// GetPodControllers returns a list of replication controllers managing a pod. Returns an error only if no matching controllers are found.
func (s *StoreToReplicationControllerLister) 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
}
key := &api.ReplicationController{ObjectMeta: api.ObjectMeta{Namespace: pod.Namespace}}
items, err := s.Indexer.Index(NamespaceIndex, key)
if err != nil {
return
}
for _, m := range items {
rc = *m.(*api.ReplicationController)
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 controller for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
// 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) (api.PodList, error) {
pods := api.PodList{}
if s.namespace == api.NamespaceAll {
for _, m := range s.indexer.List() {
pod := m.(*api.Pod)
if selector.Matches(labels.Set(pod.Labels)) {
pods.Items = append(pods.Items, *pod)
}
}
return pods, nil
}
key := &api.Pod{ObjectMeta: api.ObjectMeta{Namespace: s.namespace}}
items, err := s.indexer.Index(NamespaceIndex, key)
if err != nil {
// Ignore error; do slow search without index.
glog.Warningf("can not retrieve list of objects using index : %v", err)
for _, m := range s.indexer.List() {
pod := m.(*api.Pod)
if s.namespace == pod.Namespace && selector.Matches(labels.Set(pod.Labels)) {
pods.Items = append(pods.Items, *pod)
}
}
return pods, nil
}
for _, m := range items {
pod := m.(*api.Pod)
if selector.Matches(labels.Set(pod.Labels)) {
pods.Items = append(pods.Items, *pod)
}
}
return pods, nil
}
func (s storeReplicationControllersNamespacer) List(selector labels.Selector) ([]api.ReplicationController, error) {
controllers := []api.ReplicationController{}
if s.namespace == api.NamespaceAll {
for _, m := range s.indexer.List() {
rc := *(m.(*api.ReplicationController))
if selector.Matches(labels.Set(rc.Labels)) {
controllers = append(controllers, rc)
}
}
return controllers, nil
}
key := &api.ReplicationController{ObjectMeta: api.ObjectMeta{Namespace: s.namespace}}
items, err := s.indexer.Index(NamespaceIndex, key)
if err != nil {
// Ignore error; do slow search without index.
glog.Warningf("can not retrieve list of objects using index : %v", err)
for _, m := range s.indexer.List() {
rc := *(m.(*api.ReplicationController))
if s.namespace == rc.Namespace && selector.Matches(labels.Set(rc.Labels)) {
controllers = append(controllers, rc)
}
}
return controllers, nil
}
for _, m := range items {
rc := *(m.(*api.ReplicationController))
if selector.Matches(labels.Set(rc.Labels)) {
controllers = append(controllers, rc)
}
}
return controllers, nil
}
// 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
}
func (dsc *DaemonSetsController) nodeShouldRunDaemonPod(node *api.Node, ds *extensions.DaemonSet) bool {
// Check if the node satisfies the daemon set's node selector.
nodeSelector := labels.Set(ds.Spec.Template.Spec.NodeSelector).AsSelector()
if !nodeSelector.Matches(labels.Set(node.Labels)) {
return false
}
// If the daemon set specifies a node name, check that it matches with node.Name.
if !(ds.Spec.Template.Spec.NodeName == "" || ds.Spec.Template.Spec.NodeName == node.Name) {
return false
}
for _, c := range node.Status.Conditions {
if c.Type == api.NodeOutOfDisk && c.Status == api.ConditionTrue {
return false
}
}
newPod := &api.Pod{Spec: ds.Spec.Template.Spec}
newPod.Spec.NodeName = node.Name
pods := []*api.Pod{newPod}
for _, m := range dsc.podStore.Indexer.List() {
pod := m.(*api.Pod)
if pod.Spec.NodeName != node.Name {
continue
}
if pod.Status.Phase == api.PodSucceeded || pod.Status.Phase == api.PodFailed {
continue
}
// ignore pods that belong to the daemonset when taking into account wheter
// a daemonset should bind to a node.
