Ruby docker-api to mount volume - ruby

Question

How do I mount a host volume into docker with the ruby docker-api (https://github.com/swipely/docker-api) on runtime?
Basically, the docker run -v path:path functionality with this gem.

Answer 1

The current README missed the part to explain on how to use the volumes with container. You should be fine to run with below command with container's folder /foo
container = Docker::Container.create('Cmd' => %w[test -d /foo],
'Image' => 'debian:wheezy',
'Volumes' => {'/foo' => {}}
)
If you need mount with local folder, update to Volumes' => {'/foo' => '/local_foo'}
You can refer the test case from:
container_spec.rb

Answer 2

Documentation for docker-api gem states this in its README.md:
require 'docker'
# Create a Container.
container = Docker::Container.create('Cmd' => ['ls'], 'Image' => 'base')
# Attach to the Container. Currently, the below options are the only valid ones.
# By default, :stream, :stdout, and :stderr are set.
container.attach(:stream => true, :stdin => nil, :stdout => true, :stderr => true, :logs => true, :tty => false)
# => [["bin\nboot\ndev\netc\nhome\nlib\nlib64\nmedia\nmnt\nopt\nproc\nroot\nrun\nsbin\nselinux\nsrv\nsys\ntmp\nusr\nvar", []]
# If you wish to stream the attach method, a block may be supplied.
container = Docker::Container.create('Image' => 'base', 'Cmd' => ['find / -name *'])
container.tap(&:start).attach { |stream, chunk| puts "#{stream}: #{chunk}" }
stderr: 2013/10/30 17:16:24 Unable to locate find / -name *
# => [[], ["2013/10/30 17:16:24 Unable to locate find / -name *\n"]]
# If you want to attach to stdin of the container, supply an IO-like object:
container = Docker::Container.create('Image' => 'base', 'Cmd' => ['cat'], 'OpenStdin' => true, 'StdinOnce' => true)
container.tap(&:start).attach(stdin: StringIO.new("foo\nbar\n"))
# => [["foo\nbar\n"], []]
Does this help? Can I ask why are you trying to use docker-api? Can't you just use docker volumes (-v)?

Answer 3

Use Binds:
'Binds' => ['/local/folder:/container/folder']

Answer 4

You need to use both Marcelo's and BMW's answers together to create a container with a working volume:
container = Docker::Container.create('Cmd' => %w[test -d /foo],
'Image' => 'debian:wheezy',
'Volumes' => '/container' => {},
'Binds' => ['/local:/container']
)