diff --git a/README.rst b/README.rst
index ada83d3..eec572b 100644
--- a/README.rst
+++ b/README.rst
@@ -1210,6 +1210,33 @@
 You can read more about it here:
     https://docs.openstack.org/security-guide/databases/database-access-control.html
 
+Configure nova to use service user tokens:
+========
+Long-running operations such as live migration or snapshot can sometimes overrun the
+expiry of the user token. In such cases, post operations such as cleaning up after a
+live migration can fail when the nova-compute service needs to cleanup resources in
+other services, such as in the block-storage (cinder) or networking (neutron) services.
+
+This patch enables nova to use service user tokens to supplement the regular user token
+used to initiate the operation. The identity service (keystone) will then authenticate
+a request using the service user token if the user token has already expired.
+
+.. code-block:: yaml
+
+   nova:
+     controller:
+     enabled: True
+     ...
+       service_user:
+         enabled: True
+         user_domain_id: default
+         project_domain_id: default
+         project_name: service
+         username: nova
+         password: pswd
+
+
+
 Upgrades
 ========
 
diff --git a/nova/files/ocata/nova-compute.conf.Debian b/nova/files/ocata/nova-compute.conf.Debian
index f6a77be..44bf3f1 100644
--- a/nova/files/ocata/nova-compute.conf.Debian
+++ b/nova/files/ocata/nova-compute.conf.Debian
@@ -9050,6 +9050,24 @@
 #
 # From nova.conf
 #
+{%- if compute.get('service_user', {}).get('enabled', True) %}
+send_service_user_token = True
+auth_type = password
+{%- set _data = {} %}
+{%- do _data.update(compute.get('identity', {})) %}
+{%- do _data.update(compute.get('service_user', {})) %}
+{%- if not _data.port == '5000' %}{% do _data.update({'port': '5000'}) %}{% endif %}
+{%- if 'cacert_file' not in _data.keys() %}{% do _data.update({'cacert_file': compute.cacert_file}) %}{% endif %}
+user_domain_id = {{ _data.get('domain', 'default') }}
+project_domain_id = {{ _data.get('domain', 'default') }}
+project_name = {{ _data.get('tenant', 'service') }}
+username = {{ _data.get('user', 'nova') }}
+password = {{ _data.password }}
+auth_url={{ _data.get('protocol', 'http') }}://{{ _data.host }}:{{ _data.port }}
+  {%- if _data.get('protocol', 'http') == 'https' %}
+cafile={{ _data.cacert_file }}
+  {%- endif %}
+{%- endif %}
 
 #
 # When True, if sending a user token to an REST API, also send a service token.
diff --git a/nova/files/ocata/nova-controller.conf.Debian b/nova/files/ocata/nova-controller.conf.Debian
index 23db54e..b7c38ff 100644
--- a/nova/files/ocata/nova-controller.conf.Debian
+++ b/nova/files/ocata/nova-controller.conf.Debian
@@ -9025,6 +9025,24 @@
 #
 # From nova.conf
 #
+{%- if controller.get('service_user', {}).get('enabled', True) %}
+send_service_user_token = True
+auth_type = password
+{%- set _data = {} %}
+{%- do _data.update(controller.get('identity', {})) %}
+{%- do _data.update(controller.get('service_user', {})) %}
+{%- if not _data.port == '5000' %}{% do _data.update({'port': '5000'}) %}{% endif %}
+{%- if 'cacert_file' not in _data.keys() %}{% do _data.update({'cacert_file': controller.cacert_file}) %}{% endif %}
+user_domain_id = {{ _data.get('domain', 'default') }}
+project_domain_id = {{ _data.get('domain', 'default') }}
+project_name = {{ _data.get('tenant', 'service') }}
+username = {{ _data.get('user', 'nova') }}
+password = {{ _data.password }}
+auth_url={{ _data.get('protocol', 'http') }}://{{ _data.host }}:{{ _data.port }}
+  {%- if _data.get('protocol', 'http') == 'https' %}
+cafile={{ _data.cacert_file }}
+  {%- endif %}
+{%- endif %}
 
 #
 # When True, if sending a user token to an REST API, also send a service token.
diff --git a/nova/files/pike/nova-compute.conf.Debian b/nova/files/pike/nova-compute.conf.Debian
index fdc531d..314bf29 100644
--- a/nova/files/pike/nova-compute.conf.Debian
+++ b/nova/files/pike/nova-compute.conf.Debian
@@ -9252,6 +9252,24 @@
 #
 # From nova.conf
 #
+{%- if compute.get('service_user', {}).get('enabled', True) %}
+send_service_user_token = True
+auth_type = password
+{%- set _data = {} %}
+{%- do _data.update(compute.get('identity', {})) %}
+{%- do _data.update(compute.get('service_user', {})) %}
+{%- if not _data.port == '5000' %}{% do _data.update({'port': '5000'}) %}{% endif %}
+{%- if 'cacert_file' not in _data.keys() %}{% do _data.update({'cacert_file': compute.cacert_file}) %}{% endif %}
+user_domain_id = {{ _data.get('domain', 'default') }}
+project_domain_id = {{ _data.get('domain', 'default') }}
+project_name = {{ _data.get('tenant', 'service') }}
+username = {{ _data.get('user', 'nova') }}
+password = {{ _data.password }}
+auth_url={{ _data.get('protocol', 'http') }}://{{ _data.host }}:{{ _data.port }}
+  {%- if _data.get('protocol', 'http') == 'https' %}
+cafile={{ _data.cacert_file }}
+  {%- endif %}
+{%- endif %}
 