if pds := dsc.getPodDaemonSet(pod); pds != nil && ds.Name == pds.Name {
continue
}
pods = append(pods, pod)
}
_, notFittingCPU, notFittingMemory, notFittingNvidiaGPU := predicates.CheckPodsExceedingFreeResources(pods, node.Status.Allocatable)
if len(notFittingCPU)+len(notFittingMemory)+len(notFittingNvidiaGPU) != 0 {
dsc.eventRecorder.Eventf(ds, api.EventTypeNormal, "FailedPlacement", "failed to place pod on %q: insufficent free resources", node.ObjectMeta.Name)
return false
}
ports := sets.String{}
for _, pod := range pods {
if errs := validation.AccumulateUniqueHostPorts(pod.Spec.Containers, &ports, field.NewPath("spec", "containers")); len(errs) > 0 {
dsc.eventRecorder.Eventf(ds, api.EventTypeNormal, "FailedPlacement", "failed to place pod on %q: host port conflict", node.ObjectMeta.Name)
return false
}
}
return true
}
// getOverlappingControllers finds rcs that this controller overlaps, as well as rcs overlapping this controller.
func getOverlappingControllers(c client.ReplicationControllerInterface, rc *api.ReplicationController) ([]api.ReplicationController, error) {
rcs, err := c.List(api.ListOptions{})
if err != nil {
return nil, fmt.Errorf("error getting replication controllers: %v", err)
}
var matchingRCs []api.ReplicationController
rcLabels := labels.Set(rc.Spec.Selector)
for _, controller := range rcs.Items {
newRCLabels := labels.Set(controller.Spec.Selector)
if labels.SelectorFromSet(newRCLabels).Matches(rcLabels) || labels.SelectorFromSet(rcLabels).Matches(newRCLabels) {
matchingRCs = append(matchingRCs, controller)
}
}
return matchingRCs, nil
}
// readyPods returns the old and new ready counts for their pods.
// If a pod is observed as being ready, it's considered ready even
// if it later becomes notReady.
func (r *RollingUpdater) readyPods(oldRc, newRc *api.ReplicationController) (int32, int32, error) {
controllers := []*api.ReplicationController{oldRc, newRc}
oldReady := int32(0)
newReady := int32(0)
for i := range controllers {
controller := controllers[i]
selector := labels.Set(controller.Spec.Selector).AsSelector()
options := api.ListOptions{LabelSelector: selector}
pods, err := r.c.Pods(controller.Namespace).List(options)
if err != nil {
return 0, 0, err
}
for _, pod := range pods.Items {
if api.IsPodReady(&pod) {
switch controller.Name {
case oldRc.Name:
oldReady++
case newRc.Name:
newReady++
}
}
}
}
return oldReady, newReady, nil
}
// SelectableFields returns a label set that can be used for filter selection
func SelectableFields(obj *api.Secret) labels.Set {
objectMetaFieldsSet := generic.ObjectMetaFieldsSet(obj.ObjectMeta, true)
secretSpecificFieldsSet := fields.Set{
"type": string(obj.Type),
}
return labels.Set(generic.MergeFieldsSets(objectMetaFieldsSet, secretSpecificFieldsSet))
}
// GetPodPetSets returns a list of PetSets managing a pod. Returns an error only if no matching PetSets are found.
func (s *StoreToPetSetLister) GetPodPetSets(pod *api.Pod) (psList []apps.PetSet, err error) {
var selector labels.Selector
var ps apps.PetSet
if len(pod.Labels) == 0 {
err = fmt.Errorf("no PetSets found for pod %v because it has no labels", pod.Name)
return
}
for _, m := range s.Store.List() {
ps = *m.(*apps.PetSet)
if ps.Namespace != pod.Namespace {
continue
}
selector, err = unversioned.LabelSelectorAsSelector(ps.Spec.Selector)
if err != nil {
err = fmt.Errorf("invalid selector: %v", err)
return
}
// If a PetSet with a nil or empty selector creeps in, it should match nothing, not everything.
if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
continue
}
psList = append(psList, ps)
}
if len(psList) == 0 {
err = fmt.Errorf("could not find PetSet for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
// GetPodJobs returns a list of jobs managing a pod. Returns an error only if no matching jobs are found.
func (s *StoreToJobLister) GetPodJobs(pod *api.Pod) (jobs []batch.Job, err error) {
var selector labels.Selector
var job batch.Job
if len(pod.Labels) == 0 {
err = fmt.Errorf("no jobs found for pod %v because it has no labels", pod.Name)
return
}
for _, m := range s.Store.List() {
job = *m.(*batch.Job)
if job.Namespace != pod.Namespace {
continue
}
selector, _ = unversioned.LabelSelectorAsSelector(job.Spec.Selector)
if !selector.Matches(labels.Set(pod.Labels)) {
continue
}
jobs = append(jobs, job)
}
if len(jobs) == 0 {
err = fmt.Errorf("could not find jobs for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
// GetPodDaemonSets returns a list of daemon sets managing a pod.
