74 lines
2.3 KiB
Go
74 lines
2.3 KiB
Go
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/*
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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 v1beta1
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import (
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"fmt"
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"k8s.io/api/core/v1"
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extensions "k8s.io/api/extensions/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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)
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// ReplicaSetListerExpansion allows custom methods to be added to
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// ReplicaSetLister.
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type ReplicaSetListerExpansion interface {
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GetPodReplicaSets(pod *v1.Pod) ([]*extensions.ReplicaSet, error)
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}
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// ReplicaSetNamespaceListerExpansion allows custom methods to be added to
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// ReplicaSetNamespaceLister.
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type ReplicaSetNamespaceListerExpansion interface{}
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// GetPodReplicaSets returns a list of ReplicaSets 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 ReplicaSets are found.
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func (s *replicaSetLister) GetPodReplicaSets(pod *v1.Pod) ([]*extensions.ReplicaSet, error) {
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if len(pod.Labels) == 0 {
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return nil, fmt.Errorf("no ReplicaSets found for pod %v because it has no labels", pod.Name)
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}
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list, err := s.ReplicaSets(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 rss []*extensions.ReplicaSet
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for _, rs := range list {
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if rs.Namespace != pod.Namespace {
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continue
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}
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selector, err := metav1.LabelSelectorAsSelector(rs.Spec.Selector)
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if err != nil {
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return nil, fmt.Errorf("invalid selector: %v", err)
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}
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// If a ReplicaSet 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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rss = append(rss, rs)
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}
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if len(rss) == 0 {
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return nil, fmt.Errorf("could not find ReplicaSet for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
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}
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return rss, nil
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}
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