mirror of
https://github.com/k3s-io/kubernetes.git
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81 lines
2.4 KiB
Go
81 lines
2.4 KiB
Go
/*
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Copyright 2016 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 utils
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import (
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"time"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/apimachinery/pkg/watch"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/cache"
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)
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// Convenient wrapper around cache.Store that returns list of v1.Pod instead of interface{}.
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type PodStore struct {
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cache.Store
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stopCh chan struct{}
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Reflector *cache.Reflector
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}
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func NewPodStore(c clientset.Interface, namespace string, label labels.Selector, field fields.Selector) (*PodStore, error) {
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lw := &cache.ListWatch{
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ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
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options.LabelSelector = label.String()
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options.FieldSelector = field.String()
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obj, err := c.CoreV1().Pods(namespace).List(options)
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return runtime.Object(obj), err
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},
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WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
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options.LabelSelector = label.String()
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options.FieldSelector = field.String()
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return c.CoreV1().Pods(namespace).Watch(options)
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},
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}
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store := cache.NewStore(cache.MetaNamespaceKeyFunc)
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stopCh := make(chan struct{})
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reflector := cache.NewReflector(lw, &v1.Pod{}, store, 0)
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go reflector.Run(stopCh)
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if err := wait.PollImmediate(50*time.Millisecond, 2*time.Minute, func() (bool, error) {
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if len(reflector.LastSyncResourceVersion()) != 0 {
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return true, nil
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}
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return false, nil
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}); err != nil {
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return nil, err
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}
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return &PodStore{Store: store, stopCh: stopCh, Reflector: reflector}, nil
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}
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func (s *PodStore) List() []*v1.Pod {
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objects := s.Store.List()
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pods := make([]*v1.Pod, 0)
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for _, o := range objects {
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pods = append(pods, o.(*v1.Pod))
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}
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return pods
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}
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func (s *PodStore) Stop() {
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close(s.stopCh)
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}
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