Add km module kafka

tests/spec/external_command.json

@@ -0,0 +1,33 @@
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//
+// An example task specification for running an external command in Trogdor.
+// Note that this task spec uses a relative path, so make sure you launch
+// Trogdor from the project root directory when using it.
+// See TROGDOR.md for details.
+//
+
+{
+  "class": "org.apache.kafka.trogdor.workload.ExternalCommandSpec",
+  "command": ["./tests/bin/external_trogdor_command_example.py"],
+  "durationMs": 10000000,
+  "commandNode": "node0",
+  "workload":{
+    "class": "org.apache.kafka.trogdor.workload.ProduceBenchSpec",
+    "message": "Hello, world",
+    "delayMs": 2000
+  }
+}