Propagate labels up to the scheduler

zoe_master/backends/docker/threads.py

@@ -73,6 +73,7 @@ class DockerStateSynchronizer(threading.Thread):
                 time.sleep(CHECK_INTERVAL)
                 continue
             node_stats.status = 'online'
+            node_stats.labels = host_config.labels
 
             service_list = self.state.service_list(backend_host=host_config.name)
             try:
@@ -111,6 +112,7 @@ class DockerStateSynchronizer(threading.Thread):
         node_stats.container_count = info['Containers']
         node_stats.cores_total = info['NCPU']
         node_stats.memory_total = info['MemTotal']
+        node_stats.labels += info['Labels']
 
         stats = {}
         for cont in container_list:

zoe_master/scheduler/simulated_platform.py

@@ -22,6 +22,7 @@ class SimulatedNode:
         self.real_active_containers = real_node.container_count
         self.services = []
         self.name = real_node.name
+        self.labels = real_node.labels
 
     def service_fits(self, service: Service) -> bool:
         """Checks whether a service can fit in this node"""

zoe_master/stats.py

@@ -39,7 +39,7 @@ class NodeStats(Stats):
         self.memory_total = 0
         self.memory_reserved = 0
         self.memory_in_use = 0
-        self.labels = {}
+        self.labels = []
         self.status = None
         self.error = ''
         self.services = []