("Pod is being deleted %s/%s", pod.Namespace, pod.Name)
continue
}
epp := api.EndpointPort{Name: portName, Port: int32(portNum), Protocol: portProto}
epa := api.EndpointAddress{
IP: pod.Status.PodIP,
TargetRef: &api.ObjectReference{
Kind: "Pod",
Namespace: pod.ObjectMeta.Namespace,
Name: pod.ObjectMeta.Name,
UID: pod.ObjectMeta.UID,
ResourceVersion: pod.ObjectMeta.ResourceVersion,
}}
hostname := getHostname(pod)
if len(hostname) > 0 &&
getSubdomain(pod) == service.Name &&
service.Namespace == pod.Namespace {
hostRecord := endpoints.HostRecord{
HostName: hostname,
}
// TODO: stop populating podHostNames annotation in 1.4
podHostNames[string(pod.Status.PodIP)] = hostRecord
epa.Hostname = hostname
}
if tolerateUnreadyEndpoints || api.IsPodReady(pod) {
subsets = append(subsets, api.EndpointSubset{
Addresses: []api.EndpointAddress{epa},
Ports: []api.EndpointPort{epp},
})
} else {
glog.V(5).Infof("Pod is out of service: %v/%v", pod.Namespace, pod.Name)
subsets = append(subsets, api.EndpointSubset{
NotReadyAddresses: []api.EndpointAddress{epa},
Ports: []api.EndpointPort{epp},
})
}
}
}
subsets = endpoints.RepackSubsets(subsets)
// See if there's actually an update here.
currentEndpoints, err := e.client.Endpoints(service.Namespace).Get(service.Name)
if err != nil {
if errors.IsNotFound(err) {
currentEndpoints = &api.Endpoints{
ObjectMeta: api.ObjectMeta{
Name: service.Name,
Labels: service.Labels,
},
}
} else {
glog.Errorf("Error getting endpoints: %v", err)
e.queue.Add(key) // Retry
return
}
}
serializedPodHostNames := ""
if len(podHostNames) > 0 {
b, err := json.Marshal(podHostNames)
if err != nil {
glog.Errorf("Error updating endpoints. Marshalling of hostnames failed.: %v", err)
e.queue.Add(key) // Retry
return
}
serializedPodHostNames = string(b)
}
newAnnotations := make(map[string]string)
newAnnotations[endpoints.PodHostnamesAnnotation] = serializedPodHostNames
if reflect.DeepEqual(currentEndpoints.Subsets, subsets) &&
reflect.DeepEqual(currentEndpoints.Labels, service.Labels) {
glog.V(5).Infof("endpoints are equal for %s/%s, skipping update", service.Namespace, service.Name)
return
}
newEndpoints := currentEndpoints
newEndpoints.Subsets = subsets
newEndpoints.Labels = service.Labels
if newEndpoints.Annotations == nil {
newEndpoints.Annotations = make(map[string]string)
}
if len(serializedPodHostNames) == 0 {
delete(newEndpoints.Annotations, endpoints.PodHostnamesAnnotation)
} else {
newEndpoints.Annotations[endpoints.PodHostnamesAnnotation] = serializedPodHostNames
}
if len(currentEndpoints.ResourceVersion) == 0 {
// No previous endpoints, create them
_, err = e.client.Endpoints(service.Namespace).Create(newEndpoints)
} else {
// Pre-existing
_, err = e.client.Endpoints(service.Namespace).Update(newEndpoints)
}
if err != nil {
glog.Errorf("Error updating endpoints: %v", err)
e.queue.Add(key) // Retry
}
}
func (e *EndpointController) syncService(key string) error {
startTime := time.Now()
defer func() {
glog.V(4).Infof("Finished syncing service %q endpoints. (%v)", key, time.Now().Sub(startTime))
}()
obj, exists, err := e.serviceStore.Indexer.GetByKey(key)
if err != nil || !exists {
// Delete the corresponding endpoint, as the service has been deleted.
// TODO: Please note that this will delete an endpoint when a
// service is deleted. However, if we're down at the time when
// the service is deleted, we will miss that deletion, so this
// doesn't completely solve the problem. See #6877.
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
utilruntime.HandleError(fmt.Errorf("Need to delete endpoint with key %q, but couldn't understand the key: %v", key, err))
// Don't retry, as the key isn't going to magically become understandable.
return nil
}
err = e.client.Core().Endpoints(namespace).Delete(name, nil)
if err != nil && !errors.IsNotFound(err) {
return err
}
return nil
}
service := obj.(*api.Service)
if service.Spec.Selector == nil {
// services without a selector receive no endpoints from this controller;
// these services will receive the endpoints that are created out-of-band via the REST API.
return nil
}
glog.V(5).Infof("About to update endpoints for service %q", key)
pods, err := e.podStore.Pods(service.Namespace).List(labels.Set(service.Spec.Selector).AsSelectorPreValidated())
if err != nil {
// Since we're getting stuff from a local cache, it is
// basically impossible to get this error.
