Description of policy configuration options

Configuration option = Default value	Description
[DEFAULT]
allow_instance_snapshots = True	(BoolOpt) Permit instance snapshot operations.
allow_migrate_to_same_host = False	(BoolOpt) Allow migrate machine to the same host. Useful when testing in single-host environments.
allow_resize_to_same_host = False	(BoolOpt) Allow destination machine to match source for resize. Useful when testing in single-host environments.
max_age = 0	(IntOpt) Number of seconds between subsequent usage refreshes
max_local_block_devices = 3	(IntOpt) Maximum number of devices that will result in a local image being created on the hypervisor node. Setting this to 0 means nova will allow only boot from volume. A negative number means unlimited.
osapi_compute_unique_server_name_scope =	(StrOpt) When set, compute API will consider duplicate hostnames invalid within the specified scope, regardless of case. Should be empty, "project" or "global".
osapi_max_limit = 1000	(IntOpt) The maximum number of items returned in a single response from a collection resource
osapi_max_request_body_size = 114688	(IntOpt) The maximum body size per each osapi request(bytes)
password_length = 12	(IntOpt) Length of generated instance admin passwords
policy_default_rule = default	(StrOpt) Default rule. Enforced when a requested rule is not found.
policy_file = policy.json	(StrOpt) The JSON file that defines policies.
reservation_expire = 86400	(IntOpt) Number of seconds until a reservation expires
resize_fs_using_block_device = False	(BoolOpt) Attempt to resize the filesystem by accessing the image over a block device. This is done by the host and may not be necessary if the image contains a recent version of cloud-init. Possible mechanisms require the nbd driver (for qcow and raw), or loop (for raw).
until_refresh = 0	(IntOpt) Count of reservations until usage is refreshed