Matthias Andreas Benkard | 832a54e | 2019-01-29 09:27:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | Copyright 2017 The Kubernetes Authors. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package options |
| 18 | |
| 19 | import ( |
| 20 | "fmt" |
| 21 | "time" |
| 22 | |
| 23 | "github.com/spf13/pflag" |
| 24 | "k8s.io/apiserver/pkg/server" |
| 25 | clientgoinformers "k8s.io/client-go/informers" |
| 26 | clientgoclientset "k8s.io/client-go/kubernetes" |
| 27 | "k8s.io/client-go/rest" |
| 28 | "k8s.io/client-go/tools/clientcmd" |
| 29 | ) |
| 30 | |
| 31 | // CoreAPIOptions contains options to configure the connection to a core API Kubernetes apiserver. |
| 32 | type CoreAPIOptions struct { |
| 33 | // CoreAPIKubeconfigPath is a filename for a kubeconfig file to contact the core API server with. |
| 34 | // If it is not set, the in cluster config is used. |
| 35 | CoreAPIKubeconfigPath string |
| 36 | } |
| 37 | |
| 38 | func NewCoreAPIOptions() *CoreAPIOptions { |
| 39 | return &CoreAPIOptions{} |
| 40 | } |
| 41 | |
| 42 | func (o *CoreAPIOptions) AddFlags(fs *pflag.FlagSet) { |
| 43 | if o == nil { |
| 44 | return |
| 45 | } |
| 46 | |
| 47 | fs.StringVar(&o.CoreAPIKubeconfigPath, "kubeconfig", o.CoreAPIKubeconfigPath, |
| 48 | "kubeconfig file pointing at the 'core' kubernetes server.") |
| 49 | } |
| 50 | |
| 51 | func (o *CoreAPIOptions) ApplyTo(config *server.RecommendedConfig) error { |
| 52 | if o == nil { |
| 53 | return nil |
| 54 | } |
| 55 | |
| 56 | // create shared informer for Kubernetes APIs |
| 57 | var kubeconfig *rest.Config |
| 58 | var err error |
| 59 | if len(o.CoreAPIKubeconfigPath) > 0 { |
| 60 | loadingRules := &clientcmd.ClientConfigLoadingRules{ExplicitPath: o.CoreAPIKubeconfigPath} |
| 61 | loader := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, &clientcmd.ConfigOverrides{}) |
| 62 | kubeconfig, err = loader.ClientConfig() |
| 63 | if err != nil { |
| 64 | return fmt.Errorf("failed to load kubeconfig at %q: %v", o.CoreAPIKubeconfigPath, err) |
| 65 | } |
| 66 | } else { |
| 67 | kubeconfig, err = rest.InClusterConfig() |
| 68 | if err != nil { |
| 69 | return err |
| 70 | } |
| 71 | } |
| 72 | clientgoExternalClient, err := clientgoclientset.NewForConfig(kubeconfig) |
| 73 | if err != nil { |
| 74 | return fmt.Errorf("failed to create Kubernetes clientset: %v", err) |
| 75 | } |
| 76 | config.ClientConfig = kubeconfig |
| 77 | config.SharedInformerFactory = clientgoinformers.NewSharedInformerFactory(clientgoExternalClient, 10*time.Minute) |
| 78 | |
| 79 | return nil |
| 80 | } |
| 81 | |
| 82 | func (o *CoreAPIOptions) Validate() []error { |
| 83 | return nil |
| 84 | } |