myrecipe.rb

require 'chef/provisioning/docker_driver'

# Create the hosts
machine_batch 'docker hosts' do
  machine "dockerhost1" do
    recipe "docker"
    attribute %w(docker host), 'tcp://localhost:5555'
  end
  machine "dockerhost2" do
    recipe "docker"
    attribute %w(docker host), 'tcp://localhost:5555'
  end
end

at_converge_time "create docker containers" do
  machine_batch do

    with_docker_host 'dockerhost1' do |chef_server_url|
      with_machine_options(
        convergence_options: { extra_config: "chef_server_url #{chef_server_url.inspect}" },
        image: 'ubuntu'
      )

      machine 'web1' do
        recipe 'mywebapp'
      end
      machine 'web2' do
        recipe 'mywebapp'
      end
    end

    with_docker_host 'dockerhost2' do |chef_server_url|
      with_machine_options convergence_options: { extra_config: "chef_server_url #{chef_server_url.inspect}" }

      machine 'web3' do
        recipe 'mywebapp'
      end
      machine 'web4' do
        recipe 'mywebapp'
      end
    end

  end
end