| /* |
| Copyright 2016 The Kubernetes Authors. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| // Note: the example only works with the code within the same release/branch. |
| package main |
| |
| import ( |
| "flag" |
| "fmt" |
| "os" |
| "path/filepath" |
| "time" |
| |
| "k8s.io/apimachinery/pkg/api/errors" |
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| "k8s.io/client-go/kubernetes" |
| "k8s.io/client-go/tools/clientcmd" |
| // Uncomment the following line to load the gcp plugin (only required to authenticate against GKE clusters). |
| // _ "k8s.io/client-go/plugin/pkg/client/auth/gcp" |
| ) |
| |
| func main() { |
| var kubeconfig *string |
| if home := homeDir(); home != "" { |
| kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file") |
| } else { |
| kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file") |
| } |
| flag.Parse() |
| |
| // use the current context in kubeconfig |
| config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig) |
| if err != nil { |
| panic(err.Error()) |
| } |
| |
| // create the clientset |
| clientset, err := kubernetes.NewForConfig(config) |
| if err != nil { |
| panic(err.Error()) |
| } |
| for { |
| pods, err := clientset.CoreV1().Pods("").List(metav1.ListOptions{}) |
| if err != nil { |
| panic(err.Error()) |
| } |
| fmt.Printf("There are %d pods in the cluster\n", len(pods.Items)) |
| |
| // Examples for error handling: |
| // - Use helper functions like e.g. errors.IsNotFound() |
| // - And/or cast to StatusError and use its properties like e.g. ErrStatus.Message |
| namespace := "default" |
| pod := "example-xxxxx" |
| _, err = clientset.CoreV1().Pods(namespace).Get(pod, metav1.GetOptions{}) |
| if errors.IsNotFound(err) { |
| fmt.Printf("Pod %s in namespace %s not found\n", pod, namespace) |
| } else if statusError, isStatus := err.(*errors.StatusError); isStatus { |
| fmt.Printf("Error getting pod %s in namespace %s: %v\n", |
| pod, namespace, statusError.ErrStatus.Message) |
| } else if err != nil { |
| panic(err.Error()) |
| } else { |
| fmt.Printf("Found pod %s in namespace %s\n", pod, namespace) |
| } |
| |
| time.Sleep(10 * time.Second) |
| } |
| } |
| |
| func homeDir() string { |
| if h := os.Getenv("HOME"); h != "" { |
| return h |
| } |
| return os.Getenv("USERPROFILE") // windows |
| } |