我的查詢與標題差不多,我有一個本地檔案file.txt
,我想將其複製到pod1
的容器container1
中。
如果我使用 kubectl 來執行此操作,適當的命令是:
kubectl cp file.txt pod1:file.txt -c container1
但是,如何使用 kubectl 的 go 用戶端來實作呢?
我嘗試了兩種方法,但都不行:
import ( "fmt" "context" "log" "os" "path/filepath" g "github.com/sdslabs/katana/configs" v1 "k8s.io/api/core/v1" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" "k8s.io/apimachinery/pkg/labels" "k8s.io/client-go/kubernetes" "k8s.io/client-go/rest" "k8s.io/client-go/tools/clientcmd" //"k8s.io/kubectl/pkg/cmd/exec" ) func copyintopod(namespace string, podname string, containername string, srcpath string, dstpath string) { // create a kubernetes client config, err := getkubeconfig() if err != nil { log.fatal(err) } client, err := kubernetes.newforconfig(config) if err != nil { log.fatal(err) } // build the command to execute cmd := []string{"cp", srcpath, dstpath} // use the podexecoptions struct to specify the options for the exec request options := v1.podexecoptions{ container: containername, command: cmd, stdin: false, stdout: true, stderr: true, tty: false, } log.println("options set!") // use the corev1api.exec method to execute the command inside the container req := client.corev1().restclient().post(). namespace(namespace). name(podname). resource("pods"). subresource("exec"). versionedparams(&options, metav1.parametercodec) log.println("request generated") exec, err := req.stream(context.todo()) if err != nil { log.fatal(err) } defer exec.close() // read the response from the exec command var result []byte if _, err := exec.read(result); err != nil { log.fatal(err) } fmt.println("file copied successfully!") }
這給了我一個錯誤訊息:
no 類型已在方案「pkg/runtime/scheme.go:100」
中為 v1.podexecoptions 類型註冊
我無法弄清楚,所以我嘗試了另一種方法:
type PodExec struct { RestConfig *rest.Config *kubernetes.Clientset } func NewPodExec(config *rest.Config, clientset *kubernetes.Clientset) *PodExec { config.APIPath = "/api" // Make sure we target /api and not just / config.GroupVersion = &schema.GroupVersion{Version: "v1"} // this targets the core api groups so the url path will be /api/v1 config.NegotiatedSerializer = serializer.WithoutConversionCodecFactory{CodecFactory: scheme.Codecs} return &PodExec{ RestConfig: config, Clientset: clientset, } } func (p *PodExec) PodCopyFile(src string, dst string, containername string, podNamespace string) (*bytes.Buffer, *bytes.Buffer, *bytes.Buffer, error) { ioStreams, in, out, errOut := genericclioptions.NewTestIOStreams() copyOptions := cp.NewCopyOptions(ioStreams) copyOptions.Clientset = p.Clientset copyOptions.ClientConfig = p.RestConfig copyOptions.Container = containername copyOptions.Namespace = podNamespace err := copyOptions.Run() if err != nil { return nil, nil, nil, fmt.Errorf("could not run copy operation: %v", err) } return in, out, errOut, nil }
但是,copyoptions.run()
指令存在一些問題,它嘗試在copyoptions內尋找o.args[0]和o.args[0]
,但o
未導入,因此無法導入進行修改。
上下文:https://pkg.go.dev/k8s.io/kubectl/pkg/cmd/cp#copyoptions.run
所以,現在我真的很迷失和困惑。任何幫助,將不勝感激。謝謝。
編輯:我確實想到了一個可行的方法,我們可以直接呼叫cmd.exec()
並直接運行kubectl cp
命令,但看起來有點老套,我不確定它是否有效,有什麼想法嗎?
這就是我最終成功做到這一點的方法:
package main import ( "context" "fmt" "os" "path/filepath" "k8s.io/client-go/kubernetes" "k8s.io/client-go/kubernetes/scheme" corev1 "k8s.io/api/core/v1" "k8s.io/client-go/tools/clientcmd" "k8s.io/client-go/util/homedir" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" "k8s.io/client-go/tools/remotecommand" ) func CopyIntoPod(podName string, namespace string, containerName string, srcPath string, dstPath string) { // Get the default kubeconfig file kubeConfig := filepath.Join(homedir.HomeDir(), ".kube", "config") // Create a config object using the kubeconfig file config, err := clientcmd.BuildConfigFromFlags("", kubeConfig) if err != nil { fmt.Printf("Error creating config: %s\n", err) return } // Create a Kubernetes client client, err := kubernetes.NewForConfig(config) if err != nil { fmt.Printf("Error creating client: %s\n", err) return } // Open the file to copy localFile, err := os.Open(srcPath) if err != nil { fmt.Printf("Error opening local file: %s\n", err) return } defer localFile.Close() pod, err := client.CoreV1().Pods(namespace).Get(context.TODO(), podName, metav1.GetOptions{}) if err != nil { fmt.Printf("Error getting pod: %s\n", err) return } // Find the container in the pod var container *corev1.Container for _, c := range pod.Spec.Containers { if c.Name == containerName { container = &c break } } if container == nil { fmt.Printf("Container not found in pod\n") return } // Create a stream to the container req := client.CoreV1().RESTClient().Post(). Resource("pods"). Name(podName). Namespace(namespace). SubResource("exec"). Param("container", containerName) req.VersionedParams(&corev1.PodExecOptions{ Container: containerName, Command: []string{"bash", "-c", "cat > " + dstPath}, Stdin: true, Stdout: true, Stderr: true, }, scheme.ParameterCodec) exec, err := remotecommand.NewSPDYExecutor(config, "POST", req.URL()) if err != nil { fmt.Printf("Error creating executor: %s\n", err) return } // Create a stream to the container err = exec.StreamWithContext(context.TODO(), remotecommand.StreamOptions{ Stdin: localFile, Stdout: os.Stdout, Stderr: os.Stderr, Tty: false, }) if err != nil { fmt.Printf("Error streaming: %s\n", err) return } fmt.Println("File copied successfully") }
以上是如何使用 Go 用戶端將本機檔案複製到 minikube 叢集中的 pod 容器?的詳細內容。更多資訊請關注PHP中文網其他相關文章!