// Returns an error if and only if no matching daemon sets are found.
func (s *StoreToDaemonSetLister) GetPodDaemonSets(pod *api.Pod) (daemonSets []extensions.DaemonSet, err error) {
var selector labels.Selector
var daemonSet extensions.DaemonSet
if len(pod.Labels) == 0 {
err = fmt.Errorf("no daemon sets found for pod %v because it has no labels", pod.Name)
return
}
for _, m := range s.Store.List() {
daemonSet = *m.(*extensions.DaemonSet)
if daemonSet.Namespace != pod.Namespace {
continue
}
selector, err = unversioned.LabelSelectorAsSelector(daemonSet.Spec.Selector)
if err != nil {
// this should not happen if the DaemonSet passed validation
return nil, err
}
// If a daemonSet with a nil or empty selector creeps in, it should match nothing, not everything.
if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
continue
}
daemonSets = append(daemonSets, daemonSet)
}
if len(daemonSets) == 0 {
err = fmt.Errorf("could not find daemon set for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
// GetPodReplicaSets returns a list of ReplicaSets managing a pod. Returns an error only if no matching ReplicaSets are found.
func (s *StoreToReplicaSetLister) GetPodReplicaSets(pod *api.Pod) (rss []extensions.ReplicaSet, err error) {
var selector labels.Selector
var rs extensions.ReplicaSet
if len(pod.Labels) == 0 {
err = fmt.Errorf("no ReplicaSets found for pod %v because it has no labels", pod.Name)
return
}
for _, m := range s.Store.List() {
rs = *m.(*extensions.ReplicaSet)
if rs.Namespace != pod.Namespace {
continue
}
selector, err = unversioned.LabelSelectorAsSelector(rs.Spec.Selector)
if err != nil {
err = fmt.Errorf("invalid selector: %v", err)
return
}
// If a ReplicaSet with a nil or empty selector creeps in, it should match nothing, not everything.
if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
continue
}
rss = append(rss, rs)
}
if len(rss) == 0 {
err = fmt.Errorf("could not find ReplicaSet for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
func (t *Tester) testListMatchLabels(obj runtime.Object, assignFn AssignFunc) {
ctx := t.TestContext()
testLabels := map[string]string{"key": "value"}
foo3 := copyOrDie(obj)
t.setObjectMeta(foo3, "foo3")
foo4 := copyOrDie(obj)
foo4Meta := t.getObjectMetaOrFail(foo4)
foo4Meta.Name = "foo4"
foo4Meta.Namespace = api.NamespaceValue(ctx)
foo4Meta.Labels = testLabels
objs := ([]runtime.Object{foo3, foo4})
assignFn(objs)
filtered := []runtime.Object{objs[1]}
selector := labels.SelectorFromSet(labels.Set(testLabels))
options := &api.ListOptions{LabelSelector: selector}
listObj, err := t.storage.(rest.Lister).List(ctx, options)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
items, err := listToItems(listObj)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if len(items) != len(filtered) {
t.Errorf("unexpected number of items: %v", len(items))
}
if !api.Semantic.DeepEqual(filtered, items) {
t.Errorf("expected: %#v, got: %#v", filtered, items)
}
}
// GetDeploymentsForReplicaSet returns a list of deployments managing a replica set. Returns an error only if no matching deployments are found.
