push activity to hub via api

servers publish activity on a regular interval (default: 5m)

jupyterhub/services/service.py

@@ -107,6 +107,8 @@ class _ServiceSpawner(LocalProcessSpawner):
     def start(self):
         """Start the process"""
         env = self.get_env()
+        # no activity url for services
+        env.pop('JUPYTERHUB_ACTIVITY_URL', None)
         if os.name == 'nt':
             env['SYSTEMROOT'] = os.environ['SYSTEMROOT']
         cmd = self.cmd