{
  <% if node['docker']['custom_data_block_device'] %>
  "data-root": "<%= node['docker']['custom_data_mount_point'] %>/docker",
  <% end %>
  "default-address-pools": [
    <%= @config['default_address_pools'].map{ |pool| "{\"base\": \"#{pool['base']}\", \"size\": #{pool['size']}}" }.join(',\n') %>
  ]
}