通过client-go使用yaml文件，部署服务到K8S

通过调用client-go客户端使用yaml文件的方式部署服务到K8S集群内

func main() {
	namespace := "test"

	config, err := clientcmd.BuildConfigFromFlags("", "config")
	if err != nil {
		panic(err.Error())
	}

	client, err := kubernetes.NewForConfig(config)
	if err != nil {
		panic(err.Error())
	}

	dc := client.Discovery()
	restMapperRes, err := restmapper.GetAPIGroupResources(dc)
	if err != nil {
		log.Fatal(err)
	}
	restMapper := restmapper.NewDiscoveryRESTMapper(restMapperRes) //

	//待创建的文件
	yamls := []string{"deployment.yaml", "service.yaml"}
	for _, s := range yamls {

		fmt.Println(s, "======")
		f, err := os.Open(s)
		if err != nil {
			log.Fatal(err)
		}
		d := yaml.NewYAMLOrJSONDecoder(f, 4096)

		for {
			ext := runtime.RawExtension{}
			if err := d.Decode(&ext); err != nil {
				if err == io.EOF {
					break
				}
				log.Fatal(err)
			}
			fmt.Println("raw: ", string(ext.Raw))

			obj, gvk, err := unstructured.UnstructuredJSONScheme.Decode(ext.Raw, nil, nil)
			fmt.Printf("gvk: %+v\n", gvk)

			mapping, err := restMapper.RESTMapping(gvk.GroupKind(), gvk.Version)
			fmt.Printf("mapping:%+v\n", mapping)
			if err != nil {
				log.Fatal(err)
			}

			// runtime.Object转换为unstructed
			unstructuredObj, err := runtime.DefaultUnstructuredConverter.ToUnstructured(obj)
			if err != nil {
				log.Fatal(err)
			}
			fmt.Printf("unstructuredObj: %+v", unstructuredObj)

			var unstruct unstructured.Unstructured

			unstruct.Object = unstructuredObj

			if md, ok := unstruct.Object["metadata"]; ok {
				metadata := md.(map[string]interface{})
				if internalns, ok := metadata["namespace"]; ok {
					namespace = internalns.(string)
				}
			}

			// 动态客户端
			dclient, err := dynamic.NewForConfig(config)
			if err != nil {
				log.Fatal(err)
			}

			res, err := dclient.Resource(mapping.Resource).Namespace(namespace).Create(context.TODO(), &unstruct, metav1.CreateOptions{})
			if err != nil {
				log.Fatal(err)
			}
			fmt.Println(res, "=============")
		}
	}
}

本文参考自https://blog.dianduidian.com/post/kubernetes-client-go%E5%AE%9E%E7%8E%B0yaml%E5%88%9B%E5%BB%BAdeployment/