| [DEFAULT] max_server_name_length = 53 | (IntOpt) Maximum length of a server name to be used in nova. | 
| [DEFAULT] template_dir = /etc/heat/templates | (StrOpt) The directory to search for template files. | 
| [clients_aodh] ca_file = None | (StrOpt) Optional CA cert file to use in SSL connections. | 
| [clients_aodh] cert_file = None | (StrOpt) Optional PEM-formatted certificate chain file. | 
| [clients_aodh] endpoint_type = None | (StrOpt) Type of endpoint in Identity service catalog to use for communication with the OpenStack service. | 
| [clients_aodh] insecure = None | (BoolOpt) If set, then the server’s certificate will not be verified. | 
| [clients_aodh] key_file = None | (StrOpt) Optional PEM-formatted file that contains the private key. | 
| [clients_monasca] ca_file = None | (StrOpt) Optional CA cert file to use in SSL connections. | 
| [clients_monasca] cert_file = None | (StrOpt) Optional PEM-formatted certificate chain file. | 
| [clients_monasca] endpoint_type = None | (StrOpt) Type of endpoint in Identity service catalog to use for communication with the OpenStack service. | 
| [clients_monasca] insecure = None | (BoolOpt) If set, then the server’s certificate will not be verified. | 
| [clients_monasca] key_file = None | (StrOpt) Optional PEM-formatted file that contains the private key. | 
| [trustee] auth_type = None | (Opt) Authentication type to load | 
| [volumes] backups_enabled = True | (BoolOpt) Indicate if cinder-backup service is enabled. This is a temporary workaround until cinder-backup service becomes discoverable, see LP#1334856. | 
| [yaql] limit_iterators = 200 | (IntOpt) The maximum number of elements in collection expression can take for its evaluation. | 
| [yaql] memory_quota = 10000 | (IntOpt) The maximum size of memory in bytes that expression can take for its evaluation. |