The static configuration for nova lives in two main files:
policy.yaml. These are described below. For a bigger picture view on
configuring nova to solve specific problems, refer to the Nova Admin
Nova, like most OpenStack projects, uses INI-style configuration files to
configure various services and utilities. This functionality is provided by the
oslo.config project. oslo.config supports loading configuration from both
individual configuration files and a directory of configuration files. By
default, nova will search the below directories for two config files -
prog corresponds to the name of
the service or utility being configured such as nova-compute - and
two config directories -
Where a matching file is found, all other directories will be skipped.
This behavior can be overridden by using the
--config-dir options provided for each executable.
More information on how you can use the configuration options to configure services and what configuration options are available can be found below.
Configuration Guide: Detailed configuration guides for various parts of your Nova system. Helpful reference for setting up specific hypervisor backends.
Config Reference: A complete reference of all configuration options available in the
Sample Config File: A sample config file with inline documentation.
Nova, like most OpenStack projects, uses a policy language to restrict
permissions on REST API actions. This functionality is provided by the
oslo.policy project. oslo.policy supports loading policy configuration
from both an individual configuration file, which defaults to
and one or more directories of configuration files, which defaults to
policy.d. These must be located in the same directory as the
file(s). This behavior can be overridden by setting the
oslo_policy.policy_dirs configuration options.
More information on how nova’s policy configuration works and about what policies are available can be found below.
Policy Concepts: Starting in the Ussuri release, Nova API policy defines new default roles with system scope capabilities. These new changes improve the security level and manageability of Nova API as they are richer in terms of handling access at system and project level token with ‘Read’ and ‘Write’ roles.
Policy Reference: A complete reference of all policy points in nova and what they impact.
Sample Policy File: A sample nova policy file with inline documentation.
Nova uses flavor extra specs as a way to provide additional information to instances beyond basic information like amount of RAM or disk. This information can range from hints for the scheduler to hypervisor-specific configuration instructions for the instance.
Extra Spec Reference: A complete reference for all extra specs currently recognized and supported by nova.