resources/libraries/python/honeycomb/HoneycombSetup.py

   1 # Copyright (c) 2018 Cisco and/or its affiliates.
   2 # Licensed under the Apache License, Version 2.0 (the "License");
   3 # you may not use this file except in compliance with the License.
   4 # You may obtain a copy of the License at:
   5 #
   6 #     http://www.apache.org/licenses/LICENSE-2.0
   7 #
   8 # Unless required by applicable law or agreed to in writing, software
   9 # distributed under the License is distributed on an "AS IS" BASIS,
  10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  11 # See the License for the specific language governing permissions and
  12 # limitations under the License.
  13
  14 """Implementation of keywords for Honeycomb setup."""
  15
  16 from json import loads
  17 from time import time, sleep
  18
  19 from ipaddress import IPv6Address, AddressValueError
  20
  21 from robot.api import logger
  22
  23 from resources.libraries.python.HTTPRequest import HTTPRequest, HTTPCodes, \
  24     HTTPRequestError
  25 from resources.libraries.python.Constants import Constants as Const
  26 from resources.libraries.python.honeycomb.HoneycombUtil import HoneycombError
  27 from resources.libraries.python.honeycomb.HoneycombUtil \
  28     import HoneycombUtil as HcUtil
  29 from resources.libraries.python.ssh import SSH
  30 from resources.libraries.python.topology import NodeType
  31
  32
  33 class HoneycombSetup(object):
  34     """Implements keywords for Honeycomb setup.
  35
  36     The keywords implemented in this class make possible to:
  37     - start Honeycomb,
  38     - stop Honeycomb,
  39     - check the Honeycomb start-up state,
  40     - check the Honeycomb shutdown state,
  41     - add VPP to the topology.
  42     """
  43
  44     def __init__(self):
  45         pass
  46
  47     @staticmethod
  48     def start_honeycomb_on_duts(*nodes):
  49         """Start Honeycomb on specified DUT nodes.
  50
  51         This keyword starts the Honeycomb service on specified DUTs.
  52         The keyword just starts the Honeycomb and does not check its startup
  53         state. Use the keyword "Check Honeycomb Startup State" to check if the
  54         Honeycomb is up and running.
  55         Honeycomb must be installed in "/opt" directory, otherwise the start
  56         will fail.
  57
  58         :param nodes: List of nodes to start Honeycomb on.
  59         :type nodes: list
  60         :raises HoneycombError: If Honeycomb fails to start.
  61         """
  62
  63         HoneycombSetup.print_environment(nodes)
  64
  65         cmd = "sudo service honeycomb start"
  66
  67         for node in nodes:
  68             if node['type'] == NodeType.DUT:
  69                 logger.console(
  70                     "\n(re)Starting Honeycomb service on node {0}".format(
  71                         node["host"]))
  72                 ssh = SSH()
  73                 ssh.connect(node)
  74                 (ret_code, _, _) = ssh.exec_command_sudo(cmd)
  75                 if int(ret_code) != 0:
  76                     raise HoneycombError('Node {0} failed to start Honeycomb.'.
  77                                          format(node['host']))
  78                 else:
  79                     logger.info("Starting the Honeycomb service on node {0} is "
  80                                 "in progress ...".format(node['host']))
  81
  82     @staticmethod
  83     def stop_honeycomb_on_duts(*nodes):
  84         """Stop the Honeycomb service on specified DUT nodes.
  85
  86         This keyword stops the Honeycomb service on specified nodes. It just
  87         stops the Honeycomb and does not check its shutdown state. Use the
  88         keyword "Check Honeycomb Shutdown State" to check if Honeycomb has
  89         stopped.
  90
  91         :param nodes: List of nodes to stop Honeycomb on.
  92         :type nodes: list
  93         :raises HoneycombError: If Honeycomb failed to stop.
  94         """
  95
  96         cmd = "sudo service honeycomb stop"
  97         errors = []
  98
  99         for node in nodes:
 100             if node['type'] == NodeType.DUT:
 101                 logger.console(
 102                     "\nShutting down Honeycomb service on node {0}".format(
 103                         node["host"]))
 104                 ssh = SSH()
 105                 ssh.connect(node)
 106                 (ret_code, _, _) = ssh.exec_command_sudo(cmd)
 107                 if int(ret_code) != 0:
 108                     errors.append(node['host'])
 109                 else:
 110                     logger.info("Stopping the Honeycomb service on node {0} is "
 111                                 "in progress ...".format(node['host']))
 112         if errors:
 113             raise HoneycombError('Node(s) {0} failed to stop Honeycomb.'.
 114                                  format(errors))
 115
 116     @staticmethod
 117     def restart_honeycomb_on_dut(node):
 118         """Restart Honeycomb on specified DUT nodes.