return err
}
subsets := []api.EndpointSubset{}
podHostNames := map[string]endpoints.HostRecord{}
var tolerateUnreadyEndpoints bool
if v, ok := service.Annotations[TolerateUnreadyEndpointsAnnotation]; ok {
b, err := strconv.ParseBool(v)
if err == nil {
tolerateUnreadyEndpoints = b
} else {
utilruntime.HandleError(fmt.Errorf("Failed to parse annotation %v: %v", TolerateUnreadyEndpointsAnnotation, err))
}
}
readyEps := 0
notReadyEps := 0
for i := range pods {
// TODO: Do we need to copy here?
pod := &(*pods[i])
for i := range service.Spec.Ports {
servicePort := &service.Spec.Ports[i]
portName := servicePort.Name
portProto := servicePort.Protocol
portNum, err := podutil.FindPort(pod, servicePort)
if err != nil {
glog.V(4).Infof("Failed to find port for service %s/%s: %v", service.Namespace, service.Name, err)
continue
}
if len(pod.Status.PodIP) == 0 {
glog.V(5).Infof("Failed to find an IP for pod %s/%s", pod.Namespace, pod.Name)
continue
}
if pod.DeletionTimestamp != nil {
glog.V(5).Infof("Pod is being deleted %s/%s", pod.Namespace, pod.Name)
continue
}
epp := api.EndpointPort{Name: portName, Port: int32(portNum), Protocol: portProto}
epa := api.EndpointAddress{
IP: pod.Status.PodIP,
NodeName: &pod.Spec.NodeName,
TargetRef: &api.ObjectReference{
Kind: "Pod",
Namespace: pod.ObjectMeta.Namespace,
Name: pod.ObjectMeta.Name,
UID: pod.ObjectMeta.UID,
ResourceVersion: pod.ObjectMeta.ResourceVersion,
}}
hostname := getHostname(pod)
if len(hostname) > 0 &&
getSubdomain(pod) == service.Name &&
service.Namespace == pod.Namespace {
hostRecord := endpoints.HostRecord{
HostName: hostname,
}
// TODO: stop populating podHostNames annotation in 1.4
podHostNames[string(pod.Status.PodIP)] = hostRecord
epa.Hostname = hostname
}
if tolerateUnreadyEndpoints || api.IsPodReady(pod) {
subsets = append(subsets, api.EndpointSubset{
Addresses: []api.EndpointAddress{epa},
Ports: []api.EndpointPort{epp},
})
readyEps++
} else {
glog.V(5).Infof("Pod is out of service: %v/%v", pod.Namespace, pod.Name)
subsets = append(subsets, api.EndpointSubset{
NotReadyAddresses: []api.EndpointAddress{epa},
Ports: []api.EndpointPort{epp},
})
notReadyEps++
}
}
}
subsets = endpoints.RepackSubsets(subsets)
// See if there's actually an update here.
currentEndpoints, err := e.client.Core().Endpoints(service.Namespace).Get(service.Name)
if err != nil {
if errors.IsNotFound(err) {
currentEndpoints = &api.Endpoints{
ObjectMeta: api.ObjectMeta{
Name: service.Name,
Labels: service.Labels,
},
}
} else {
return err
}
}
serializedPodHostNames := ""
if len(podHostNames) > 0 {
b, err := json.Marshal(podHostNames)
if err != nil {
return err
}
serializedPodHostNames = string(b)
}
newAnnotations := make(map[string]string)
newAnnotations[endpoints.PodHostnamesAnnotation] = serializedPodHostNames
if reflect.DeepEqual(currentEndpoints.Subsets, subsets) &&
reflect.DeepEqual(currentEndpoints.Labels, service.Labels) {
glog.V(5).Infof("endpoints are equal for %s/%s, skipping update", service.Namespace, service.Name)
return nil
}
newEndpoints := currentEndpoints
newEndpoints.Subsets = subsets
newEndpoints.Labels = service.Labels
if newEndpoints.Annotations == nil {
newEndpoints.Annotations = make(map[string]string)
}
if len(serializedPodHostNames) == 0 {
delete(newEndpoints.Annotations, endpoints.PodHostnamesAnnotation)
} else {
newEndpoints.Annotations[endpoints.PodHostnamesAnnotation] = serializedPodHostNames
}
glog.V(4).Infof("Update endpoints for %v/%v, ready: %d not ready: %d", service.Namespace, service.Name, readyEps, notReadyEps)
createEndpoints := len(currentEndpoints.ResourceVersion) == 0
if createEndpoints {
// No previous endpoints, create them
_, err = e.client.Core().Endpoints(service.Namespace).Create(newEndpoints)
} else {
// Pre-existing
_, err = e.client.Core().Endpoints(service.Namespace).Update(newEndpoints)
}
if err != nil {
if createEndpoints && errors.IsForbidden(err) {
// A request is forbidden primarily for two reasons:
// 1. namespace is terminating, endpoint creation is not allowed by default.
// 2. policy is misconfigured, in which case no service would function anywhere.
// Given the frequency of 1, we log at a lower level.
glog.V(5).Infof("Forbidden from creating endpoints: %v", err)
}
return err
}
return nil
}