// 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 = labels.Set(daemonSet.Spec.Selector).AsSelector()
// 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
}
// 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
}
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 daemon set for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
// 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
}
// GetPodControllers 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 []extensions.Job, err error) {
var selector labels.Selector
var job extensions.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.(*extensions.Job)
if job.Namespace != pod.Namespace {
continue
}
selector, _ = extensions.PodSelectorAsSelector(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
}
// 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
}
// 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
})
}
// MatchPersistentVolumeClaim returns a generic matcher for a given label and field selector.
func MatchPersistentVolumeClaim(label labels.Selector, field fields.Selector) generic.Matcher {
return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
persistentvolumeclaimObj, ok := obj.(*api.PersistentVolumeClaim)
if !ok {
return false, fmt.Errorf("not a persistentvolumeclaim")
}
fields := PersistentVolumeClaimToSelectableFields(persistentvolumeclaimObj)
return label.Matches(labels.Set(persistentvolumeclaimObj.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.(*extensions.ThirdPartyResource)
if !ok {
return false, fmt.Errorf("not a ThirdPartyResource")
}
fields := SelectableFields(sa)
return label.Matches(labels.Set(sa.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.(*api.ServiceAccount)
if !ok {
return false, fmt.Errorf("not a serviceaccount")
}
fields := SelectableFields(sa)
return label.Matches(labels.Set(sa.Labels)) && field.Matches(fields), nil
})
}
// 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
}
// 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
}
func (c *FakeHorizontalPodAutoscalers) List(label labels.Selector, field fields.Selector) (*extensions.HorizontalPodAutoscalerList, error) {
obj, err := c.Fake.Invokes(NewListAction("horizontalpodautoscalers", c.Namespace, label, field), &extensions.HorizontalPodAutoscalerList{})
if obj == nil {
return nil, err
}
list := &extensions.HorizontalPodAutoscalerList{}
for _, a := range obj.(*extensions.HorizontalPodAutoscalerList).Items {
if label.Matches(labels.Set(a.Labels)) {
list.Items = append(list.Items, a)
}
}
return list, err
}
func (c *FakePods) List(label labels.Selector, field fields.Selector) (*api.PodList, error) {
obj, err := c.Fake.Invokes(NewListAction("pods", c.Namespace, label, field), &api.PodList{})
if obj == nil {
return nil, err
}
list := &api.PodList{}
for _, pod := range obj.(*api.PodList).Items {
if label.Matches(labels.Set(pod.Labels)) {
list.Items = append(list.Items, pod)
}
}
return list, err
}
func (c *FakeDeployments) List(label labels.Selector, field fields.Selector) (*extensions.DeploymentList, error) {
obj, err := c.Fake.Invokes(NewListAction("deployments", c.Namespace, label, field), &extensions.DeploymentList{})
if obj == nil {
return nil, err
}
list := &extensions.DeploymentList{}
for _, deployment := range obj.(*extensions.DeploymentList).Items {
if label.Matches(labels.Set(deployment.Labels)) {
list.Items = append(list.Items, deployment)
}
}
return list, err
}
// GetPodControllers gets the ReplicationControllers that have the selector that match the labels on the given pod
func (f FakeControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error) {
var selector labels.Selector
for _, controller := range f {
if controller.Namespace != pod.Namespace {
continue
}
selector = labels.Set(controller.Spec.Selector).AsSelector()
if selector.Matches(labels.Set(pod.Labels)) {
controllers = append(controllers, controller)
}
}
if len(controllers) == 0 {
err = fmt.Errorf("Could not find Replication Controller for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
}
return
}
// 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
}
// CheckServiceAffinity ensures that only the nodes 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 node
// 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 node that has value V for label L
func (s *ServiceAffinity) CheckServiceAffinity(pod *api.Pod, existingPods []*api.Pod, nodeID 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 node its hosted on
otherNode, 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(otherNode.Labels).Has(l) {
affinityLabels[l] = labels.Set(otherNode.Labels).Get(l)
}
}
}
}
}
// if there are no existing pods in the service, consider all nodes
if len(affinityLabels) == 0 {
affinitySelector = labels.Everything()
} else {
affinitySelector = labels.Set(affinityLabels).AsSelector()
}
node, err := s.nodeInfo.GetNodeInfo(nodeID)
if err != nil {
return false, err
}
// check if the node matches the selector
return affinitySelector.Matches(labels.Set(node.Labels)), nil
}