 119
 120         This keyword restarts the Honeycomb service on specified DUTs. Use the
 121         keyword "Check Honeycomb Startup State" to check if the Honeycomb is up
 122         and running.
 123
 124         :param node: Node to restart Honeycomb on.
 125         :type node: dict
 126         :raises HoneycombError: If Honeycomb fails to start.
 127         """
 128
 129         logger.console(
 130             "\n(re)Starting Honeycomb service on node {0}".format(node["host"]))
 131
 132         cmd = "sudo service honeycomb restart"
 133
 134         ssh = SSH()
 135         ssh.connect(node)
 136         (ret_code, _, _) = ssh.exec_command_sudo(cmd)
 137         if int(ret_code) != 0:
 138             raise HoneycombError('Node {0} failed to restart Honeycomb.'.
 139                                  format(node['host']))
 140         else:
 141             logger.info(
 142                 "Honeycomb service restart is in progress on node {0}".format(
 143                     node['host']))
 144
 145     @staticmethod
 146     def check_honeycomb_startup_state(node, timeout=360, retries=20,
 147                                       interval=15):
 148         """Repeatedly check the status of Honeycomb startup until it is fully
 149         started or until timeout or max retries is reached.
 150
 151         :param node: Honeycomb node.
 152         :param timeout: Timeout value in seconds.
 153         :param retries: Max number of retries.
 154         :param interval: Interval between checks, in seconds.
 155         :type node: dict
 156         :type timeout: int
 157         :type retries: int
 158         :type interval: int
 159         :raises HoneycombError: If the Honeycomb process IP cannot be found,
 160             or if timeout or number of retries is exceeded.
 161         """
 162
 163         ssh = SSH()
 164         ssh.connect(node)
 165
 166         count = 0
 167         start = time()
 168         while time() - start < timeout and count < retries:
 169             count += 1
 170
 171             try:
 172                 status_code_version, _ = HcUtil.get_honeycomb_data(
 173                     node, "oper_vpp_version")
 174                 status_code_if_cfg, _ = HcUtil.get_honeycomb_data(
 175                     node, "config_vpp_interfaces")
 176                 status_code_if_oper, _ = HcUtil.get_honeycomb_data(
 177                     node, "oper_vpp_interfaces")
 178             except HTTPRequestError:
 179                 sleep(interval)
 180                 continue
 181             if status_code_if_cfg == HTTPCodes.OK\
 182                     and status_code_if_cfg == HTTPCodes.OK\
 183                     and status_code_if_oper == HTTPCodes.OK:
 184                 logger.info("Check successful, Honeycomb is up and running.")
 185                 break
 186             else:
 187                 logger.debug(
 188                     "Attempt ${count} failed on Restconf check. Status codes:\n"
 189                     "Version: {version}\n"
 190                     "Interface config: {if_cfg}\n"
 191                     "Interface operational: {if_oper}".format(
 192                         count=count,
 193                         version=status_code_version,
 194                         if_cfg=status_code_if_cfg,
 195                         if_oper=status_code_if_oper))
 196                 sleep(interval)
 197                 continue
 198         else:
 199             _, vpp_status, _ = ssh.exec_command("sudo service vpp status")
 200             raise HoneycombError(
 201                 "Timeout or max retries exceeded. Status of VPP:\n"
 202                 "{vpp_status}".format(vpp_status=vpp_status))
 203
 204     @staticmethod
 205     def check_honeycomb_shutdown_state(node):
 206         """Check state of Honeycomb service during shutdown on specified nodes.
 207
 208         Honeycomb nodes reply with connection refused or the following status
 209         codes depending on shutdown progress: codes 200, 404.
 210
 211         :param node: List of DUT nodes stopping Honeycomb.
 212         :type node: dict
 213         :returns: True if all GETs fail to connect.
 214         :rtype: bool
 215         """
 216         cmd = "pgrep honeycomb"
 217
 218         ssh = SSH()
 219         ssh.connect(node)
 220         (ret_code, _, _) = ssh.exec_command_sudo(cmd)
 221         if ret_code == 0:
 222             raise HoneycombError('Honeycomb on node {0} is still '
 223                                  'running.'.format(node['host']),
 224                                  enable_logging=False)
 225         else:
 226             logger.info("Honeycomb on node {0} has stopped".
 227                         format(node['host']))
 228         return True
 229
 230     @staticmethod
 231     def configure_restconf_binding_address(node):
 232         """Configure Honeycomb to accept restconf requests from all IP
 233         addresses. IP version is determined by node data.
 234
 235         :param node: Information about a DUT node.
