The Image Service has two APIs: the user-facing API, and the registry API, which is for internal requests that require access to the database. Both of the APIs currently have two major versions, v1 and v2. It is possible to run either or both versions, by setting appropriate values of enable_v1_api, enable_v2_api, enable_v1_registry and enable_v2_registry. If the v2 API is used, running glance-registry is optional, as v2 of glance-api can connect directly to the database. Tables of all the options used to configure the APIs, including enabling SSL and modifying WSGI settings are found below.