Add top-level zapp parameter to disable all services/containers auto restart policy

docs/developer/zapp_format.rst

@@ -42,6 +42,13 @@ required, number [0, 1024)
 
 For now this value is unused.
 
+disable_autorestart
+^^^^^^^^^^^^^^^^^^^
+
+optional, boolean
+
+If set to true, disables all kinds of auorestart on all services of this ZApp.
+
 requires_binary
 ^^^^^^^^^^^^^^^
 
@@ -121,6 +128,8 @@ If set to ``false``, Zoe will configure Docker to automatically restart the serv
 
 Please note that at least one service must be set as a monitor for each ZApp.
 
+All autorestart behaviour is disabled if the global parameter ``disable_autorestart`` (see above) is enabled.
+
 total_count
 ^^^^^^^^^^^
 

zoe_lib/applications.py

@@ -150,6 +150,12 @@ def _service_check(data):
         if not hasattr(data['constraints'], '__iter__'):
             raise InvalidApplicationDescription(msg='networks should be an iterable')
 
+    if 'disable_autorestart' in data:
+        try:
+            bool(data['disable_autorestart'])
+        except ValueError:
+            raise InvalidApplicationDescription(msg="disable_autorestart field should be a boolean")
+
 
 def _port_check(data):
     required_keys = ['name', 'protocol', 'port_number', 'is_main_endpoint']

zoe_master/zapp_to_docker.py

@@ -87,7 +87,9 @@ def _spawn_service(execution: Execution, service: Service, env_subst_dict: dict)
         copts.labels['zoe.monitor'] = 'true'
     else:
         copts.labels['zoe.monitor'] = 'false'
-    copts.restart = not service.description['monitor']  # Monitor containers should not restart
+
+    if 'disable_autorestart' in execution.description and execution.description['disable_autorestart']:
+        copts.restart = not service.description['monitor']  # Monitor containers should not restart
 
     _gen_environment(service, env_subst_dict, copts)