如何使用Go客户端在Kubernetes Pod中调试并正确执行命令？

package k8s

import (
    "io"

    v1 "k8s.io/api/core/v1"
    "k8s.io/client-go/kubernetes"
    _ "k8s.io/client-go/plugin/pkg/client/auth/gcp" // Auth plugin specific to GKE
    "k8s.io/client-go/rest"
    "k8s.io/client-go/tools/remotecommand"
)

// ExecCmdExample executes a command on a specific pod and waits for the command's output.
func ExecCmdExample(client kubernetes.Interface, podName string,
    command string, stdin io.Reader, stdout io.Writer, stderr io.Writer) error {
    // Use a larger reader buffer size to handle long outputs.
    buf := make([]byte, 10000)

    cmd := []string{
        "sh",
        "-c",
        command,
    }

    options := &v1.PodExecOptions{
        Command: cmd,
        Stdin:   stdin != nil,
        Stdout:  true,
        Stderr:  true,
        TTY:     false,
    }

    req := client.CoreV1().RESTClient().Post().
        Resource("pods").
        Name(podName).
        Namespace("default").
        SubResource("exec").
        VersionedParams(
            options,
            scheme.ParameterCodec,
        )

    exec, err := remotecommand.NewSPDYExecutor(config, "POST", req.URL())
    if err != nil {
        return err
    }

    err = exec.Stream(remotecommand.StreamOptions{
        Stdin:  stdin,
        Stdout: stdout,
        Stderr: stderr,
    })
    
    // Read additional output if necessary.
    if _, err = exec.Read(buf); err != nil {
        return err
    }

    return nil
}