.. -*- rst -*-

=====
Roles
=====

OpenStack services typically determine whether a user's API request should be
allowed using Role Based Access Control (RBAC). For OpenStack this means the
service compares the roles that user has on the project (as indicated by the
roles in the token), against the roles required for the API in question
(as defined in the service's policy file). A user obtains roles on a project by
having these assigned to them via the Identity service API.

Roles must initially be created as entities via the Identity services API and,
once created, can then be assigned. You can assign roles to a user or group on a
project, including projects owned by other domains. You can also assign roles
to a user or group on a domain, although this is only currently relevant for
using a domain scoped token to execute domain-level Identity service API
requests.

The creation, checking and deletion of role assignments is done with each of
the attributes being specified in the URL. For example to assign a role to a
user on a project::

  PUT /v3/projects/{project_id}/users/{user_id}/roles/{role_id}

You can also list roles assigned to a specified domain, project, or user using
this form of API, however a more generalized API for list assignments is
provided where query parameters are used to filter the set of assignments
returned in the collection. For example:

- List role assignments for the specified user::

    GET /role_assignments?user.id={user_id}

- List role assignments for the specified project::

    GET /role_assignments?scope.project.id={project_id}

Since Identity API v3.6, you can also list all role assignments within a tree of projects,
for example the following would list all role assignments for a specified
project and its sub-projects::

  GET /role_assignments?scope.project.id={project_id}&include_subtree=true

If you specify ``include_subtree=true``, you must also specify the
``scope.project.id``. Otherwise, this call returns the ``Bad Request (400)``
response code.

Each role assignment entity in the collection contains a link to
the assignment that created the entity.

As mentioned earlier, role assignments can be made to a user or a group on a
particular project or domain. A user who is a member of a group that has a
role assignment, will also be treated as having that role assignment by virtue
of their group membership. The *effective* role assignments of a user (on a
given project or domain) therefore consists of any direct assignments they have,
plus any they gain by virtue of membership of groups that also have assignments
on the given project or domain. This set of effective role assignments is what
is placed in the token for reference by services wishing to check policy. You
can list the effective role assignments using the ``effective`` query parameter
at the user, project, and domain level:

- Determine what a user can actually do::

    GET /role_assignments?user.id={user_id}&effective

- Get the equivalent set of role assignments that are included in a
  project-scoped token response::

    GET /role_assignments?user.id={user_id}&scope.project.id={project_id}&effective

When listing in effective mode, since the group assignments have been
effectively expanded out into assignments for each user, the group role
assignment entities themselves are not returned in the collection. However,
in the response, the ``links`` entity section for each assignment gained by
virtue of group membership will contain a URL that enables access to the
membership of the group.

By default only the IDs of entities are returned in collections from the
role_assignment API calls. The names of entities may also be returned,
in addition to the IDs, by using the ``include_names`` query parameter
on any of these calls, for example:

- List role assignments including names::

    GET /role_assignments?include_names


List roles
==========

.. rest_method::  GET /v3/roles

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/roles``

Lists roles.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - name: role_name_query
   - domain_id: domain_id_query

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - links: link_collection
   - roles: roles
   - domain_id: domain_id_response_body
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body

Response Example
----------------

.. literalinclude:: ./samples/admin/roles-list-response.json
   :language: javascript


Create role
===========

.. rest_method::  POST /v3/roles

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/roles``

Creates a role.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 201

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 409

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - role: role
   - name: role_name_create_body
   - domain_id: role_domain_id_request_body

Request Example
---------------

.. literalinclude:: ./samples/admin/role-create-request.json
   :language: javascript

Request Example for Domain Specific Role
----------------------------------------

.. literalinclude:: ./samples/admin/domain-specific-role-create-request.json
   :language: javascript

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - role: role
   - domain_id: domain_id_response_body
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body


Show role details
=================

.. rest_method::  GET /v3/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/role``

Shows details for a role.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - role_id: role_id_path

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - role: role
   - domain_id: domain_id_response_body
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body

Response Example
----------------

.. literalinclude:: ./samples/admin/role-show-response.json
   :language: javascript


Update role
===========

.. rest_method::  PATCH /v3/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/role``

Updates a role.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404
   - 409

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - role_id: role_id_path
   - role: role
   - name: role_name_update_body

Request Example
---------------

.. literalinclude:: ./samples/admin/role-update-request.json
   :language: javascript

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - role: role
   - domain_id: domain_id_response_body
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body

Response Example
----------------

.. literalinclude:: ./samples/admin/role-update-response.json
   :language: javascript


Delete role
===========

.. rest_method::  DELETE /v3/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/role``

Deletes a role.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - role_id: role_id_path


List role assignments for group on domain
=========================================

