// TODO: Move this back to scheduler as a helper function that takes a Store,
// rather than a method of StoreToServiceLister.
func (s *StoreToServiceLister) GetPodServices(pod *api.Pod) (services []api.Service, err error) {
var selector labels.Selector
var service api.Service
for _, m := range s.Store.List() {
service = *m.(*api.Service)
// consider only services that are in the same namespace as the pod
if service.Namespace != pod.Namespace {
continue
}
if service.Spec.Selector == nil {
// services with nil selectors match nothing, not everything.
continue
}
selector = labels.Set(service.Spec.Selector).AsSelector()
if selector.Matches(labels.Set(pod.Labels)) {
services = append(services, service)
}
}
if len(services) == 0 {
err = fmt.Errorf("Could not find service for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
// WatchControllers begins watching for new, changed, or deleted controllers.
func (r *Registry) WatchControllers(ctx api.Context, label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
if !field.Empty() {
return nil, fmt.Errorf("field selectors are not supported on replication controllers")
}
version, err := tools.ParseWatchResourceVersion(resourceVersion, "replicationControllers")
if err != nil {
return nil, err
}
key := makeControllerListKey(ctx)
return r.WatchList(key, version, func(obj runtime.Object) bool {
controller, ok := obj.(*api.ReplicationController)
if !ok {
// Must be an error: return true to propagate to upper level.
return true
}
match := label.Matches(labels.Set(controller.Labels))
if match {
pods, err := r.pods.ListPods(ctx, labels.Set(controller.Spec.Selector).AsSelector())
if err != nil {
glog.Warningf("Error listing pods: %v", err)
// No object that's useable so drop it on the floor
return false
}
if pods == nil {
glog.Warningf("Pods list is nil. This should never happen...")
// No object that's useable so drop it on the floor
return false
}
controller.Status.Replicas = len(pods.Items)
}
return match
})
}
// GetPodControllers returns a list of controllers managing a pod. Returns an error only if no matching controllers are found.
func (s *StoreToControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error) {
var selector labels.Selector
var rc api.ReplicationController
if len(pod.Labels) == 0 {
err = fmt.Errorf("No controllers found for pod %v because it has no labels", pod.Name)
return
}
for _, m := range s.Store.List() {
rc = *m.(*api.ReplicationController)
if rc.Namespace != pod.Namespace {
continue
}
labelSet := labels.Set(rc.Spec.Selector)
selector = labels.Set(rc.Spec.Selector).AsSelector()
// If an rc with a nil or empty selector creeps in, it should match nothing, not everything.
if labelSet.AsSelector().Empty() || !selector.Matches(labels.Set(pod.Labels)) {
continue
}
controllers = append(controllers, rc)
}
if len(controllers) == 0 {
err = fmt.Errorf("Could not find controllers for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
func MappingTypeForPod(pod *api.Pod) HostPortMappingType {
filter := map[string]string{
PortMappingLabelKey: string(HostPortMappingFixed),
}
selector := labels.Set(filter).AsSelector()
if selector.Matches(labels.Set(pod.Labels)) {
return HostPortMappingFixed
}
return HostPortMappingWildcard
}
func verifyExpectedRcsExistAndGetExpectedPods(c *client.Client) ([]string, error) {
expectedPods := []string{}
// Iterate over the labels that identify the replication controllers that we
// want to check. The rcLabels contains the value values for the k8s-app key
// that identify the replication controllers that we want to check. Using a label
// rather than an explicit name is preferred because the names will typically have
// a version suffix e.g. heapster-monitoring-v1 and this will change after a rolling
// update e.g. to heapster-monitoring-v2. By using a label query we can check for the
// situaiton when a heapster-monitoring-v1 and heapster-monitoring-v2 replication controller
// is running (which would be an error except during a rolling update).
for _, rcLabel := range rcLabels {
rcList, err := c.ReplicationControllers(api.NamespaceDefault).List(labels.Set{"k8s-app": rcLabel}.AsSelector())
if err != nil {
return nil, err
}
if len(rcList.Items) != 1 {
return nil, fmt.Errorf("expected to find one replica for RC with label %s but got %d",
rcLabel, len(rcList.Items))
}
for _, rc := range rcList.Items {
podList, err := c.Pods(api.NamespaceDefault).List(labels.Set(rc.Spec.Selector).AsSelector(), fields.Everything())
if err != nil {
return nil, err
}
for _, pod := range podList.Items {
expectedPods = append(expectedPods, string(pod.UID))
}
}
}
return expectedPods, nil
}
// TODO Move to labels package.