func (s *StoreToDeploymentLister) GetDeploymentsForReplicaSet(rs *extensions.ReplicaSet) (deployments []extensions.Deployment, err error) {
var d extensions.Deployment
if len(rs.Labels) == 0 {
err = fmt.Errorf("no deployments found for ReplicaSet %v because it has no labels", rs.Name)
return
}
// TODO: MODIFY THIS METHOD so that it checks for the podTemplateSpecHash label
for _, m := range s.Store.List() {
d = *m.(*extensions.Deployment)
if d.Namespace != rs.Namespace {
continue
}
selector, err := unversioned.LabelSelectorAsSelector(d.Spec.Selector)
if err != nil {
return nil, fmt.Errorf("invalid label selector: %v", err)
}
// If a deployment with a nil or empty selector creeps in, it should match nothing, not everything.
if selector.Empty() || !selector.Matches(labels.Set(rs.Labels)) {
continue
}
deployments = append(deployments, d)
}
if len(deployments) == 0 {
err = fmt.Errorf("could not find deployments set for ReplicaSet %s in namespace %s with labels: %v", rs.Name, rs.Namespace, rs.Labels)
}
return
}
func (r RealPodControl) createPods(nodeName, namespace string, template *api.PodTemplateSpec, object runtime.Object) error {
pod, err := GetPodFromTemplate(template, object)
if err != nil {
return err
}
if len(nodeName) != 0 {
pod.Spec.NodeName = nodeName
}
if labels.Set(pod.Labels).AsSelector().Empty() {
return fmt.Errorf("unable to create pods, no labels")
}
if newPod, err := r.KubeClient.Core().Pods(namespace).Create(pod); err != nil {
r.Recorder.Eventf(object, api.EventTypeWarning, "FailedCreate", "Error creating: %v", err)
return fmt.Errorf("unable to create pods: %v", err)
} else {
accessor, err := meta.Accessor(object)
if err != nil {
glog.Errorf("parentObject does not have ObjectMeta, %v", err)
return nil
}
glog.V(4).Infof("Controller %v created pod %v", accessor.GetName(), newPod.Name)
r.Recorder.Eventf(object, api.EventTypeNormal, "SuccessfulCreate", "Created pod: %v", newPod.Name)
}
return nil
}
func TestSelectableFieldLabelConversions(t *testing.T) {
apitesting.TestSelectableFieldLabelConversionsOfKind(t,
testapi.Extensions.GroupVersion().String(),
"Job",
labels.Set(JobToSelectableFields(&batch.Job{})),
nil,
)
}
// PersistentVolumeToSelectableFields returns a label set that represents the object
func PersistentVolumeToSelectableFields(persistentvolume *api.PersistentVolume) labels.Set {
objectMetaFieldsSet := generic.ObjectMetaFieldsSet(persistentvolume.ObjectMeta, false)
specificFieldsSet := fields.Set{
// This is a bug, but we need to support it for backward compatibility.
"name": persistentvolume.Name,
}
return labels.Set(generic.MergeFieldsSets(objectMetaFieldsSet, specificFieldsSet))
}
func TestSelectableFieldLabelConversions(t *testing.T) {
apitesting.TestSelectableFieldLabelConversionsOfKind(t,
testapi.Autoscaling.GroupVersion().String(),
"Autoscaler",
labels.Set(AutoscalerToSelectableFields(&autoscaling.HorizontalPodAutoscaler{})),
nil,
)
}
func TestSelectableFieldLabelConversions(t *testing.T) {
apitesting.TestSelectableFieldLabelConversionsOfKind(t,
testapi.Extensions.GroupVersion().String(),
"Deployment",
labels.Set(DeploymentToSelectableFields(&extensions.Deployment{})),
nil,
)
}
func TestSelectableFieldLabelConversions(t *testing.T) {
apitesting.TestSelectableFieldLabelConversionsOfKind(t,
testapi.Default.GroupVersion().String(),
"LimitRange",
labels.Set(LimitRangeToSelectableFields(&api.LimitRange{})),
nil,
)
}
// NamespaceToSelectableFields returns a label set that represents the object
func NamespaceToSelectableFields(namespace *api.Namespace) labels.Set {
objectMetaFieldsSet := generic.ObjectMetaFieldsSet(namespace.ObjectMeta, false)
specificFieldsSet := fields.Set{
"status.phase": string(namespace.Status.Phase),
// This is a bug, but we need to support it for backward compatibility.
