docker gem error

chef-client-run.sh

Compiling Cookbooks...

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Recipe Compile Error in /home/vagrant/.chef/local-mode-cache/cache/cookbooks/docker/libraries/provider_docker_container.rb
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LoadError
---------
cannot load such file -- docker


Cookbook Trace:
---------------
  /home/vagrant/.chef/local-mode-cache/cache/cookbooks/docker/libraries/provider_docker_container.rb:2:in `<top (required)>'


Relevant File Content:
----------------------
/home/vagrant/.chef/local-mode-cache/cache/cookbooks/docker/libraries/provider_docker_container.rb:

  1:  $LOAD_PATH.unshift *Dir[File.expand_path('../../files/default/vendor/gems/**/lib', __FILE__)]
  2>> require 'docker'
  3:  require 'shellwords'
  4:  require_relative 'helpers_container'
  5:
  6:  class Chef
  7:    class Provider
  8:      class DockerContainer < Chef::Provider::LWRPBase
  9:        # register with the resource resolution system
 10:        provides :docker_container if Chef::Provider.respond_to?(:provides)
 11:


Running handlers:
[2015-09-29T17:01:01+00:00] ERROR: Running exception handlers
Running handlers complete

[2015-09-29T17:01:01+00:00] ERROR: Exception handlers complete
[2015-09-29T17:01:01+00:00] FATAL: Stacktrace dumped to /home/vagrant/.chef/local-mode-cache/cache/chef-stacktrace.out
Chef Client failed. 0 resources updated in 8.059582227 seconds
[2015-09-29T17:01:01+00:00] ERROR: cannot load such file -- docker
[2015-09-29T17:01:02+00:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)