func formatLabels(labelMap map[string]string) string {
l := labels.Set(labelMap).String()
if l == "" {
l = "<none>"
}
return l
}
func (d *PodDescriber) Describe(namespace, name string) (string, error) {
rc := d.ReplicationControllers(namespace)
pc := d.Pods(namespace)
pod, err := pc.Get(name)
if err != nil {
eventsInterface := d.Events(namespace)
events, err2 := eventsInterface.List(
labels.Everything(),
eventsInterface.GetFieldSelector(&name, &namespace, nil, nil))
if err2 == nil && len(events.Items) > 0 {
return tabbedString(func(out io.Writer) error {
fmt.Fprintf(out, "Pod '%v': error '%v', but found events.\n", name, err)
DescribeEvents(events, out)
return nil
})
}
return "", err
}
var events *api.EventList
if ref, err := api.GetReference(pod); err != nil {
glog.Errorf("Unable to construct reference to '%#v': %v", pod, err)
} else {
ref.Kind = ""
events, _ = d.Events(namespace).Search(ref)
}
rcs, err := getReplicationControllersForLabels(rc, labels.Set(pod.Labels))
if err != nil {
return "", err
}
return describePod(pod, rcs, events)
}
// CalculateNodeLabelPriority checks whether a particular label exists on a minion or not, regardless of its value.
// If presence is true, prioritizes minions that have the specified label, regardless of value.
// If presence is false, prioritizes minions that do not have the specified label.
func (n *NodeLabelPrioritizer) CalculateNodeLabelPriority(pod *api.Pod, podLister algorithm.PodLister, minionLister algorithm.MinionLister) (algorithm.HostPriorityList, error) {
var score int
minions, err := minionLister.List()
if err != nil {
return nil, err
}
labeledMinions := map[string]bool{}
for _, minion := range minions.Items {
exists := labels.Set(minion.Labels).Has(n.label)
labeledMinions[minion.Name] = (exists && n.presence) || (!exists && !n.presence)
}
result := []algorithm.HostPriority{}
//score int - scale of 0-10
// 0 being the lowest priority and 10 being the highest
for minionName, success := range labeledMinions {
if success {
score = 10
} else {
score = 0
}
result = append(result, algorithm.HostPriority{Host: minionName, Score: score})
}
return result, nil
}
func PodMatchesNodeLabels(pod *api.Pod, node *api.Node) bool {
if len(pod.Spec.NodeSelector) == 0 {
return true
}
selector := labels.SelectorFromSet(pod.Spec.NodeSelector)
return selector.Matches(labels.Set(node.Labels))
}
// List returns []*api.Pod matching a query.
func (f FakePodLister) List(s labels.Selector) (selected []*api.Pod, err error) {
for _, pod := range f {
if s.Matches(labels.Set(pod.Labels)) {
selected = append(selected, pod)
}
}
return selected, nil
}
// MatchPodTemplate returns a generic matcher for a given label and field selector.
func MatchPodTemplate(label labels.Selector, field fields.Selector) generic.Matcher {
return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
podObj, ok := obj.(*api.PodTemplate)
if !ok {
return false, fmt.Errorf("not a pod template")
}
return label.Matches(labels.Set(podObj.Labels)), nil
})
}
// Matcher returns a generic matcher for a given label and field selector.
func Matcher(label labels.Selector, field fields.Selector) generic.Matcher {
return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
sa, ok := obj.(*api.Secret)
if !ok {
return false, fmt.Errorf("not a secret")
}
fields := SelectableFields(sa)
return label.Matches(labels.Set(sa.Labels)) && field.Matches(fields), nil
})
}
// MatchPersistentVolume returns a generic matcher for a given label and field selector.
func MatchPersistentVolumes(label labels.Selector, field fields.Selector) generic.Matcher {
return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
persistentvolumeObj, ok := obj.(*api.PersistentVolume)
if !ok {
return false, fmt.Errorf("not a persistentvolume")
}
fields := PersistentVolumeToSelectableFields(persistentvolumeObj)
return label.Matches(labels.Set(persistentvolumeObj.Labels)) && field.Matches(fields), nil
})
}
// MatchNamespace returns a generic matcher for a given label and field selector.
