Create and manage services and service users

updated: 2021-10-01 03:16

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/keystone/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.
An 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:

$ openstack service list
+----------------------------------+----------+------------+
| ID                               | Name     | Type       |
+----------------------------------+----------+------------+
| 9816f1faaa7c4842b90fb4821cd09223 | cinder   | volume     |
| 1250f64f31e34dcd9a93d35a075ddbe1 | cinderv2 | volumev2   |
| da8cf9f8546b4a428c43d5e032fe4afc | ec2      | ec2        |
| 5f105eeb55924b7290c8675ad7e294ae | glance   | image      |
| dcaa566e912e4c0e900dc86804e3dde0 | keystone | identity   |
| 4a715cfbc3664e9ebf388534ff2be76a | nova     | compute    |
| 1aed4a6cf7274297ba4026cf5d5e96c5 | novav21  | computev21 |
| bed063c790634c979778551f66c8ede9 | neutron  | network    |
| 6feb2e0b98874d88bee221974770e372 |    s3    |    s3      |
+----------------------------------+----------+------------+

To create a service, run this command:

$ openstack service create --name SERVICE_NAME --description SERVICE_DESCRIPTION SERVICE_TYPE

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:

$ openstack service create --name swift --description "object store service" object-store
+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | object store service             |
| enabled     | True                             |
| id          | 84c23f4b942c44c38b9c42c5e517cd9a |
| name        | swift                            |
| type        | object-store                     |
+-------------+----------------------------------+

To get details for a service, run this command:

$ openstack service show SERVICE_TYPE|SERVICE_NAME|SERVICE_ID

For example:

$ openstack service show object-store
+-------------+----------------------------------+
| Field       | 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:

$ openstack project create service --domain default
+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | None                             |
| domain_id   | e601210181f54843b51b3edff41d4980 |
| enabled     | True                             |
| id          | 3e9f3f5399624b2db548d7f871bd5322 |
| is_domain   | False                            |
| name        | service                          |
| parent_id   | e601210181f54843b51b3edff41d4980 |
+-------------+----------------------------------+

Create service users for the relevant services for your deployment.

Assign the admin role to the user-project pair.

$ openstack role add --project service --user SERVICE_USER_NAME admin
+-------+----------------------------------+
| Field | Value                            |
+-------+----------------------------------+
| id    | 233109e756c1465292f31e7662b429b1 |
| name  | admin                            |
+-------+----------------------------------+

Delete a service¶

To delete a specified service, specify its ID.

$ openstack service delete SERVICE_TYPE|SERVICE_NAME|SERVICE_ID

For example:

$ openstack service delete object-store

updated: 2021-10-01 03:16

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