.. rest_method::  GET /v3/domains/{domain_id}/groups/{group_id}/roles

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/domain_group_roles``

Lists role assignments for a group on a domain.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - domain_id: domain_id_path
   - group_id: group_id_path

Response Example
----------------

.. literalinclude:: ./samples/admin/domain-group-roles-list-response.json
   :language: javascript

The functionality of this request can also be achieved using the generalized
list assignments API::

  GET /role_assignments?group.id={group_id}&scope.domain.id={domain_id}


Assign role to group on domain
==============================

.. rest_method::  PUT /v3/domains/{domain_id}/groups/{group_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/domain_group_role``

Assigns a role to a group on a domain.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404
   - 409

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - domain_id: domain_id_path
   - group_id: group_id_path
   - role_id: role_id_path


Check whether group has role assignment on domain
=================================================

.. rest_method::  HEAD /v3/domains/{domain_id}/groups/{group_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/domain_group_role``

Validates that a group has a role assignment on a domain.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - domain_id: domain_id_path
   - group_id: group_id_path
   - role_id: role_id_path


Unassign role from group on domain
==================================

.. rest_method::  DELETE /v3/domains/{domain_id}/groups/{group_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/domain_group_role``

Unassigns a role from a group on a domain.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - domain_id: domain_id_path
   - group_id: group_id_path
   - role_id: role_id_path


List role assignments for user on domain
========================================

.. rest_method::  GET /v3/domains/{domain_id}/users/{user_id}/roles

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/domain_user_roles``

Lists role assignments for a user on a domain.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - domain_id: domain_id_path
   - user_id: user_id_path

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - roles: roles
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body

Response Example
----------------

.. literalinclude:: ./samples/admin/domain-user-roles-list-response.json
   :language: javascript

The functionality of this request can also be achieved using the generalized
list assignments API::

  GET /role_assignments?user.id={user_id}&scope.domain.id={domain_id}


Assign role to user on domain
=============================

.. rest_method::  PUT /v3/domains/{domain_id}/users/{user_id}/roles/{role_id}

Relationship: ``https://developer.openstack.org/api-ref/identity/v3/index.html#assign-role-to-user-on-domain``

Assigns a role to a user on a domain.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404
   - 409

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - domain_id: domain_id_path
   - user_id: user_id_path
   - role_id: role_id_path


Check whether user has role assignment on domain
================================================

.. rest_method::  HEAD /v3/domains/{domain_id}/users/{user_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/domain_user_role``

Validates that a user has a role assignment on a domain.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - domain_id: domain_id_path
   - user_id: user_id_path
   - role_id: role_id_path


Unassigns role from user on domain
==================================

.. rest_method::  DELETE /v3/domains/{domain_id}/users/{user_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/domain_user_role``

Unassigns a role from a user on a domain.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404
   - 409

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - domain_id: domain_id_path
   - user_id: user_id_path
   - role_id: role_id_path


List role assignments for group on project
==========================================

.. rest_method::  GET /v3/projects/{project_id}/groups/{group_id}/roles

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/project_user_role``

Lists role assignments for a group on a project.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - project_id: project_id_path
   - group_id: group_id_path

Response Example
----------------

.. literalinclude:: ./samples/admin/project-group-roles-list-response.json
   :language: javascript

The functionality of this request can also be achieved using the generalized
list assignments API::

  GET /role_assignments?group.id={group_id}&scope.project.id={project_id}


Assign role to group on project
===============================

.. rest_method::  PUT /v3/projects/{project_id}/groups/{group_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/project_group_role``

Assigns a role to a group on a project.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404
   - 409

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - project_id: project_id_path
   - group_id: group_id_path
   - role_id: role_id_path


Check whether group has role assignment on project
==================================================

.. rest_method::  HEAD /v3/projects/{project_id}/groups/{group_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/project_group_role``

Validates that a group has a role assignment on a project.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - project_id: project_id_path
   - group_id: group_id_path
   - role_id: role_id_path


Unassign role from group on project
===================================

.. rest_method::  DELETE /v3/projects/{project_id}/groups/{group_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/project_group_role``

Unassigns a role from a group on a project.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - project_id: project_id_path
   - group_id: group_id_path
   - role_id: role_id_path


List role assignments for user on project
=========================================

.. rest_method::  GET /v3/projects/{project_id}/users/{user_id}/roles

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/project_user_role``

Lists role assignments for a user on a project.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - project_id: project_id_path
   - user_id: user_id_path

Response Example
----------------

.. literalinclude:: ./samples/admin/project-user-roles-list-response.json
   :language: javascript


Assign role to user on project
==============================

.. rest_method::  PUT /v3/projects/{project_id}/users/{user_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/project_user_role``

Assigns a role to a user on a project.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404
   - 409

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - project_id: project_id_path
   - user_id: user_id_path
   - role_id: role_id_path


Check whether user has role assignment on project
=================================================

.. rest_method::  HEAD /v3/projects/{project_id}/users/{user_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/project_user_role``

Validates that a user has a role on a project.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 201

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - project_id: project_id_path
   - user_id: user_id_path
   - role_id: role_id_path


Unassign role from user on project
==================================

.. rest_method::  DELETE /v3/projects/{project_id}/users/{user_id}/roles/{role_id}

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/project_user_role``

Unassigns a role from a user on a project.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - project_id: project_id_path
   - user_id: user_id_path
   - role_id: role_id_path


List implied (inference) roles for role
=======================================

.. rest_method:: GET /v3/roles/{prior_role_id}/implies

Lists implied (inference) roles for a role.

Relationship:
``https://developer.openstack.org/api-ref/identity/v3/#list-implied-roles-for-role``

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 401
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - prior_role_id: prior_role_id

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - role_inference: role_inference_body
   - prior_role: prior_role_body
   - implies: implies_role_array_body
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body

Response Example
----------------

.. literalinclude:: ./samples/admin/list-implied-roles-for-role-response.json
   :language: javascript


Create role inference rule
==========================

.. rest_method:: PUT /v3/roles/{prior_role_id}/implies/{implies_role_id}

Creates a role inference rule.

Relationship:
``https://developer.openstack.org/api-ref/identity/v3/#create-role-inference-rule``

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 201

.. rest_status_code:: error status.yaml

   - 401
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - prior_role_id: prior_role_id
   - implies_role_id: implies_role_id

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - role_inference: role_inference_body
   - prior_role: prior_role_body
   - implies: implies_role_object_body
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body

Response Example
----------------

.. literalinclude:: ./samples/admin/create-role-inferences-response.json
   :language: javascript


Get role inference rule
=======================

.. rest_method:: GET /v3/roles/{prior_role_id}/implies/{implies_role_id}

Gets a role inference rule.

Relationship:
``https://developer.openstack.org/api-ref/identity/v3/#get-role-inference-rule``

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 401
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - prior_role_id: prior_role_id
   - implies_role_id: implies_role_id

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - role_inference: role_inference_body
   - prior_role: prior_role_body
   - implies: implies_role_object_body
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body

Response Example
----------------

.. literalinclude:: ./samples/admin/get-role-inferences-response.json
   :language: javascript


Confirm role inference rule
===========================

.. rest_method:: HEAD /v3/roles/{prior_role_id}/implies/{implies_role_id}

Checks a role role inference rule.

Relationship:
``https://developer.openstack.org/api-ref/identity/v3/#confirm-role-inference-rule``

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 401
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - prior_role_id: prior_role_id
   - implies_role_id: implies_role_id

Response Example
----------------

Status: 204 No Content


Delete role inference rule
==========================

.. rest_method:: DELETE /v3/roles/{prior_role_id}/implies/{implies_role_id}

Deletes a role inference rule.

Relationship:
``https://developer.openstack.org/api-ref/identity/v3/#delete-role-inference-rule``

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 204

.. rest_status_code:: error status.yaml

   - 401
   - 404

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - prior_role_id: prior_role_id
   - implies_role_id: implies_role_id

Response Example
----------------

Status: 204 No Content


List role assignments
=====================

.. rest_method::  GET /v3/role_assignments

Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/role_assignments``

Lists role assignments.

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 400
   - 401
   - 403

Request Parameters
------------------

.. rest_parameters:: parameters.yaml

   - effective: effective_query
   - include_names: include_names_query
   - include_subtree: include_subtree_query
   - group.id: group_id_query
   - role.id: role_id_query
   - scope.domain.id: scope_domain_id_query
   - scope.project.id: scope_project_id_query
   - user.id: user_id_query

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - role_assignments: role_assignments

Response Example
----------------

.. literalinclude:: ./samples/admin/role-assignments-list-response.json
   :language: javascript


List all role inference rules
=============================

.. rest_method:: GET /v3/role_inferences

Lists all role inference rules.

Relationship:
``https://developer.openstack.org/api-ref/identity/v3/#list-all-role-inference-rules``

Response Codes
--------------

.. rest_status_code:: success status.yaml

   - 200

.. rest_status_code:: error status.yaml

   - 401
   - 404

Response Parameters
-------------------

.. rest_parameters:: parameters.yaml

   - role_inferences: role_inference_array_body
   - prior_role: prior_role_body
   - implies: implies_role_object_body
   - id: role_id_response_body
   - links: link_response_body
   - name: role_name_response_body

Response Example
----------------

.. literalinclude:: ./samples/admin/role-inferences-response.json
   :language: javascript
