var pull = require('docker-pull')

pull('ubuntu', function (err) {
  console.log('was pulled?', !err)
})

var p = pull('ubuntu:14.04')

p.on('progress', function () {
  console.log('pulled %d new layers and %d/%d bytes', p.layers, p.transferred, p.length)
})

p.on('end', function () {
  console.log('pull is done')
})

{
  host:     'registry.example.com', // docker registry
  version:  'v2',                   // defaults to 'v1.15'
  username: 'user',                 // defaults to 'anon'
  password: 'pwd',                  // defaults to ''
  email:    '[email protected]'      // no default
}