Method: Specinfra::Backend::Docker#initialize

Defined in:
lib/specinfra/backend/docker.rb

#initialize(config = {}) ⇒ Docker

Returns a new instance of Docker.

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# File 'lib/specinfra/backend/docker.rb', line 4

def initialize(config = {})
  super

  begin
    require 'docker' unless defined?(::Docker)
  rescue LoadError
    fail "Docker client library is not available. Try installing `docker-api' gem."
  end

  ::Docker.url = get_config(:docker_url)

  if image = get_config(:docker_image)
    @images = []
    @base_image = get_or_pull_image(image)

    create_and_start_container
    ObjectSpace.define_finalizer(self, proc { cleanup_container })
  elsif container = get_config(:docker_container)
    @container = ::Docker::Container.get(container)
  else
    fail 'Please specify docker_image or docker_container.'
  end
end