func MatchNamespace(label labels.Selector, field fields.Selector) generic.Matcher {
return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
namespaceObj, ok := obj.(*api.Namespace)
if !ok {
return false, fmt.Errorf("not a namespace")
}
fields := NamespaceToSelectableFields(namespaceObj)
return label.Matches(labels.Set(namespaceObj.Labels)) && field.Matches(fields), nil
})
}
// GetPodServices gets the services that have the selector that match the labels on the given pod
func (f FakeServiceLister) GetPodServices(pod *api.Pod) (services []api.Service, err error) {
var selector labels.Selector
for _, service := range f {
// consider only services that are in the same namespace as the pod
if service.Namespace != pod.Namespace {
continue
}
selector = labels.Set(service.Spec.Selector).AsSelector()
if selector.Matches(labels.Set(pod.Labels)) {
services = append(services, service)
}
}
if len(services) == 0 {
err = fmt.Errorf("Could not find service for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
// MatchResourceQuota returns a generic matcher for a given label and field selector.
func MatchResourceQuota(label labels.Selector, field fields.Selector) generic.Matcher {
return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
resourcequotaObj, ok := obj.(*api.ResourceQuota)
if !ok {
return false, fmt.Errorf("not a resourcequota")
}
fields := ResourceQuotaToSelectableFields(resourcequotaObj)
return label.Matches(labels.Set(resourcequotaObj.Labels)) && field.Matches(fields), nil
})
}
// Please note that selector is filtering among the pods that have gotten into
// the store; there may have been some filtering that already happened before
// that.
func (s storePodsNamespacer) List(selector labels.Selector) (pods api.PodList, err error) {
list := api.PodList{}
for _, m := range s.store.List() {
pod := m.(*api.Pod)
if s.namespace == api.NamespaceAll || s.namespace == pod.Namespace {
if selector.Matches(labels.Set(pod.Labels)) {
list.Items = append(list.Items, *pod)
}
}
}
return list, nil
}
// syncReplicationController will sync the rc with the given key if it has had its expectations fulfilled, meaning
// it did not expect to see any more of its pods created or deleted. This function is not meant to be invoked
// concurrently with the same key.
func (rm *ReplicationManager) syncReplicationController(key string) error {
startTime := time.Now()
defer func() {
glog.V(4).Infof("Finished syncing controller %q (%v)", key, time.Now().Sub(startTime))
}()
obj, exists, err := rm.controllerStore.Store.GetByKey(key)
if !exists {
glog.Infof("Replication Controller has been deleted %v", key)
rm.expectations.DeleteExpectations(key)
return nil
}
if err != nil {
glog.Infof("Unable to retrieve rc %v from store: %v", key, err)
rm.queue.Add(key)
return err
}
controller := *obj.(*api.ReplicationController)
if !rm.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 rc %v", controller.Name)
rm.enqueueController(&controller)
return nil
}
// Check the expectations of the rc before counting active pods, otherwise a new pod can sneak in
// and update the expectations after we've retrieved active pods from the store. If a new pod enters
// the store after we've checked the expectation, the rc sync is just deferred till the next relist.
rcNeedsSync := rm.expectations.SatisfiedExpectations(&controller)
podList, err := rm.podStore.Pods(controller.Namespace).List(labels.Set(controller.Spec.Selector).AsSelector())
if err != nil {
glog.Errorf("Error getting pods for rc %q: %v", key, err)
rm.queue.Add(key)
return err
}
// TODO: Do this in a single pass, or use an index.
filteredPods := filterActivePods(podList.Items)
if rcNeedsSync {
rm.manageReplicas(filteredPods, &controller)
}
// Always updates status as pods come up or die.
if err := updateReplicaCount(rm.qingClient.ReplicationControllers(controller.Namespace), controller, len(filteredPods)); err != nil {
// Multiple things could lead to this update failing. Requeuing the controller ensures
// we retry with some fairness.
glog.V(2).Infof("Failed to update replica count for controller %v, requeuing", controller.Name)
rm.enqueueController(&controller)
}
return nil
}
// MatchNode returns a generic matcher for a given label and field selector.
func MatchNode(label labels.Selector, field fields.Selector) generic.Matcher {
return &generic.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: func(obj runtime.Object) (labels.Set, fields.Set, error) {
nodeObj, ok := obj.(*api.Node)
if !ok {
return nil, nil, fmt.Errorf("not a node")
}
return labels.Set(nodeObj.ObjectMeta.Labels), NodeToSelectableFields(nodeObj), nil
},
}
}
// Scales RC to a random size within [0.5*size, 1.5*size] and lists all the pods afterwards.
