Create and manage services and service users
The Identity Service enables you to define services, as
follows:
Service catalog template. The Identity Service acts
as a service catalog of endpoints for other OpenStack
services. The
etc/default_catalog.templates
template file defines the endpoints for services. When
the Identity Service uses a template file back end,
any changes that are made to the endpoints are cached.
These changes do not persist when you restart the
service or reboot the machine.
A SQL back end for the catalog service. When the
Identity Service is online, you must add the services
to the catalog. When you deploy a system for
production, use the SQL back end.
The auth_token middleware supports the
use of either a shared secret or users for each
service.
To authenticate users against the Identity Service, you must
create a service user for each OpenStack service. For example,
create a service user for the Compute, Block Storage, and
Networking services.
To configure the OpenStack services with service users,
create a project for all services and create users for each
service. Assign the admin role to each service user and
project pair. This role enables users to validate tokens and
authenticate and authorize other user requests.
Create a service
List the available services:
$ keystone service-list
+----------------------------------+----------+----------+---------------------------+
| id | name | type | description |
+----------------------------------+----------+----------+---------------------------+
| 9816f1faaa7c4842b90fb4821cd09223 | cinder | volume | Cinder Volume Service |
| da8cf9f8546b4a428c43d5e032fe4afc | ec2 | ec2 | EC2 Compatibility Layer |
| 5f105eeb55924b7290c8675ad7e294ae | glance | image | Glance Image Service |
| dcaa566e912e4c0e900dc86804e3dde0 | keystone | identity | Keystone Identity Service |
| 4a715cfbc3664e9ebf388534ff2be76a | nova | compute | Nova Compute Service |
| 6feb2e0b98874d88bee221974770e372 | s3 | s3 | S3 |
+----------------------------------+----------+----------+---------------------------+
To create a service, run this command:
$ keystone service-create --name service_name --type service_type --description service_description
The arguments are:
service_name.
The unique name of the new service.
service_type.
The service type, such as
identity,
compute,
network,
image,
object-store or any other
service identifier string.
service_description.
The description of the service.
For example, to create a
swift service of type
object-store, run this
command:
$ keystone service-create --name swift --type object-store --description "object store service"
+-------------+----------------------------------+
| Property | Value |
+-------------+----------------------------------+
| description | object store service |
| enabled | True |
| id | 84c23f4b942c44c38b9c42c5e517cd9a |
| name | swift |
| type | object-store |
+-------------+----------------------------------+
To get details for a service, run this
command:
$ keystone service-get service_ID
For example:
$ keystone service-get 84c23f4b942c44c38b9c42c5e517cd9a
+-------------+----------------------------------+
| Property | Value |
+-------------+----------------------------------+
| description | object store service |
| enabled | True |
| id | 84c23f4b942c44c38b9c42c5e517cd9a |
| name | swift |
| type | object-store |
+-------------+----------------------------------+
Create service users
Create a project for the service users.
Typically, this project is named
service, but choose any
name you like:
$ keystone tenant-create --name service
The output shows the ID for the project.
Make a note of this ID. You need it to create
service users and assign roles.
+-------------+----------------------------------+
| Property | Value |
+-------------+----------------------------------+
| description | |
| enabled | True |
| id | 3e9f3f5399624b2db548d7f871bd5322 |
| name | service |
+-------------+----------------------------------+
Create service users for the relevant services
for your deployment.
To assign the admin role to the service
user-project pairs, run this command to get the ID
of the admin role:
$ keystone role-list
+----------------------------------+---------------+
| id | name |
+----------------------------------+---------------+
| 71ccc37d41c8491c975ae72676db687f | Member |
| 149f50a1fe684bfa88dae76a48d26ef7 | ResellerAdmin |
| 9fe2ff9ee4384b1894a90878d3e92bab | _member_ |
| 6ecf391421604da985db2f141e46a7c8 | admin |
| deb4fffd123c4d02a907c2c74559dccf | anotherrole |
| bef1f95537914b1295da6aa038ef4de6 | new-role |
+----------------------------------+---------------+
Assign the admin role to the user-project
pair:
$ keystone user-role-add --user SERVICE_USER_ID --role ADMIN_ROLE_ID --tenant SERVICE_PROJECT_ID
Delete a service
To delete a specified service, specify its ID:
$ keystone service-delete SERVICE_ID