diff --git a/_modules/novav21/services.py b/_modules/novav21/services.py
new file mode 100644
index 0000000..f5093a1
--- /dev/null
+++ b/_modules/novav21/services.py
@@ -0,0 +1,72 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import common
+import six.moves.urllib.parse as urllib_parse
+import time
+from salt.exceptions import CommandExecutionError
+
+# Function alias to not shadow built-ins
+__func_alias__ = {
+    'list_': 'list'
+}
+
+
+@common.function_descriptor('find', 'Compute services', 'services')
+@common.send('get')
+def list_(*args, **kwargs):
+    """Return list of nova services."""
+    url = '/os-services?{}'.format(urllib_parse.urlencode(kwargs))
+    return url, {}
+
+
+@common.function_descriptor('update', 'Compute service', 'service')
+@common.send('put')
+def update(host, service, action, **kwargs):
+    """Enable/Disable nova service"""
+    if kwargs.get('disabled_reason') and action == 'disable':
+      url = '/os-services/disable-log-reason'
+      req = {"host": host, "binary": service, "disabled_reason": kwargs['disabled_reason']}
+    else:
+      url = '/os-services/%s' % action
+      req = {"host": host, "binary": service}
+    return url, {"json": req}
+
+
+def wait_for_services(cloud_name, host=None, service=None, admin_up_only=True, retries=18, timeout=10, **kwargs):
+    """Ensure the service is up and running on specified host.
+
+    :param host:           name of a host where service is running
+    :param admin_up_only:  do not check status for admin disabled service
+    :param service:        name of the service (by default nova-compute)
+    :param timeout:        number of seconds to wait before retries
+    :param retries:        number of retries
+    """
+    kwargs = {}
+    if host is not None:
+        kwargs['host'] = host
+    if service is not None:
+        kwargs['service'] = service
+
+    for i in range(retries):
+        services = list_(cloud_name=cloud_name, **kwargs)['body'].get('services')
+
+        if admin_up_only:
+            down_services = [s for s in services if (not service or s['binary'] == service) and s['status'] == 'enabled' and s['state'] == 'down']
+        else:
+            down_services = [s for s in services if (not service or s['binary'] == service) and s['state'] == 'down']
+
+        if len(down_services) == 0:
+            return 'Compute services with admin_up_only=%s are up or disabled administratively' % (admin_up_only)
+        time.sleep(timeout)
+
+    raise CommandExecutionError("Compute services {} are still down or disabled".format(down_services))