// Scaling happens always based on original size, not the current size.
func scaleRC(wg *sync.WaitGroup, config *RCConfig) {
defer GinkgoRecover()
defer wg.Done()
resizingTime := 3 * time.Minute
sleepUpTo(resizingTime)
newSize := uint(rand.Intn(config.Replicas) + config.Replicas/2)
expectNoError(ScaleRC(config.Client, config.Namespace, config.Name, newSize),
fmt.Sprintf("scaling rc %s for the first time", config.Name))
selector := labels.SelectorFromSet(labels.Set(map[string]string{"name": config.Name}))
_, err := config.Client.Pods(config.Namespace).List(selector, fields.Everything())
expectNoError(err, fmt.Sprintf("listing pods from rc %v", config.Name))
}
// MatchController is the filter used by the generic etcd backend to route
// watch events from etcd to clients of the apiserver only interested in specific
// labels/fields.
func MatchController(label labels.Selector, field fields.Selector) generic.Matcher {
return &generic.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: func(obj runtime.Object) (labels.Set, fields.Set, error) {
rc, ok := obj.(*api.ReplicationController)
if !ok {
return nil, nil, fmt.Errorf("Given object is not a replication controller.")
}
return labels.Set(rc.ObjectMeta.Labels), ControllerToSelectableFields(rc), nil
},
}
}
// Please note that selector is filtering among the pods that have gotten into
// the store; there may have been some filtering that already happened before
// that.
//
// TODO: converge on the interface in pkg/client.
func (s *StoreToPodLister) List(selector labels.Selector) (pods []*api.Pod, err error) {
// TODO: it'd be great to just call
// s.Pods(api.NamespaceAll).List(selector), however then we'd have to
// remake the list.Items as a []*api.Pod. So leave this separate for
// now.
for _, m := range s.Store.List() {
pod := m.(*api.Pod)
if selector.Matches(labels.Set(pod.Labels)) {
pods = append(pods, pod)
}
}
return pods, nil
}
// MatchPod returns a generic matcher for a given label and field selector.
func MatchPod(label labels.Selector, field fields.Selector) generic.Matcher {
return &generic.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: func(obj runtime.Object) (labels.Set, fields.Set, error) {
pod, ok := obj.(*api.Pod)
if !ok {
return nil, nil, fmt.Errorf("not a pod")
}
return labels.Set(pod.ObjectMeta.Labels), PodToSelectableFields(pod), nil
},
}
}
func (r RealPodControl) createReplica(namespace string, controller *api.ReplicationController) error {
desiredLabels := make(labels.Set)
for k, v := range controller.Spec.Template.Labels {
desiredLabels[k] = v
}
desiredAnnotations := make(labels.Set)
for k, v := range controller.Spec.Template.Annotations {
desiredAnnotations[k] = v
}
createdByRef, err := api.GetReference(controller)
if err != nil {
return fmt.Errorf("unable to get controller reference: %v", err)
}
createdByRefJson, err := latest.Codec.Encode(&api.SerializedReference{
Reference: *createdByRef,
})
if err != nil {
return fmt.Errorf("unable to serialize controller reference: %v", err)
}
desiredAnnotations[CreatedByAnnotation] = string(createdByRefJson)
// use the dash (if the name isn't too long) to make the pod name a bit prettier
prefix := fmt.Sprintf("%s-", controller.Name)
if ok, _ := validation.ValidatePodName(prefix, true); !ok {
prefix = controller.Name
}
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Labels: desiredLabels,
Annotations: desiredAnnotations,
GenerateName: prefix,
},
}
if err := api.Scheme.Convert(&controller.Spec.Template.Spec, &pod.Spec); err != nil {
return fmt.Errorf("unable to convert pod template: %v", err)
}
if labels.Set(pod.Labels).AsSelector().Empty() {
return fmt.Errorf("unable to create pod replica, no labels")
}
if newPod, err := r.qingClient.Pods(namespace).Create(pod); err != nil {
r.recorder.Eventf(controller, "failedCreate", "Error creating: %v", err)
return fmt.Errorf("unable to create pod replica: %v", err)
} else {
glog.V(4).Infof("Controller %v created pod %v", controller.Name, newPod.Name)
