k8s.io/client-go@v0.31.1/examples/in-cluster-client-configuration/main.go (about) 1 /* 2 Copyright 2016 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 // Note: the example only works with the code within the same release/branch. 18 package main 19 20 import ( 21 "context" 22 "fmt" 23 "time" 24 25 "k8s.io/apimachinery/pkg/api/errors" 26 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 27 "k8s.io/client-go/kubernetes" 28 "k8s.io/client-go/rest" 29 // 30 // Uncomment to load all auth plugins 31 // _ "k8s.io/client-go/plugin/pkg/client/auth" 32 // 33 // Or uncomment to load specific auth plugins 34 // _ "k8s.io/client-go/plugin/pkg/client/auth/azure" 35 // _ "k8s.io/client-go/plugin/pkg/client/auth/gcp" 36 // _ "k8s.io/client-go/plugin/pkg/client/auth/oidc" 37 ) 38 39 func main() { 40 // creates the in-cluster config 41 config, err := rest.InClusterConfig() 42 if err != nil { 43 panic(err.Error()) 44 } 45 // creates the clientset 46 clientset, err := kubernetes.NewForConfig(config) 47 if err != nil { 48 panic(err.Error()) 49 } 50 for { 51 // get pods in all the namespaces by omitting namespace 52 // Or specify namespace to get pods in particular namespace 53 pods, err := clientset.CoreV1().Pods("").List(context.TODO(), metav1.ListOptions{}) 54 if err != nil { 55 panic(err.Error()) 56 } 57 fmt.Printf("There are %d pods in the cluster\n", len(pods.Items)) 58 59 // Examples for error handling: 60 // - Use helper functions e.g. errors.IsNotFound() 61 // - And/or cast to StatusError and use its properties like e.g. ErrStatus.Message 62 _, err = clientset.CoreV1().Pods("default").Get(context.TODO(), "example-xxxxx", metav1.GetOptions{}) 63 if errors.IsNotFound(err) { 64 fmt.Printf("Pod example-xxxxx not found in default namespace\n") 65 } else if statusError, isStatus := err.(*errors.StatusError); isStatus { 66 fmt.Printf("Error getting pod %v\n", statusError.ErrStatus.Message) 67 } else if err != nil { 68 panic(err.Error()) 69 } else { 70 fmt.Printf("Found example-xxxxx pod in default namespace\n") 71 } 72 73 time.Sleep(10 * time.Second) 74 } 75 }