feat(controller): disable swap usage if there is a memory limit

Author: aledbf

controller/scheduler/fleet.py

@@ -129,7 +129,7 @@ def _create_container(self, name, image, command, unit, **kwargs):
         # prepare memory limit for the container type
         mem = kwargs.get('memory', {}).get(l['c_type'], None)
         if mem:
-            l.update({'memory': '-m {}'.format(mem.lower())})
+            l.update({'memory': '-m {} --memory-swap=-1'.format(mem.lower())})
         else:
             l.update({'memory': ''})
         # prepare memory limit for the container type