Equivalent of "docker run -it $image bash" in Golang SDK

[esn89]

I've been trying to programmaticaly exec -it into a container without much luck.

I have scoured quite a bit of docs and built something which is able to pull an image and start a container. Where I am having issues is the exec -it part:

Here is my code:

        ctx := context.Background()
	cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
	if err != nil {
		panic(err)
	}
	defer cli.Close()

	token, err := authenticateGcr()
	if err != nil {
		panic(err)
	}

	authConfig := registry.AuthConfig{
		Username: "oauth2accesstoken",
		Password: token.AccessToken,
	}
	encodedJSON, err := json.Marshal(authConfig)
	authStr := base64.URLEncoding.EncodeToString(encodedJSON)

	if err != nil {
		panic(err)
	}
	reader, err := cli.ImagePull(ctx, "myimage", types.ImagePullOptions{RegistryAuth: authStr})
	if err != nil {
		panic(err)
	}
	defer reader.Close()

	resp, err := cli.ContainerCreate(ctx, &container.Config{
		Image:        "myimage",
		AttachStderr: true,
		AttachStdin:  true,
		Tty:          true,
		AttachStdout: true,
		OpenStdin:    true,
	}, nil, nil, nil, "")
	fmt.Println(resp.ID)
	if err != nil {
		panic(err)
	}
	if err := cli.ContainerStart(ctx, resp.ID, types.ContainerStartOptions{}); err != nil {
		panic(err)
	}

	statusCh, errCh := cli.ContainerWait(ctx, resp.ID, container.WaitConditionNotRunning)
	select {
	case err := <-errCh:
		if err != nil {
			panic(err)
		}
	case <-statusCh:
	}
	// See the output on CLI
	config := types.ExecConfig{
		AttachStdin:  true,
		AttachStderr: true,
		AttachStdout: true,
		Cmd:          []string{"bash"},
	}
	IDResp, err := cli.ContainerExecCreate(ctx, resp.ID, config)
	if err != nil {
		log.Panic(err)
	}

	resp2, err := cli.ContainerExecAttach(ctx, IDResp.ID, types.ExecStartCheck{})
	if err != nil {
		log.Panic(err)
	}

	text, _ := resp2.Reader.ReadString('\n')
	log.Print(text)
	io.Copy(os.Stdout, reader)

My issue is that it never really exec -it into the container. I am left with a pseudo-working terminal that hangs:

https://imgur.com/a/434NEFK

I never see the shell nor bash prompt of my container.

[corhere]

Your ExecConfig is equivalent to docker exec -i. You would also need to set Tty: true. Bash does not write a prompt to stdout unless it is started attached to a TTY.