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79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
/*
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Copyright 2018 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 runtimeclass
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import (
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"fmt"
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"k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/client-go/informers"
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clientset "k8s.io/client-go/kubernetes"
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nodev1 "k8s.io/client-go/listers/node/v1"
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)
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// Manager caches RuntimeClass API objects, and provides accessors to the Kubelet.
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type Manager struct {
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informerFactory informers.SharedInformerFactory
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lister nodev1.RuntimeClassLister
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}
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// NewManager returns a new RuntimeClass Manager. Run must be called before the manager can be used.
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func NewManager(client clientset.Interface) *Manager {
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const resyncPeriod = 0
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factory := informers.NewSharedInformerFactory(client, resyncPeriod)
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lister := factory.Node().V1().RuntimeClasses().Lister()
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return &Manager{
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informerFactory: factory,
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lister: lister,
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}
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}
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// Start starts syncing the RuntimeClass cache with the apiserver.
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func (m *Manager) Start(stopCh <-chan struct{}) {
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m.informerFactory.Start(stopCh)
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}
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// WaitForCacheSync exposes the WaitForCacheSync method on the informer factory for testing
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// purposes.
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func (m *Manager) WaitForCacheSync(stopCh <-chan struct{}) {
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m.informerFactory.WaitForCacheSync(stopCh)
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}
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// LookupRuntimeHandler returns the RuntimeHandler string associated with the given RuntimeClass
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// name (or the default of "" for nil). If the RuntimeClass is not found, it returns an
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// errors.NotFound error.
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func (m *Manager) LookupRuntimeHandler(runtimeClassName *string) (string, error) {
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if runtimeClassName == nil || *runtimeClassName == "" {
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// The default RuntimeClass always resolves to the empty runtime handler.
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return "", nil
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}
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name := *runtimeClassName
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rc, err := m.lister.Get(name)
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if err != nil {
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if errors.IsNotFound(err) {
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return "", err
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}
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return "", fmt.Errorf("failed to lookup RuntimeClass %s: %v", name, err)
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}
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return rc.Handler, nil
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}
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