block-docker-container

blockingreader.go

package main

import (
	"fmt"
	"io"
	"os"

	"github.com/fsouza/go-dockerclient"
)

func main() {
	_, outwr := io.Pipe()
	_, errwr := io.Pipe()

	client, err := docker.NewClientFromEnv()
	if err != nil {
		fmt.Printf("Error connecting to Docker!: %s\n", err.Error())
		os.Exit(1)
	}

	fmt.Printf("Attaching to: %s\n", os.Args[1])

	err = client.AttachToContainer(docker.AttachToContainerOptions{
		Container:    os.Args[1],
		OutputStream: outwr,
		ErrorStream:  errwr,
		Stdin:        false,
		Stdout:       true,
		Stderr:       true,
		Stream:       true,
		Success:      make(chan struct{}),
	})

	if err != nil {
		fmt.Printf("Error attaching to container!: %s\n", err.Error())
		os.Exit(1)
	}

	for {}
}

This code will totally lock up the Docker container to which it is attached on Docker 1.10 or later. Any client can do this.