"name": namespace.Name,
}
return labels.Set(generic.MergeFieldsSets(objectMetaFieldsSet, specificFieldsSet))
}
// 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.(*extensions.ThirdPartyResourceData)
if !ok {
return false, fmt.Errorf("not a ThirdPartyResourceData")
}
fields := SelectableFields(sa)
return label.Matches(labels.Set(sa.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
})
}
// 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.(*rbac.RoleBinding)
if !ok {
return false, fmt.Errorf("not a RoleBinding")
}
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
})
}
func (s storeReplicaSetsNamespacer) List(selector labels.Selector) (rss []extensions.ReplicaSet, err error) {
for _, c := range s.store.List() {
rs := *(c.(*extensions.ReplicaSet))
if s.namespace == api.NamespaceAll || s.namespace == rs.Namespace {
if selector.Matches(labels.Set(rs.Labels)) {
rss = append(rss, rs)
}
}
}
return
}
func TestSelectableFieldLabelConversions(t *testing.T) {
_, fieldsSet, err := EndpointsAttributes(&api.Endpoints{})
if err != nil {
t.Fatal(err)
}
apitesting.TestSelectableFieldLabelConversionsOfKind(t,
testapi.Default.GroupVersion().String(),
"Endpoints",
labels.Set(fieldsSet),
nil,
)
}
func TestFiltering(t *testing.T) {
server, etcdStorage := newEtcdTestStorage(t, testapi.Default.Codec(), etcdtest.PathPrefix())
defer server.Terminate(t)
cacher := newTestCacher(etcdStorage)
defer cacher.Stop()
// Ensure that the cacher is initialized, before creating any pods,
// so that we are sure that all events will be present in cacher.
syncWatcher, err := cacher.Watch(context.TODO(), "pods/ns/foo", "0", storage.Everything)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
syncWatcher.Stop()
podFoo := makeTestPod("foo")
podFoo.Labels = map[string]string{"filter": "foo"}
podFooFiltered := makeTestPod("foo")
podFooPrime := makeTestPod("foo")
podFooPrime.Labels = map[string]string{"filter": "foo"}
podFooPrime.Spec.NodeName = "fakeNode"
fooCreated := updatePod(t, etcdStorage, podFoo, nil)
fooFiltered := updatePod(t, etcdStorage, podFooFiltered, fooCreated)
fooUnfiltered := updatePod(t, etcdStorage, podFoo, fooFiltered)
_ = updatePod(t, etcdStorage, podFooPrime, fooUnfiltered)
deleted := api.Pod{}
if err := etcdStorage.Delete(context.TODO(), etcdtest.AddPrefix("pods/ns/foo"), &deleted, nil); err != nil {
t.Errorf("Unexpected error: %v", err)
}
// Set up Watch for object "podFoo" with label filter set.
selector := labels.SelectorFromSet(labels.Set{"filter": "foo"})
filter := func(obj runtime.Object) bool {
metadata, err := meta.Accessor(obj)
if err != nil {
t.Errorf("Unexpected error: %v", err)
return false
}
return selector.Matches(labels.Set(metadata.GetLabels()))
}
watcher, err := cacher.Watch(context.TODO(), "pods/ns/foo", fooCreated.ResourceVersion, filter)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer watcher.Stop()
verifyWatchEvent(t, watcher, watch.Deleted, podFooFiltered)
verifyWatchEvent(t, watcher, watch.Added, podFoo)
verifyWatchEvent(t, watcher, watch.Modified, podFooPrime)
verifyWatchEvent(t, watcher, watch.Deleted, podFooPrime)
}
// MatchIngress is the filter used by the generic etcd backend to ingress
// watch events from etcd to clients of the apiserver only interested in specific
// labels/fields.
func MatchIngress(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) {
ingress, ok := obj.(*extensions.Ingress)
if !ok {
return nil, nil, fmt.Errorf("Given object is not an Ingress.")
}
return labels.Set(ingress.ObjectMeta.Labels), IngressToSelectableFields(ingress), nil
},
}
}
// MatchDeployment 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 MatchDeployment(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) {
deployment, ok := obj.(*extensions.Deployment)
if !ok {
return nil, nil, fmt.Errorf("given object is not a deployment.")
}
return labels.Set(deployment.ObjectMeta.Labels), DeploymentToSelectableFields(deployment), nil
},
}
}