91 lines
2.7 KiB
Go
91 lines
2.7 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 options
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import (
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"fmt"
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"time"
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"github.com/spf13/pflag"
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"k8s.io/apiserver/pkg/features"
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"k8s.io/apiserver/pkg/server"
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"k8s.io/apiserver/pkg/util/feature"
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clientgoinformers "k8s.io/client-go/informers"
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clientgoclientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/tools/clientcmd"
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"k8s.io/component-base/traces"
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)
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// CoreAPIOptions contains options to configure the connection to a core API Kubernetes apiserver.
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type CoreAPIOptions struct {
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// CoreAPIKubeconfigPath is a filename for a kubeconfig file to contact the core API server with.
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// If it is not set, the in cluster config is used.
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CoreAPIKubeconfigPath string
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}
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func NewCoreAPIOptions() *CoreAPIOptions {
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return &CoreAPIOptions{}
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}
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func (o *CoreAPIOptions) AddFlags(fs *pflag.FlagSet) {
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if o == nil {
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return
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}
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fs.StringVar(&o.CoreAPIKubeconfigPath, "kubeconfig", o.CoreAPIKubeconfigPath,
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"kubeconfig file pointing at the 'core' kubernetes server.")
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}
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func (o *CoreAPIOptions) ApplyTo(config *server.RecommendedConfig) error {
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if o == nil {
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return nil
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}
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// create shared informer for Kubernetes APIs
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var kubeconfig *rest.Config
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var err error
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if len(o.CoreAPIKubeconfigPath) > 0 {
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loadingRules := &clientcmd.ClientConfigLoadingRules{ExplicitPath: o.CoreAPIKubeconfigPath}
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loader := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, &clientcmd.ConfigOverrides{})
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kubeconfig, err = loader.ClientConfig()
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if err != nil {
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return fmt.Errorf("failed to load kubeconfig at %q: %v", o.CoreAPIKubeconfigPath, err)
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}
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} else {
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kubeconfig, err = rest.InClusterConfig()
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if err != nil {
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return err
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}
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}
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if feature.DefaultFeatureGate.Enabled(features.APIServerTracing) {
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kubeconfig.Wrap(traces.WrapperFor(config.TracerProvider))
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}
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clientgoExternalClient, err := clientgoclientset.NewForConfig(kubeconfig)
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if err != nil {
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return fmt.Errorf("failed to create Kubernetes clientset: %v", err)
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}
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config.ClientConfig = kubeconfig
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config.SharedInformerFactory = clientgoinformers.NewSharedInformerFactory(clientgoExternalClient, 10*time.Minute)
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return nil
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}
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func (o *CoreAPIOptions) Validate() []error {
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return nil
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}
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