74 lines
2.4 KiB
Go
74 lines
2.4 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 v1beta1
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import (
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"fmt"
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"github.com/golang/glog"
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"k8s.io/api/core/v1"
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policy "k8s.io/api/policy/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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// PodDisruptionBudgetListerExpansion allows custom methods to be added to
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// PodDisruptionBudgetLister.
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type PodDisruptionBudgetListerExpansion interface {
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GetPodPodDisruptionBudgets(pod *v1.Pod) ([]*policy.PodDisruptionBudget, error)
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}
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// PodDisruptionBudgetNamespaceListerExpansion allows custom methods to be added to
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// PodDisruptionBudgetNamespaceLister.
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type PodDisruptionBudgetNamespaceListerExpansion interface{}
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// GetPodPodDisruptionBudgets returns a list of PodDisruptionBudgets matching a pod. Returns an error only if no matching PodDisruptionBudgets are found.
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func (s *podDisruptionBudgetLister) GetPodPodDisruptionBudgets(pod *v1.Pod) ([]*policy.PodDisruptionBudget, error) {
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var selector labels.Selector
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if len(pod.Labels) == 0 {
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return nil, fmt.Errorf("no PodDisruptionBudgets found for pod %v because it has no labels", pod.Name)
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}
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list, err := s.PodDisruptionBudgets(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 pdbList []*policy.PodDisruptionBudget
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for i := range list {
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pdb := list[i]
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selector, err = metav1.LabelSelectorAsSelector(pdb.Spec.Selector)
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if err != nil {
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glog.Warningf("invalid selector: %v", err)
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// TODO(mml): add an event to the PDB
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continue
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}
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// If a PDB 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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pdbList = append(pdbList, pdb)
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}
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if len(pdbList) == 0 {
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return nil, fmt.Errorf("could not find PodDisruptionBudget for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
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}
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return pdbList, nil
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}
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