Add --exit-timeout parameter (hidden for now, experimental feature)

locust_swarm/swarm.py

@@ -104,6 +104,12 @@
     type=str,
     help="An ssh server to use as locust master (default is to run the master on the same machine as swarm). This is useful when rurnning swarm on your workstation if it might become disconnected",
 )
+parser.add_argument(
+    "--exit-timeout",
+    type=int,
+    default=31,
+    help=configargparse.SUPPRESS,
+)
 parser.add_argument(
     "-t",
     "--run-time",
@@ -505,7 +511,7 @@ def get_available_servers_and_lock_them():
             code = master_proc.wait(timeout=10)
             break
         except subprocess.TimeoutExpired:
-            if max_run_time + 31 < time.time() - start_time:
+            if max_run_time + args.exit_timeout < time.time() - start_time:
                 logging.error(
                     f"Locust exceeded the run time specified ({max_run_time}) by more than 30 seconds, giving up"
                 )  #  pylint: disable=raise-missing-from