Include networks in the config_hash.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

compose/network.py

@@ -136,7 +136,7 @@ class ProjectNetworks(object):
         service_networks = {
             network: networks.get(network)
             for service in services
-            for network in service.get('networks', ['default'])
+            for network in get_network_names_for_service(service)
         }
         unused = set(networks) - set(service_networks) - {'default'}
         if unused:
@@ -159,12 +159,15 @@ class ProjectNetworks(object):
             network.ensure()
 
 
-def get_networks(service_dict, network_definitions):
+def get_network_names_for_service(service_dict):
     if 'network_mode' in service_dict:
         return []
+    return service_dict.get('networks', ['default'])
 
+
+def get_networks(service_dict, network_definitions):
     networks = []
-    for name in service_dict.pop('networks', ['default']):
+    for name in get_network_names_for_service(service_dict):
         network = network_definitions.get(name)
         if network:
             networks.append(network.full_name)
@@ -172,4 +175,5 @@ def get_networks(service_dict, network_definitions):
             raise ConfigurationError(
                 'Service "{}" uses an undefined network "{}"'
                 .format(service_dict['name'], name))
+
     return networks

compose/project.py

@@ -96,6 +96,7 @@ class Project(object):
 
             project.services.append(
                 Service(
+                    service_dict.pop('name'),
                     client=client,
                     project=name,
                     use_networking=use_networking,

compose/service.py

@@ -472,6 +472,7 @@ class Service(object):
             'image_id': self.image()['Id'],
             'links': self.get_link_names(),
             'net': self.network_mode.id,
+            'networks': self.networks,
             'volumes_from': [
                 (v.source.name, v.mode)
                 for v in self.volumes_from if isinstance(v.source, Service)