 236         :type node: dict
 237         :raises HoneycombError: If the configuration could not be changed.
 238         """
 239
 240         find = "restconf-binding-address"
 241         try:
 242             IPv6Address(unicode(node["host"]))
 243             # if management IP of the node is in IPv6 format
 244             replace = '\\"restconf-binding-address\\": \\"0::0\\",'
 245         except (AttributeError, AddressValueError):
 246             replace = '\\"restconf-binding-address\\": \\"0.0.0.0\\",'
 247
 248         argument = '"/{0}/c\\ {1}"'.format(find, replace)
 249         path = "{0}/config/restconf.json".format(Const.REMOTE_HC_DIR)
 250         command = "sed -i {0} {1}".format(argument, path)
 251
 252         ssh = SSH()
 253         ssh.connect(node)
 254         (ret_code, _, stderr) = ssh.exec_command_sudo(command)
 255         if ret_code != 0:
 256             raise HoneycombError("Failed to modify configuration on "
 257                                  "node {0}, {1}".format(node, stderr))
 258
 259     @staticmethod
 260     def configure_jvpp_timeout(node, timeout=10):
 261         """Configure timeout value for Java API commands Honeycomb sends to VPP.
 262
 263         :param node: Information about a DUT node.
 264         :param timeout: Timeout value in seconds.
 265         :type node: dict
 266         :type timeout: int
 267         :raises HoneycombError: If the configuration could not be changed.
 268         """
 269
 270         find = "jvpp-request-timeout"
 271         replace = '\\"jvpp-request-timeout\\": {0}'.format(timeout)
 272
 273         argument = '"/{0}/c\\ {1}"'.format(find, replace)
 274         path = "{0}/config/jvpp.json".format(Const.REMOTE_HC_DIR)
 275         command = "sed -i {0} {1}".format(argument, path)
 276
 277         ssh = SSH()
 278         ssh.connect(node)
 279         (ret_code, _, stderr) = ssh.exec_command_sudo(command)
 280         if ret_code != 0:
 281             raise HoneycombError("Failed to modify configuration on "
 282                                  "node {0}, {1}".format(node, stderr))
 283
 284     @staticmethod
 285     def print_environment(nodes):
 286         """Print information about the nodes to log. The information is defined
 287         by commands in cmds tuple at the beginning of this method.
 288
 289         :param nodes: List of DUT nodes to get information about.
 290         :type nodes: list
 291         """
 292
 293         # TODO: When everything is set and running in VIRL env, transform this
 294         # method to a keyword checking the environment.
 295
 296         cmds = ("uname -a",
 297                 "df -lh",
 298                 "echo $JAVA_HOME",
 299                 "echo $PATH",
 300                 "which java",
 301                 "java -version",
 302                 "dpkg --list | grep openjdk",
 303                 "ls -la /opt/honeycomb",
 304                 "cat /opt/honeycomb/modules/*module-config")
 305
 306         for node in nodes:
 307             if node['type'] == NodeType.DUT:
 308                 logger.info("Checking node {} ...".format(node['host']))
 309                 for cmd in cmds:
 310                     logger.info("Command: {}".format(cmd))
 311                     ssh = SSH()
 312                     ssh.connect(node)
 313                     ssh.exec_command_sudo(cmd)
 314
 315     @staticmethod
 316     def print_ports(node):
 317         """Uses "sudo netstat -anp | grep java" to print port where a java
 318         application listens.
 319
 320         :param node: Honeycomb node where we want to print the ports.
 321         :type node: dict
 322         """
 323
 324         cmds = ("netstat -anp | grep java",
 325                 "ps -ef | grep [h]oneycomb")
 326
 327         logger.info("Checking node {} ...".format(node['host']))
 328         for cmd in cmds:
 329             logger.info("Command: {}".format(cmd))
 330             ssh = SSH()
 331             ssh.connect(node)
 332             ssh.exec_command_sudo(cmd)
 333
 334     @staticmethod
 335     def configure_log_level(node, level):
 336         """Set Honeycomb logging to the specified level.
 337
 338         :param node: Honeycomb node.
 339         :param level: Log level (INFO, DEBUG, TRACE).
 340         :type node: dict
 341         :type level: str
 342         """
 343
 344         find = 'logger name=\\"io.fd\\"'
 345         replace = '<logger name=\\"io.fd\\" level=\\"{0}\\"/>'.format(level)
 346
 347         argument = '"/{0}/c\\ {1}"'.format(find, replace)
 348         path = "{0}/config/logback.xml".format(Const.REMOTE_HC_DIR)
 349         command = "sed -i {0} {1}".format(argument, path)
 350
 351         ssh = SSH()
 352         ssh.connect(node)
 353         (ret_code, _, stderr) = ssh.exec_command_sudo(command)
 354         if ret_code != 0:
 355             raise HoneycombError("Failed to modify configuration on "
 356                                  "node {0}, {1}".format(node, stderr))
 357
 358     @staticmethod
 359     def manage_honeycomb_features(node, feature, disable=False):
 360         """Configure Honeycomb to use features that are disabled by default, or
 361         disable previously enabled features.
