Table 7.18. New options
        | Option = default value | 
        (Type) Help string | 
      
      | [DEFAULT] cluster_operation_trust_expiration_hours = 24 | 
      (IntOpt) Defines the period of time (in hours) after which trusts created to allow sahara to create or scale a cluster will expire. Note that this value should be significantly larger than the value of the cleanup_time_for_incomplete_clusters configuration key if use of the cluster cleanup feature is desired (the trust must last at least as long as a cluster could validly take to stall in its creation, plus the timeout value set in that key, plus one hour for the period of the cleanup job). | 
    
      | [DEFAULT] default_ntp_server = pool.ntp.org | 
      (StrOpt) Default ntp server for time sync | 
    
      | [DEFAULT] executor_thread_pool_size = 64 | 
      (IntOpt) Size of executor thread pool. | 
    
      | [DEFAULT] heat_stack_tags = data-processing-cluster | 
      (ListOpt) List of tags to be used during operating with stack. | 
    
      | [DEFAULT] host = 127.0.0.1 | 
      (StrOpt) Host to locate redis. | 
    
      | [DEFAULT] password =  | 
      (StrOpt) Password for Redis server (optional). | 
    
      | [DEFAULT] port = 6379 | 
      (IntOpt) Use this port to connect to redis host. | 
    
      | [DEFAULT] rpc_conn_pool_size = 30 | 
      (IntOpt) Size of RPC connection pool. | 
    
      | [DEFAULT] rpc_poll_timeout = 1 | 
      (IntOpt) The default number of seconds that poll should wait. Poll raises timeout exception when timeout expired. | 
    
      | [DEFAULT] rpc_zmq_all_req_rep = True | 
      (BoolOpt) Use REQ/REP pattern for all methods CALL/CAST/FANOUT. | 
    
      | [DEFAULT] rpc_zmq_concurrency = eventlet | 
      (StrOpt) Type of concurrency used. Either "native" or "eventlet" | 
    
      | [DEFAULT] watch_log_file = False | 
      (BoolOpt) (Optional) Uses logging handler designed to watch file system. When log file is moved or removed this handler will open a new log file with specified path instantaneously. It makes sense only if log-file option is specified and Linux platform is used. This option is ignored if log_config_append is set. | 
    
      | [DEFAULT] zmq_use_broker = True | 
      (BoolOpt) Shows whether zmq-messaging uses broker or not. | 
    
      | [cinder] endpoint_type = internalURL | 
      (StrOpt) Endpoint type for cinder client requests | 
    
      | [cors] allow_credentials = True | 
      (BoolOpt) Indicate that the actual request can include user credentials | 
    
      | [cors] allow_headers = Content-Type, Cache-Control, Content-Language, Expires, Last-Modified, Pragma | 
      (ListOpt) Indicate which header field names may be used during the actual request. | 
    
      | [cors] allow_methods = GET, POST, PUT, DELETE, OPTIONS | 
      (ListOpt) Indicate which methods can be used during the actual request. | 
    
      | [cors] allowed_origin = None | 
      (StrOpt) Indicate whether this resource may be shared with the domain received in the requests "origin" header. | 
    
      | [cors] expose_headers = Content-Type, Cache-Control, Content-Language, Expires, Last-Modified, Pragma | 
      (ListOpt) Indicate which headers are safe to expose to the API. Defaults to HTTP Simple Headers. | 
    
      | [cors] max_age = 3600 | 
      (IntOpt) Maximum cache age of CORS preflight requests. | 
    
      | [cors.subdomain] allow_credentials = True | 
      (BoolOpt) Indicate that the actual request can include user credentials | 
    
      | [cors.subdomain] allow_headers = Content-Type, Cache-Control, Content-Language, Expires, Last-Modified, Pragma | 
      (ListOpt) Indicate which header field names may be used during the actual request. | 
    
      | [cors.subdomain] allow_methods = GET, POST, PUT, DELETE, OPTIONS | 
      (ListOpt) Indicate which methods can be used during the actual request. | 
    
