modules/opnfv/utils/ovs_logger.py

   1 ##############################################################################
   2 # Copyright (c) 2015 Ericsson AB and others.
   3 # Author: George Paraskevopoulos (geopar@intracom-telecom.com)
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9
  10 import opnfv.utils.OPNFVLogger as OPNFVLogger
  11 import os
  12 import time
  13 import shutil
  14
  15 logger = OPNFVLogger.Logger('ovs_logger').getLogger()
  16
  17
  18 class OVSLogger(object):
  19     def __init__(self, basedir, ft_resdir):
  20         self.ovs_dir = basedir
  21         self.ft_resdir = ft_resdir
  22         self.__mkdir_p(self.ovs_dir)
  23         self.__mkdir_p(self.ft_resdir)
  24
  25     def __mkdir_p(self, dirpath):
  26         if not os.path.exists(dirpath):
  27             os.makedirs(dirpath)
  28
  29     def __ssh_host(self, ssh_conn, host_prefix='10.20.0'):
  30         try:
  31             _, stdout, _ = ssh_conn.exec_command('hostname -I')
  32             hosts = stdout.readline().strip().split(' ')
  33             found_host = [h for h in hosts if h.startswith(host_prefix)][0]
  34             return found_host
  35         except Exception, e:
  36             logger.error(e)
  37
  38     def __dump_to_file(self, operation, host, text, timestamp=None):
  39         ts = (timestamp if timestamp is not None
  40               else time.strftime("%Y%m%d-%H%M%S"))
  41         dumpdir = os.path.join(self.ovs_dir, ts)
  42         self.__mkdir_p(dumpdir)
  43         fname = '{0}_{1}'.format(operation, host)
  44         with open(os.path.join(dumpdir, fname), 'w') as f:
  45             f.write(text)
  46
  47     def __remote_cmd(self, ssh_conn, cmd):
  48         try:
  49             _, stdout, stderr = ssh_conn.exec_command(cmd)
  50             errors = stderr.readlines()
  51             if len(errors) > 0:
  52                 host = self.__ssh_host(ssh_conn)
  53                 logger.error(''.join(errors))
  54                 raise Exception('Could not execute {0} in {1}'
  55                                 .format(cmd, host))
  56             output = ''.join(stdout.readlines())
  57             return output
  58         except Exception, e:
  59             logger.error('[__remote_command(ssh_client, {0})]: {1}'
  60                          .format(cmd, e))
  61             return None
  62
  63     def create_artifact_archive(self):
  64         shutil.make_archive(self.ovs_dir,
  65                             'zip',
  66                             root_dir=os.path.dirname(self.ovs_dir),
  67                             base_dir=self.ovs_dir)
  68         shutil.copy2('{0}.zip'.format(self.ovs_dir), self.ft_resdir)
  69
  70     def ofctl_dump_flows(self, ssh_conn, br='br-int',
  71                          choose_table=None, timestamp=None):
  72         try:
  73             cmd = 'ovs-ofctl -OOpenFlow13 dump-flows {0}'.format(br)
  74             if choose_table is not None:
  75                 cmd = '{0} table={1}'.format(cmd, choose_table)
  76             output = self.__remote_cmd(ssh_conn, cmd)
  77             operation = 'ofctl_dump_flows'
  78             host = self.__ssh_host(ssh_conn)
  79             self.__dump_to_file(operation, host, output, timestamp=timestamp)
  80             return output
  81         except Exception, e:
  82             logger.error('[ofctl_dump_flows(ssh_client, {0}, {1})]: {2}'
  83                          .format(br, choose_table, e))
  84             return None
  85
  86     def vsctl_show(self, ssh_conn, timestamp=None):
  87         try:
  88             cmd = 'ovs-vsctl show'
  89             output = self.__remote_cmd(ssh_conn, cmd)
  90             operation = 'vsctl_show'
  91             host = self.__ssh_host(ssh_conn)
  92             self.__dump_to_file(operation, host, output, timestamp=timestamp)
  93             return output
  94         except Exception, e:
  95             logger.error('[vsctl_show(ssh_client)]: {0}'.format(e))
  96             return None
  97
  98     def dump_ovs_logs(self, controller_clients, compute_clients,
  99                       related_error=None, timestamp=None):
 100         if timestamp is None:
 101             timestamp = time.strftime("%Y%m%d-%H%M%S")
 102
 103         for controller_client in controller_clients:
 104             self.ofctl_dump_flows(controller_client,
 105                                   timestamp=timestamp)
 106             self.vsctl_show(controller_client,
 107                             timestamp=timestamp)
 108
 109         for compute_client in compute_clients:
 110             self.ofctl_dump_flows(compute_client,
 111                                   timestamp=timestamp)
 112             self.vsctl_show(compute_client,
 113                             timestamp=timestamp)
 114
 115         if related_error is not None:
 116             dumpdir = os.path.join(self.ovs_dir, timestamp)
 117             with open(os.path.join(dumpdir, 'error'), 'w') as f:
 118                 f.write(related_error)