aanand

func randomHexString(length int) (string, error) {
	chars := "01234567890abcdef"
	bytes := make([]byte, length)
	for idx, _ := range bytes {
		num, err := rand.Int(rand.Reader, big.NewInt(int64(len(chars))))
		if err != nil {
			return "", err
		}
		bytes[idx] = chars[num.Int64()]
	}

aanand

$ curl 'http://localhost:4243/v1.10/version'
{"Arch":"amd64","GitCommit":3600720,"GoVersion":"go1.2.1","KernelVersion":"3.8.0-29-generic","Os":"linux","Version":"0.9.1"}


$ curl --no-buffer -X POST 'http://localhost:4243/v1.10/images/create?fromImage=ubuntu&tag='
{"status":"Pulling repository ubuntu"}
{"status":"Pulling image (raring) from ubuntu","progressDetail":{},"id":"eb601b8965b8"}{"status":"Pulling image (raring) from ubuntu, endpoint: https://cdn-registry-1.docker.io/v1/","progressDetail":{},"id":"eb601b8965b8"}{"status":"Pulling image (lucid) from ubuntu","progressDetail":{},"id":"9cc9ea5ea540"}{"status":"Pulling image (lucid) from ubuntu, endpoint: https://cdn-registry-1.docker.io/v1/","progressDetail":{},"id":"9cc9ea5ea540"}{"status":"Pulling image (saucy) from ubuntu","progressDetail":{},"id":"9f676bd305a4"}{"status":"Pulling image (saucy) from ubuntu, endpoint: https://cdn-registry-1.docker.io/v1/","progressDetail":{},"id":"9f676bd305a4"}{"status":"Pulling image (precise) from ubuntu","progressD

aanand

$ cat fig.yml
dckr:
  image: ubuntu
  command: ls -l /
  volumes:
    - /var/run/docker.sock:/docker.sock

$ fig run dckr bash
root@dac750a9bcb3:/# apt-get install -y netcat > /dev/null
root@dac750a9bcb3:/# nc -U /docker.sock

aanand

$ cat fig.yml
dckr:
  image: ubuntu
  command: ls /
  volumes:
    - /var/run/docker.sock:/docker.sock

$ fig up
Creating figldleworktest_dckr_1...
Attaching to figldleworktest_dckr_1

aanand

$ cat fig.yml
web:
  build: ./web
  command: find .
  ports:
    - 3000:3000
$ fig up
Recreating koafig_web_1...
Attaching to koafig_web_1
koafig_web_1 | .

aanand

$ cat fig.yml
web:
  build: ./web
  command: npm ls
  ports:
    - 3000:3000
$ fig up
Recreating koafig_web_1...
Attaching to koafig_web_1
koafig_web_1 | web@0.0.0 /code

aanand

FROM ubuntu

ADD foo.txt /foo.txt

aanand

BADMAS 
PADMAS 
BEDMAS 
PEDMAS 
BIDMAS 
PIDMAS 
BODMAS 
PODMAS 
BUDMAS 
PUDMAS 

aanand

When starting and attaching to a container with a pseudo-tty, the initial bash prompt will only appear if the 'attach' request comes very quickly after the 'start' request (<0.1 seconds, in my tests).

Note how in the first run (attach immediately after starting), a chunk is received containing the prompt, but in the second run (start, then sleep 1s, then attach), it hangs after receiving the response headers.

This is an issue when trying to run a bash container from a Docker client that is geographically distant from the Docker server - the prompt doesn't appear, and you have to hit Enter to get one. From a UX standpoint, it appears as if Docker is simply hanging, which is pretty frustrating!

aanand

# Normal run, without -d.
# Container prompt appears immediately; after exiting, system prompt appears on new line.

$ docker run -i -t ubuntu bash
root@0b3fa3041e3f:/# exit
exit
$

# Now run with -d and *then* attach.
# Container prompt doesn't appear until I hit Enter; after exiting, system prompt appears on same line.