small bugfix in netns metadata

diff --git a/src/nepi/testbeds/netns/metadata_v01.py b/src/nepi/testbeds/netns/metadata_v01.py
index 4c6fc0f..2f0472b 100644 (file)
--- a/src/nepi/testbeds/netns/metadata_v01.py
+++ b/src/nepi/testbeds/netns/metadata_v01.py
@@ -143,8 +143,10 @@ def create_application(testbed_instance, guid):
 def start_application(testbed_instance, guid):
     parameters = testbed_instance._get_parameters(guid)
     traces = testbed_instance._get_traces(guid)
-    user = parameters["user"]
     command = parameters["command"]
+    user = None
+    if "user" in parameters:
+        user = parameters["user"]
     stdout = stderr = None
     if "stdout" in traces:
         filename = testbed_instance.trace_filename(guid, "stdout")