Add km module kafka

tests/kafkatest/utils/remote_account.py

@@ -0,0 +1,39 @@
+# 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.
+
+
+def file_exists(node, file):
+    """Quick and dirty check for existence of remote file."""
+    try:
+        node.account.ssh("cat " + file, allow_fail=False)
+        return True
+    except:
+        return False
+
+def path_exists(node, path):
+    """Quick and dirty check for existence of remote path."""
+    try:
+        node.account.ssh("ls " + path, allow_fail=False)
+        return True
+    except:
+        return False
+
+def line_count(node, file):
+    """Return the line count of file on node"""
+    out = [line for line in node.account.ssh_capture("wc -l %s" % file)]
+    if len(out) != 1:
+        raise Exception("Expected single line of output from wc -l")
+
+    return int(out[0].strip().split(" ")[0])