66 lines
2.2 KiB
Go
66 lines
2.2 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package v1
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import (
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"fmt"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/labels"
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)
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// ReplicationControllerListerExpansion allows custom methods to be added to
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// ReplicationControllerLister.
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type ReplicationControllerListerExpansion interface {
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GetPodControllers(pod *v1.Pod) ([]*v1.ReplicationController, error)
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}
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// ReplicationControllerNamespaceListerExpansion allows custom methods to be added to
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// ReplicationControllerNamespaceLister.
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type ReplicationControllerNamespaceListerExpansion interface{}
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// GetPodControllers returns a list of ReplicationControllers that potentially match a pod.
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// Only the one specified in the Pod's ControllerRef will actually manage it.
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// Returns an error only if no matching ReplicationControllers are found.
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func (s *replicationControllerLister) GetPodControllers(pod *v1.Pod) ([]*v1.ReplicationController, error) {
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if len(pod.Labels) == 0 {
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return nil, fmt.Errorf("no controllers found for pod %v because it has no labels", pod.Name)
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}
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items, err := s.ReplicationControllers(pod.Namespace).List(labels.Everything())
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if err != nil {
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return nil, err
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}
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var controllers []*v1.ReplicationController
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for i := range items {
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rc := items[i]
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selector := labels.Set(rc.Spec.Selector).AsSelectorPreValidated()
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// If an rc with a nil or empty selector creeps in, it should match nothing, not everything.
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if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
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continue
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}
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controllers = append(controllers, rc)
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}
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if len(controllers) == 0 {
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return nil, fmt.Errorf("could not find controller for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
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}
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return controllers, nil
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}
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