Add OVS logger

Add utility class to log OVS flows from a remote server.

Change-Id: I80cb5b20dc15477771beb912f44cab28c7397e24
Signed-off-by: George Paraskevopoulos <geopar@intracom-telecom.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/testcases/features/sfc/ovs_utils.py b/testcases/features/sfc/ovs_utils.py
new file mode 100644
index 000000000..83a36286d
--- /dev/null
+++ b/testcases/features/sfc/ovs_utils.py
@@ -0,0 +1,80 @@
+##############################################################################
+# Copyright (c) 2015 Ericsson AB and others.
+# Author: George Paraskevopoulos (geopar@intracom-telecom.com)
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+import functest.utils.functest_logger as rl
+import os
+import time
+
+logger = rl.Logger('ovs_utils').getLogger()
+
+
+class OVSLogger(object):
+    def __init__(self, basedir):
+        self.ovs_dir = os.path.join(basedir, 'odl-sfc/ovs')
+        self.__mkdir_p(self.ovs_dir)
+
+    def __mkdir_p(self, dirpath):
+        if not os.path.exists(dirpath):
+            os.makedirs(dirpath)
+
+    def __ssh_host(self, ssh_conn):
+        return ssh_conn.get_transport().getpeername()[0]
+
+    def __dump_to_file(self, operation, host, text, timestamp=None):
+        ts = (timestamp if timestamp is not None
+              else time.strftime("%Y%m%d-%H%M%S"))
+        dumpdir = os.path.join(self.ovs_dir, ts)
+        self.__mkdir_p(dumpdir)
+        fname = '{0}_{1}'.format(operation, host)
+        with open(os.path.join(dumpdir, fname), 'w') as f:
+            f.write(text)
+
+    def __remote_cmd(self, ssh_conn, cmd):
+        try:
+            _, stdout, stderr = ssh_conn.exec_command(cmd)
+            errors = stderr.readlines()
+            if len(errors) > 0:
+                host = self.__ssh_host(ssh_conn)
+                logger.error(''.join(errors))
+                raise Exception('Could not execute {0} in {1}'
+                                .format(cmd, host))
+            output = ''.join(stdout.readlines())
+            return output
+        except Exception, e:
+            logger.error('[__remote_command(ssh_client, {0})]: {1}'
+                         .format(cmd, e))
+            return None
+
+    def ofctl_dump_flows(self, ssh_conn, br='br-int',
+                         choose_table=None, timestamp=None):
+        try:
+            cmd = 'ovs-ofctl -OOpenFlow13 dump-flows {0}'.format(br)
+            if choose_table is not None:
+                cmd = '{0} table={1}'.format(cmd, choose_table)
+            output = self.__remote_cmd(ssh_conn, cmd)
+            operation = 'ofctl_dump_flows'
+            host = self.__ssh_host(ssh_conn)
+            self.__dump_to_file(operation, host, output, timestamp=timestamp)
+            return output
+        except Exception, e:
+            logger.error('[ofctl_dump_flows(ssh_client, {0}, {1})]: {2}'
+                         .format(br, choose_table, e))
+            return None
+
+    def vsctl_show(self, ssh_conn, timestamp=None):
+        try:
+            cmd = 'ovs-vsctl show'
+            output = self.__remote_cmd(ssh_conn, cmd)
+            operation = 'vsctl_show'
+            host = self.__ssh_host(ssh_conn)
+            self.__dump_to_file(operation, host, output, timestamp=timestamp)
+            return output
+        except Exception, e:
+            logger.error('[vsctl_show(ssh_client)]: {0}'.format(e))
+            return None