0261a73482
* file naming
* service name - to follow official service names
* heading - for inclusion:
http://docs.openstack.org/mitaka/install-guide-ubuntu/keystone.html
Change-Id: Ifb65971526c2914bf8fc16a10fdafd1c864c38fa
42 lines
1.8 KiB
ReStructuredText
42 lines
1.8 KiB
ReStructuredText
=========================
|
|
Identity service overview
|
|
=========================
|
|
|
|
The OpenStack :term:`Identity service` provides a single point of
|
|
integration for managing authentication, authorization, and service catalog
|
|
services. Other OpenStack services use the Identity service as a common
|
|
unified API. Additionally, services that provide information about users
|
|
but that are not included in OpenStack (such as LDAP services) can be
|
|
integrated into a pre-existing infrastructure.
|
|
|
|
In order to benefit from the Identity service, other OpenStack services need to
|
|
collaborate with it. When an OpenStack service receives a request from a user,
|
|
it checks with the Identity service whether the user is authorized to make the
|
|
request.
|
|
|
|
The Identity service contains these components:
|
|
|
|
Server
|
|
A centralized server provides authentication and authorization
|
|
services using a RESTful interface.
|
|
|
|
Drivers
|
|
Drivers or a service back end are integrated to the centralized
|
|
server. They are used for accessing identity information in
|
|
repositories external to OpenStack, and may already exist in
|
|
the infrastructure where OpenStack is deployed (for example, SQL
|
|
databases or LDAP servers).
|
|
|
|
Modules
|
|
Middleware modules run in the address space of the OpenStack
|
|
component that is using the Identity service. These modules
|
|
intercept service requests, extract user credentials, and send them
|
|
to the centralized server for authorization. The integration between
|
|
the middleware modules and OpenStack components uses the Python Web
|
|
Server Gateway Interface.
|
|
|
|
When installing OpenStack Identity service, you must register each
|
|
service in your OpenStack installation. Identity service can then track
|
|
which OpenStack services are installed, and where they are located on
|
|
the network.
|