# Compute service
  
  ## Setup
  
  To instantiate a Compute service object, you first need to setup a Rackspace/OpenStack client. To do this, or for more
  information, please consult the [Clients documentation](../Clients.md).
  
  ```php
  $service = $client->computeService();
  ```
  
  If no arguments are provided to the above method, certain values are set to their default values:
  
  |Param|Default value|
  |---|---|
  |`$name`|cloudServersOpenStack|
  |`$region`|DFW|
  |`$urltype`|publicURL|