kubectlを利用する場合
aws eks update-kubeconfig --name vamdemic-development-eks-cluster
kube-systemのnamespaceでは、12のPodが起動中
yuta:~/go-kubernentes (master *+=) $ kubectl get pod -n kube-system NAME READY STATUS RESTARTS AGE alb-ingress-controller-5b4b5fd775-8vxt7 1/1 Running 1 16d aws-node-829mc 1/1 Running 0 16d aws-node-q4d67 1/1 Running 0 16d coredns-79769ff86-h2tck 1/1 Running 0 16d coredns-79769ff86-wclkd 1/1 Running 0 16d ebs-csi-controller-587cb4db9b-6j8xz 4/4 Running 3 16d ebs-csi-controller-587cb4db9b-w5s5s 4/4 Running 2 16d ebs-csi-node-gbpx4 3/3 Running 0 16d ebs-csi-node-l8rx5 3/3 Running 0 16d efs-csi-node-v6m4m 3/3 Running 0 16d efs-csi-node-vtf5r 3/3 Running 0 16d kube-proxy-7gbmn 1/1 Running 0 16d kube-proxy-8h4tk 1/1 Running 0 16d
GoでPod一覧を取得する場合
package main
import (
"context"
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"log"
"os"
"path/filepath"
)
func main() {
// Kubeconfigのファイルパスを指定
kubeconfig := filepath.Join(os.Getenv("HOME"), ".kube", "config")
config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
if err != nil {
log.Fatal(err)
}
// Kubeconfigを読み込む
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
log.Fatal(err)
}
// Pod一覧を呼び出す
namespace := "kube-system"
pods, err := clientset.CoreV1().Pods(namespace).List(context.TODO(), metav1.ListOptions{})
if err != nil {
log.Fatalln("failed to get pods:", err)
}
// print pods
// pods.Items: []v1.Pod
for i, pod := range pods.Items {
fmt.Printf("[%d] %s\n", i, pod.GetName())
}
}
出力結果
yuta:~/go-kubernentes (master *+=) $ go run main.go [0] alb-ingress-controller-5b4b5fd775-8vxt7 [1] aws-node-829mc [2] aws-node-q4d67 [3] coredns-79769ff86-h2tck [4] coredns-79769ff86-wclkd [5] ebs-csi-controller-587cb4db9b-6j8xz [6] ebs-csi-controller-587cb4db9b-w5s5s [7] ebs-csi-node-gbpx4 [8] ebs-csi-node-l8rx5 [9] efs-csi-node-v6m4m [10] efs-csi-node-vtf5r [11] kube-proxy-7gbmn [12] kube-proxy-8h4tk
参考
https://pizi.netlify.app/posts/kubernetes-client-go-example/#node%E3%81%AE%E5%8F%96%E5%BE%97
https://github.com/kubernetes/client-go