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Simple Kubernetes client-go example code
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package main | |
import ( | |
"flag" | |
"fmt" | |
"os" | |
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | |
"k8s.io/client-go/kubernetes" | |
"k8s.io/client-go/rest" | |
"k8s.io/client-go/tools/clientcmd" | |
) | |
func main() { | |
kubeconfig := "" | |
flag.StringVar(&kubeconfig, "kubeconfig", kubeconfig, "kubeconfig file") | |
flag.Parse() | |
if kubeconfig == "" { | |
kubeconfig = os.Getenv("KUBECONFIG") | |
} | |
var ( | |
config *rest.Config | |
err error | |
) | |
if kubeconfig != "" { | |
config, err = clientcmd.BuildConfigFromFlags("", kubeconfig) | |
} else { | |
config, err = rest.InClusterConfig() | |
} | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "error creating client: %v", err) | |
os.Exit(1) | |
} | |
client := kubernetes.NewForConfigOrDie(config) | |
list, err := client.CoreV1().Nodes().List(metav1.ListOptions{}) | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "error listing nodes: %v", err) | |
os.Exit(1) | |
} | |
for _, node := range list.Items { | |
fmt.Printf("Node: %s\n", node.Name) | |
} | |
} |
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