r.recorder.Eventf(controller, "successfulCreate", "Created pod: %v", newPod.Name)
}
return nil
}
func (rs *REST) List(ctx api.Context, label labels.Selector, field fields.Selector) (runtime.Object, error) {
list, err := rs.registry.ListServices(ctx)
if err != nil {
return nil, err
}
var filtered []api.Service
for _, service := range list.Items {
if label.Matches(labels.Set(service.Labels)) {
filtered = append(filtered, service)
}
}
list.Items = filtered
return list, err
}
func TestEtcdListControllersLabelsMatch(t *testing.T) {
storage, fakeClient := newStorage(t)
ctx := api.NewDefaultContext()
key := makeControllerListKey(ctx)
key = etcdtest.AddPrefix(key)
controller := validController
controller.Labels = map[string]string{"k": "v"}
controller.Name = "bar"
fakeClient.Data[key] = tools.EtcdResponseWithError{
R: &etcd.Response{
Node: &etcd.Node{
Nodes: []*etcd.Node{
{
Value: runtime.EncodeOrDie(latest.Codec, &validController),
},
{
Value: runtime.EncodeOrDie(latest.Codec, &controller),
},
},
},
},
E: nil,
}
testLabels := labels.SelectorFromSet(labels.Set(controller.Labels))
objList, err := storage.List(ctx, testLabels, fields.Everything())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
controllers, _ := objList.(*api.ReplicationControllerList)
if len(controllers.Items) != 1 || controllers.Items[0].Name != controller.Name ||
!testLabels.Matches(labels.Set(controllers.Items[0].Labels)) {
t.Errorf("Unexpected controller list: %#v for query with labels %#v",
controllers, testLabels)
}
}
// CheckNodeLabelPresence checks whether all of the specified labels exists on a minion or not, regardless of their value
// If "presence" is false, then returns false if any of the requested labels matches any of the minion's labels,
// otherwise returns true.
// If "presence" is true, then returns false if any of the requested labels does not match any of the minion's labels,
// otherwise returns true.
//
// Consider the cases where the minions are placed in regions/zones/racks and these are identified by labels
// In some cases, it is required that only minions that are part of ANY of the defined regions/zones/racks be selected
//
// Alternately, eliminating minions that have a certain label, regardless of value, is also useful
// A minion may have a label with "retiring" as key and the date as the value
// and it may be desirable to avoid scheduling new pods on this minion
func (n *NodeLabelChecker) CheckNodeLabelPresence(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error) {
var exists bool
minion, err := n.info.GetNodeInfo(node)
if err != nil {
return false, err
}
minionLabels := labels.Set(minion.Labels)
for _, label := range n.labels {
exists = minionLabels.Has(label)
if (exists && !n.presence) || (!exists && n.presence) {
return false, nil
}
}
return true, nil
}
func runReplicationControllerTest(c *client.Client) {
clientAPIVersion := c.APIVersion()
data, err := ioutil.ReadFile("cmd/integration/" + clientAPIVersion + "-controller.json")
if err != nil {
glog.Fatalf("Unexpected error: %v", err)
}
var controller api.ReplicationController
if err := api.Scheme.DecodeInto(data, &controller); err != nil {
glog.Fatalf("Unexpected error: %v", err)
}
glog.Infof("Creating replication controllers")
updated, err := c.ReplicationControllers("test").Create(&controller)
if err != nil {
glog.Fatalf("Unexpected error: %v", err)
}
glog.Infof("Done creating replication controllers")
// In practice the controller doesn't need 60s to create a handful of pods, but network latencies on CI
// systems have been observed to vary unpredictably, so give the controller enough time to create pods.
// Our e2e scalability tests will catch controllers that are *actually* slow.
if err := wait.Poll(time.Second, time.Second*60, client.ControllerHasDesiredReplicas(c, updated)); err != nil {
glog.Fatalf("FAILED: pods never created %v", err)
}
// Poll till we can retrieve the status of all pods matching the given label selector from their minions.
