always add service_user section to nova.conf

As of I3629b84d3255a8fe9d8a7cea8c6131d7c40899e8 nova
now requires the service_user section to be configured
to address CVE-2023-2088. This change adds
the service user section to the nova.conf template in
the nova and nova-cell roles.

Related-Bug: #2004555
Signed-off-by: Sven Kieske <kieske@osism.tech>
Change-Id: I2189dafca070accfd8efcd4b8cc4221c6decdc9f
(cherry picked from commit a77ea13ef1)

ansible/roles/cinder/templates/cinder.conf.j2

@@ -109,6 +109,11 @@ max_pool_size = {{ database_max_pool_size }}
 max_retries = -1
 
 [keystone_authtoken]
+# security fix, always validate service tokens
+# see: https://security.openstack.org/ossa/OSSA-2023-003.html
+# and: https://docs.openstack.org/cinder/zed/configuration/block-storage/service-token.html#troubleshooting
+service_token_roles_required = true
+service_token_roles = admin
 www_authenticate_uri = {{ keystone_internal_url }}
 auth_url = {{ keystone_admin_url }}
 auth_type = password

ansible/roles/nova-cell/templates/nova.conf.j2

@@ -258,3 +258,16 @@ track_instance_changes = false
 [pci]
 passthrough_whitelist = {{ nova_pci_passthrough_whitelist | to_json }}
 {% endif %}
+
+[service_user]
+send_service_user_token = true
+auth_url = {{ keystone_internal_url }}
+auth_type = password
+project_domain_id = {{ default_project_domain_id }}
+user_domain_id = {{ default_user_domain_id }}
+project_name = service
+username = {{ nova_keystone_user }}
+password = {{ nova_keystone_password }}
+cafile = {{ openstack_cacert }}
+region_name = {{ openstack_region_name }}
+valid_interfaces = internal

ansible/roles/nova/templates/nova.conf.j2

@@ -202,3 +202,16 @@ auth_endpoint = {{ keystone_internal_url }}
 barbican_endpoint_type = internal
 verify_ssl_path = {{ openstack_cacert }}
 {% endif %}
+
+[service_user]
+send_service_user_token = true
+auth_url = {{ keystone_internal_url }}
+auth_type = password
+project_domain_id = {{ default_project_domain_id }}
+user_domain_id = {{ default_user_domain_id }}
+project_name = service
+username = {{ nova_keystone_user }}
+password = {{ nova_keystone_password }}
+cafile = {{ openstack_cacert }}
+region_name = {{ openstack_region_name }}
+valid_interfaces = internal

releasenotes/notes/cve-2023-2088-51e7e050be2139bf.yaml

@@ -0,0 +1,9 @@
+---
+fixes:
+  - |
+    Configuration of service user tokens for all Nova and Cinder services
+    is now done automatically, to ensure security of block-storage volume
+    data.
+
+    See `LP#[2004555] <https://bugs.launchpad.net/nova/+bug/2004555>`__ for
+    more details.