 #
 # When True, if sending a user token to an REST API, also send a service token.
diff --git a/nova/files/pike/nova-controller.conf.Debian b/nova/files/pike/nova-controller.conf.Debian
index 3a4a725..3bdcfd6 100644
--- a/nova/files/pike/nova-controller.conf.Debian
+++ b/nova/files/pike/nova-controller.conf.Debian
@@ -9238,6 +9238,24 @@
 #
 # From nova.conf
 #
+{%- if controller.get('service_user', {}).get('enabled', True) %}
+send_service_user_token = True
+auth_type = password
+{%- set _data = {} %}
+{%- do _data.update(controller.get('identity', {})) %}
+{%- do _data.update(controller.get('service_user', {})) %}
+{%- if not _data.port == '5000' %}{% do _data.update({'port': '5000'}) %}{% endif %}
+{%- if 'cacert_file' not in _data.keys() %}{% do _data.update({'cacert_file': controller.cacert_file}) %}{% endif %}
+user_domain_id = {{ _data.get('domain', 'default') }}
+project_domain_id = {{ _data.get('domain', 'default') }}
+project_name = {{ _data.get('tenant', 'service') }}
+username = {{ _data.get('user', 'nova') }}
+password = {{ _data.password }}
+auth_url={{ _data.get('protocol', 'http') }}://{{ _data.host }}:{{ _data.port }}
+  {%- if _data.get('protocol', 'http') == 'https' %}
+cafile={{ _data.cacert_file }}
+  {%- endif %}
+{%- endif %}
 
 #
 # When True, if sending a user token to an REST API, also send a service token.
diff --git a/nova/files/queens/nova-compute.conf.Debian b/nova/files/queens/nova-compute.conf.Debian
index 22ba3f3..1298a84 100644
--- a/nova/files/queens/nova-compute.conf.Debian
+++ b/nova/files/queens/nova-compute.conf.Debian
@@ -9259,6 +9259,15 @@
 # middleware.
 #  (boolean value)
 #send_service_user_token = false
+{%- if compute.get('service_user', {}).get('enabled', True) %}
+send_service_user_token = True
+{%- set _data = {} %}
+{%- do _data.update(compute.get('identity', {})) %}
+{%- do _data.update(compute.get('service_user', {})) %}
+{%- if not _data.port == '5000' %}{% do _data.update({'port': '5000'}) %}{% endif %}
+{%- if 'cacert_file' not in _data.keys() %}{% do _data.update({'cacert_file': compute.cacert_file}) %}{% endif %}
+{%- include "oslo_templates/files/queens/keystoneauth/_type_"+ _data.get('auth_type','password') +".conf" %}
+{%- else %}
 
 # PEM encoded Certificate Authority to use when verifying HTTPs
 # connections. (string value)
@@ -9342,6 +9351,7 @@
 
 # Tenant Name (string value)
 #tenant_name = <None>
+{%- endif %}
 
 
 [spice]
diff --git a/nova/files/queens/nova-controller.conf.Debian b/nova/files/queens/nova-controller.conf.Debian
index 7ccaf52..0a2758f 100644
--- a/nova/files/queens/nova-controller.conf.Debian
+++ b/nova/files/queens/nova-controller.conf.Debian
@@ -8974,6 +8974,15 @@
 # middleware.
 #  (boolean value)
 #send_service_user_token = false
+{%- if controller.get('service_user', {}).get('enabled', True) %}
+send_service_user_token = True
+{%- set _data = {} %}
+{%- do _data.update(controller.get('identity', {})) %}
+{%- do _data.update(controller.get('service_user', {})) %}
+{%- if not _data.port == '5000' %}{% do _data.update({'port': '5000'}) %}{% endif %}
+{%- if 'cacert_file' not in _data.keys() %}{% do _data.update({'cacert_file': controller.cacert_file}) %}{% endif %}
+{%- include "oslo_templates/files/queens/keystoneauth/_type_"+ _data.get('auth_type','password') +".conf" %}
+{%- else %}
 
 # PEM encoded Certificate Authority to use when verifying HTTPs
 # connections. (string value)
@@ -9057,6 +9066,7 @@
 
 # Tenant Name (string value)
 #tenant_name = <None>
+{%- endif %}
 
 
 [spice]
diff --git a/tests/pillar/compute_cluster_vmware.sls b/tests/pillar/compute_cluster_vmware.sls
index 8953178..27de501 100644
--- a/tests/pillar/compute_cluster_vmware.sls
+++ b/tests/pillar/compute_cluster_vmware.sls
@@ -21,6 +21,13 @@
       user: nova
       password: password
       tenant: service
+      service_user:
+        enabled: True
+        user_domain_id: default
+        project_domain_id: default
+        project_name: service
+        username: nova
+        password: pswd
     logging:
       log_appender: false
       log_handlers:
diff --git a/tests/pillar/control_cluster.sls b/tests/pillar/control_cluster.sls
index e3bf663..97e8e43 100644
--- a/tests/pillar/control_cluster.sls
+++ b/tests/pillar/control_cluster.sls
@@ -32,6 +32,14 @@
       user: nova
       password: password
       tenant: service
+      service_user:
+        enabled: True
+        user_domain_id: default
+        project_domain_id: default
+        project_name: service
+        username: nova
+        password: pswd
+
     logging:
       log_appender: false
       log_handlers: