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Chapter 13. Configuring RBAC policies
13.1. Overview of RBAC policies
Role-based access control (RBAC) policies in OpenStack Networking allow granular control over shared neutron networks. OpenStack Networking uses a RBAC table to control sharing of neutron networks among tenants, allowing an administrator to control which tenants are granted permission to attach instances to a network.
As a result, cloud administrators can remove the ability for some tenants to create networks and can instead allow them to attach to pre-existing networks that correspond to their project.
13.2. Creating RBAC policies
This example procedure demonstrates how to use a role-based access control (RBAC) policy to grant a project access to a shared network.
View the list of available networks:
# openstack network list +--------------------------------------+-------------+-------------------------------------------------------+ | id | name | subnets | +--------------------------------------+-------------+-------------------------------------------------------+ | fa9bb72f-b81a-4572-9c7f-7237e5fcabd3 | web-servers | 20512ffe-ad56-4bb4-b064-2cb18fecc923 192.168.200.0/24 | | bcc16b34-e33e-445b-9fde-dd491817a48a | private | 7fe4a05a-4b81-4a59-8c47-82c965b0e050 10.0.0.0/24 | | 9b2f4feb-fee8-43da-bb99-032e4aaf3f85 | public | 2318dc3b-cff0-43fc-9489-7d4cf48aaab9 172.24.4.224/28 | +--------------------------------------+-------------+-------------------------------------------------------+
View the list of projects:
# openstack project list +----------------------------------+----------+ | ID | Name | +----------------------------------+----------+ | 4b0b98f8c6c040f38ba4f7146e8680f5 | auditors | | 519e6344f82e4c079c8e2eabb690023b | services | | 80bf5732752a41128e612fe615c886c6 | demo | | 98a2f53c20ce4d50a40dac4a38016c69 | admin | +----------------------------------+----------+
Create a RBAC entry for the
web-serversnetwork that grants access to the auditors project (4b0b98f8c6c040f38ba4f7146e8680f5):# openstack network rbac create --type network --target-project 4b0b98f8c6c040f38ba4f7146e8680f5 --action access_as_shared web-servers Created a new rbac_policy: +----------------+--------------------------------------+ | Field | Value | +----------------+--------------------------------------+ | action | access_as_shared | | id | 314004d0-2261-4d5e-bda7-0181fcf40709 | | object_id | fa9bb72f-b81a-4572-9c7f-7237e5fcabd3 | | object_type | network | | target_project | 4b0b98f8c6c040f38ba4f7146e8680f5 | | project_id | 98a2f53c20ce4d50a40dac4a38016c69 | +----------------+--------------------------------------+
As a result, users in the auditors project can connect instances to the web-servers network.
13.3. Reviewing RBAC policies
Run the
openstack network rbac listcommand to retrieve the ID of your existing role-based access control (RBAC) policies:# openstack network rbac list +--------------------------------------+-------------+--------------------------------------+ | id | object_type | object_id | +--------------------------------------+-------------+--------------------------------------+ | 314004d0-2261-4d5e-bda7-0181fcf40709 | network | fa9bb72f-b81a-4572-9c7f-7237e5fcabd3 | | bbab1cf9-edc5-47f9-aee3-a413bd582c0a | network | 9b2f4feb-fee8-43da-bb99-032e4aaf3f85 | +--------------------------------------+-------------+--------------------------------------+
Run the
openstack network rbac-showcommand to view the details of a specific RBAC entry:# openstack network rbac show 314004d0-2261-4d5e-bda7-0181fcf40709 +----------------+--------------------------------------+ | Field | Value | +----------------+--------------------------------------+ | action | access_as_shared | | id | 314004d0-2261-4d5e-bda7-0181fcf40709 | | object_id | fa9bb72f-b81a-4572-9c7f-7237e5fcabd3 | | object_type | network | | target_project | 4b0b98f8c6c040f38ba4f7146e8680f5 | | project_id | 98a2f53c20ce4d50a40dac4a38016c69 | +----------------+--------------------------------------+
13.4. Deleting RBAC policies
Run the
openstack network rbac listcommand to retrieve the ID of your existing role-based access control (RBAC) policies:# openstack network rbac list +--------------------------------------+-------------+--------------------------------------+ | id | object_type | object_id | +--------------------------------------+-------------+--------------------------------------+ | 314004d0-2261-4d5e-bda7-0181fcf40709 | network | fa9bb72f-b81a-4572-9c7f-7237e5fcabd3 | | bbab1cf9-edc5-47f9-aee3-a413bd582c0a | network | 9b2f4feb-fee8-43da-bb99-032e4aaf3f85 | +--------------------------------------+-------------+--------------------------------------+
Run the
openstack network rbac deletecommand to delete the RBAC, using the ID of the RBAC that you want to delete:# openstack network rbac delete 314004d0-2261-4d5e-bda7-0181fcf40709 Deleted rbac_policy: 314004d0-2261-4d5e-bda7-0181fcf40709
13.5. Granting RBAC policy access for external networks
You can grant role-based access control (RBAC) policy access to external networks (networks with gateway interfaces attached) using the --action access_as_external parameter.
Complete the steps in the following example procedure to create a RBAC for the web-servers network and grant access to the engineering project (c717f263785d4679b16a122516247deb):
Create a new RBAC policy using the
--action access_as_externaloption:# openstack network rbac create --type network --target-project c717f263785d4679b16a122516247deb --action access_as_external web-servers Created a new rbac_policy: +----------------+--------------------------------------+ | Field | Value | +----------------+--------------------------------------+ | action | access_as_external | | id | ddef112a-c092-4ac1-8914-c714a3d3ba08 | | object_id | 6e437ff0-d20f-4483-b627-c3749399bdca | | object_type | network | | target_project | c717f263785d4679b16a122516247deb | | project_id | c717f263785d4679b16a122516247deb | +----------------+--------------------------------------+
As a result, users in the engineering project are able to view the network or connect instances to it:
$ openstack network list +--------------------------------------+-------------+------------------------------------------------------+ | id | name | subnets | +--------------------------------------+-------------+------------------------------------------------------+ | 6e437ff0-d20f-4483-b627-c3749399bdca | web-servers | fa273245-1eff-4830-b40c-57eaeac9b904 192.168.10.0/24 | +--------------------------------------+-------------+------------------------------------------------------+