// This involves 3 operations:
// - The scheduler must assign all pods to a minion
// - The assignment must reflect in a `List` operation against the apiserver, for labels matching the selector
// - We need to be able to query the qinglet on that minion for information about the pod
if err := wait.Poll(
time.Second, time.Second*30, podsOnMinions(c, "test", labels.Set(updated.Spec.Selector).AsSelector())); err != nil {
glog.Fatalf("FAILED: pods never started running %v", err)
}
glog.Infof("Pods created")
}
// CheckServiceAffinity ensures that only the minions that match the specified labels are considered for scheduling.
// The set of labels to be considered are provided to the struct (ServiceAffinity).
// The pod is checked for the labels and any missing labels are then checked in the minion
// that hosts the service pods (peers) for the given pod.
//
// We add an implicit selector requiring some particular value V for label L to a pod, if:
// - L is listed in the ServiceAffinity object that is passed into the function
// - the pod does not have any NodeSelector for L
// - some other pod from the same service is already scheduled onto a minion that has value V for label L
func (s *ServiceAffinity) CheckServiceAffinity(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error) {
var affinitySelector labels.Selector
// check if the pod being scheduled has the affinity labels specified in its NodeSelector
affinityLabels := map[string]string{}
nodeSelector := labels.Set(pod.Spec.NodeSelector)
labelsExist := true
for _, l := range s.labels {
if nodeSelector.Has(l) {
affinityLabels[l] = nodeSelector.Get(l)
} else {
// the current pod does not specify all the labels, look in the existing service pods
labelsExist = false
}
}
// skip looking at other pods in the service if the current pod defines all the required affinity labels
if !labelsExist {
services, err := s.serviceLister.GetPodServices(pod)
if err == nil {
// just use the first service and get the other pods within the service
// TODO: a separate predicate can be created that tries to handle all services for the pod
selector := labels.SelectorFromSet(services[0].Spec.Selector)
servicePods, err := s.podLister.List(selector)
if err != nil {
return false, err
}
// consider only the pods that belong to the same namespace
nsServicePods := []*api.Pod{}
for _, nsPod := range servicePods {
if nsPod.Namespace == pod.Namespace {
nsServicePods = append(nsServicePods, nsPod)
}
}
if len(nsServicePods) > 0 {
// consider any service pod and fetch the minion its hosted on
otherMinion, err := s.nodeInfo.GetNodeInfo(nsServicePods[0].Spec.NodeName)
if err != nil {
return false, err
}
for _, l := range s.labels {
// If the pod being scheduled has the label value specified, do not override it
if _, exists := affinityLabels[l]; exists {
continue
}
if labels.Set(otherMinion.Labels).Has(l) {
affinityLabels[l] = labels.Set(otherMinion.Labels).Get(l)
}
}
}
}
}
// if there are no existing pods in the service, consider all minions
if len(affinityLabels) == 0 {
affinitySelector = labels.Everything()
} else {
affinitySelector = labels.Set(affinityLabels).AsSelector()
}
minion, err := s.nodeInfo.GetNodeInfo(node)
if err != nil {
return false, err
}
// check if the minion matches the selector
return affinitySelector.Matches(labels.Set(minion.Labels)), nil
}
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))
}()
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)
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{}
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 := 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
}
// HACK(jdef): use HostIP instead of pod.CurrentState.PodIP for generic mesos compat
if len(pod.Status.HostIP) == 0 {
glog.V(4).Infof("Failed to find a host IP for pod %s/%s", pod.Namespace, pod.Name)
continue
}
if !api.IsPodReady(pod) {
glog.V(5).Infof("Pod is out of service: %v/%v", pod.Namespace, pod.Name)
continue
}
// HACK(jdef): use HostIP instead of pod.CurrentState.PodIP for generic mesos compat
epp := api.EndpointPort{Name: portName, Port: portNum, Protocol: portProto}
epa := api.EndpointAddress{IP: pod.Status.HostIP, TargetRef: &api.ObjectReference{
Kind: "Pod",
Namespace: pod.ObjectMeta.Namespace,
Name: pod.ObjectMeta.Name,
UID: pod.ObjectMeta.UID,
ResourceVersion: pod.ObjectMeta.ResourceVersion,
}}
subsets = append(subsets, api.EndpointSubset{Addresses: []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
}
}
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 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
}
}