Golang 개발: Kubernetes를 사용하여 컨테이너화된 애플리케이션 관리

$ go mod init example.com/k8s-app

package main

import (
    "fmt"
    appsv1 "k8s.io/api/apps/v1"
    metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    "k8s.io/client-go/kubernetes"
    "k8s.io/client-go/tools/clientcmd"
    "os"
)

func main() {
    // 加载kubeconfig文件
    config, err := clientcmd.BuildConfigFromFlags("", os.Getenv("KUBECONFIG"))
    if err != nil {
        panic(err.Error())
    }

    // 创建一个新的Kubernetes客户端
    clientset, err := kubernetes.NewForConfig(config)
    if err != nil {
        panic(err.Error())
    }

    // 创建一个新的Deployment对象
    deployment := &appsv1.Deployment{
        ObjectMeta: metav1.ObjectMeta{
            Name:      "my-deployment",
            Namespace: "default",
        },
        Spec: appsv1.DeploymentSpec{
            Replicas: int32Ptr(3),
            Selector: &metav1.LabelSelector{
                MatchLabels: map[string]string{
                    "app": "my-app",
                },
            },
            Template: corev1.PodTemplateSpec{
                ObjectMeta: metav1.ObjectMeta{
                    Labels: map[string]string{
                        "app": "my-app",
                    },
                },
                Spec: corev1.PodSpec{
                    Containers: []corev1.Container{
                        {
                            Name:  "my-container",
                            Image: "my-image:latest",
                        },
                    },
                },
            },
        },
    }

    // 创建Deployment对象
    result, err := clientset.AppsV1().Deployments("default").Create(deployment)
    if err != nil {
        panic(err.Error())
    }
    fmt.Printf("Created deployment %q
", result.GetObjectMeta().GetName())
}

// 辅助函数，用于将整数转换为指针
func int32Ptr(i int32) *int32 { return &i }

$ export KUBECONFIG=~/.kube/config

$ go build -o k8s-app
$ ./k8s-app

Created deployment "my-deployment"