      | [cors.subdomain] allowed_origin = None | 
      (StrOpt) Indicate whether this resource may be shared with the domain received in the requests "origin" header. | 
    
      | [cors.subdomain] expose_headers = Content-Type, Cache-Control, Content-Language, Expires, Last-Modified, Pragma | 
      (ListOpt) Indicate which headers are safe to expose to the API. Defaults to HTTP Simple Headers. | 
    
      | [cors.subdomain] max_age = 3600 | 
      (IntOpt) Maximum cache age of CORS preflight requests. | 
    
      | [heat] endpoint_type = internalURL | 
      (StrOpt) Endpoint type for heat client requests | 
    
      | [keystone] endpoint_type = internalURL | 
      (StrOpt) Endpoint type for keystone client requests | 
    
      | [keystone_authtoken] region_name = None | 
      (StrOpt) The region in which the identity server can be found. | 
    
      | [manila] api_insecure = True | 
      (BoolOpt) Allow to perform insecure SSL requests to manila. | 
    
      | [manila] api_version = 1 | 
      (IntOpt) Version of the manila API to use. | 
    
      | [manila] ca_file = None | 
      (StrOpt) Location of ca certificates file to use for manila client requests. | 
    
      | [neutron] endpoint_type = internalURL | 
      (StrOpt) Endpoint type for neutron client requests | 
    
      | [nova] endpoint_type = internalURL | 
      (StrOpt) Endpoint type for nova client requests | 
    
      | [object_store_access] public_identity_ca_file = None | 
      (StrOpt) Location of ca certificate file to use for identity client requests via public endpoint | 
    
      | [object_store_access] public_object_store_ca_file = None | 
      (StrOpt) Location of ca certificate file to use for object-store client requests via public endpoint | 
    
      | [oslo_messaging_amqp] password =  | 
      (StrOpt) Password for message broker authentication | 
    
      | [oslo_messaging_amqp] sasl_config_dir =  | 
      (StrOpt) Path to directory that contains the SASL configuration | 
    
      | [oslo_messaging_amqp] sasl_config_name =  | 
      (StrOpt) Name of configuration file (without .conf suffix) | 
    
      | [oslo_messaging_amqp] sasl_mechanisms =  | 
      (StrOpt) Space separated list of acceptable SASL mechanisms | 
    
      | [oslo_messaging_amqp] username =  | 
      (StrOpt) User name for message broker authentication | 
    
      | [oslo_messaging_qpid] send_single_reply = False | 
      (BoolOpt) Send a single AMQP reply to call message. The current behaviour since oslo-incubator is to send two AMQP replies - first one with the payload, a second one to ensure the other has finished to send the payload. We are going to remove it in the N release, but we must keep backward compatible at the same time. This option provides such compatibility - it defaults to False in Liberty and can be turned on for early adopters with new installations or for testing. This option will be removed in the Mitaka release. | 
    
      | [oslo_messaging_rabbit] kombu_reconnect_timeout = 60 | 
      (IntOpt) How long to wait before considering a reconnect attempt to have failed. This value should not be longer than rpc_response_timeout. | 
    
      | [oslo_messaging_rabbit] send_single_reply = False | 
      (BoolOpt) Send a single AMQP reply to call message. The current behaviour since oslo-incubator is to send two AMQP replies - first one with the payload, a second one to ensure the other has finished to send the payload. We are going to remove it in the N release, but we must keep backward compatible at the same time. This option provides such compatibility - it defaults to False in Liberty and can be turned on for early adopters with new installations or for testing. This option will be removed in the Mitaka release. | 
    
      | [oslo_middleware] secure_proxy_ssl_header = X-Forwarded-Proto | 
      (StrOpt) The HTTP Header that will be used to determine what the original request protocol scheme was, even if it was hidden by an SSL termination proxy. | 
    
      | [retries] retries_number = 5 | 
      (IntOpt) Number of times to retry the request to client before failing | 
    
      | [retries] retry_after = 10 | 
      (IntOpt) Time between the retries to client (in seconds). | 
    
      | [swift] endpoint_type = internalURL | 
      (StrOpt) Endpoint type for swift client requests |