car_http_port       HTTP proxy port on your local machine.
car_log_folder      Folder where mod_jk logs are stored (volume).
car_target_host     Targeted server that exposes the AJP listener. 
car_target_port     AJP port of the targeted server. Most of the times 8009 (the default) is what you want.
car_local_uid       UID of the Apache user.