 362
 363         ..Note:: If the module is not enabled in VPP, Honeycomb will
 364         be unable to establish VPP connection.
 365
 366         :param node: Honeycomb node.
 367         :param feature: Feature to enable.
 368         :param disable: Disable the specified feature instead of enabling it.
 369         :type node: dict
 370         :type feature: string
 371         :type disable: bool
 372         :raises HoneycombError: If the configuration could not be changed.
 373         """
 374
 375         disabled_features = {
 376             "NSH": ["io.fd.hc2vpp.vppnsh.impl.VppNshModule"],
 377             "BGP": ["io.fd.hc2vpp.bgp.inet.BgpInetModule",
 378                     "io.fd.honeycomb.infra.bgp.BgpModule",
 379                     "io.fd.honeycomb.infra.bgp.BgpReadersModule",
 380                     "io.fd.honeycomb.infra.bgp.BgpWritersModule",
 381                     "io.fd.honeycomb.northbound.bgp.extension.InetModule",
 382                     "io.fd.honeycomb.northbound.bgp.extension.EvpnModule",
 383                     "io.fd.honeycomb.northbound.bgp.extension.L3VpnV4Module",
 384                     "io.fd.honeycomb.northbound.bgp.extension.L3VpnV6Module",
 385                     "io.fd.honeycomb.northbound.bgp.extension."
 386                     "LabeledUnicastModule",
 387                     "io.fd.honeycomb.northbound.bgp.extension.LinkstateModule"]
 388         }
 389
 390         ssh = SSH()
 391         ssh.connect(node)
 392
 393         if feature in disabled_features.keys():
 394             # for every module, uncomment by replacing the entire line
 395             for item in disabled_features[feature]:
 396                 find = replace = "{0}".format(item)
 397                 if disable:
 398                     replace = "// {0}".format(find)
 399
 400                 argument = '"/{0}/c\\ {1}"'.format(find, replace)
 401                 path = "{0}/modules/*module-config"\
 402                     .format(Const.REMOTE_HC_DIR)
 403                 command = "sed -i {0} {1}".format(argument, path)
 404
 405                 (ret_code, _, stderr) = ssh.exec_command_sudo(command)
 406                 if ret_code != 0:
 407                     raise HoneycombError("Failed to modify configuration on "
 408                                          "node {0}, {1}".format(node, stderr))
 409         else:
 410             raise HoneycombError(
 411                 "Unrecognized feature {0}.".format(feature))
 412
 413     @staticmethod
 414     def copy_java_libraries(node):
 415         """Copy Java libraries installed by vpp-api-java package to honeycomb
 416         lib folder.
 417
 418         This is a (temporary?) workaround for jvpp version mismatches.
 419
 420         :param node: Honeycomb node
 421         :type node: dict
 422         """
 423
 424         ssh = SSH()
 425         ssh.connect(node)
 426         (_, stdout, _) = ssh.exec_command_sudo(
 427             "ls /usr/share/java | grep ^jvpp-*")
 428
 429         files = stdout.split("\n")[:-1]
 430         for item in files:
 431             # example filenames:
 432             # jvpp-registry-17.04.jar
 433             # jvpp-core-17.04.jar
 434
 435             parts = item.split("-")
 436             version = "{0}-SNAPSHOT".format(parts[2][:5])
 437             artifact_id = "{0}-{1}".format(parts[0], parts[1])
 438
 439             directory = "{0}/lib/io/fd/vpp/{1}/{2}".format(
 440                 Const.REMOTE_HC_DIR, artifact_id, version)
 441             cmd = "sudo mkdir -p {0}; " \
 442                   "sudo cp /usr/share/java/{1} {0}/{2}-{3}.jar".format(
 443                       directory, item, artifact_id, version)
 444
 445             (ret_code, _, stderr) = ssh.exec_command(cmd)
 446             if ret_code != 0:
 447                 raise HoneycombError("Failed to copy JVPP libraries on "
 448                                      "node {0}, {1}".format(node, stderr))
 449
 450     @staticmethod
 451     def copy_odl_client(node, odl_name, src_path, dst_path):
 452         """Copy ODL Client from source path to destination path.
 453
 454         :param node: Honeycomb node.
 455         :param odl_name: Name of ODL client version to use.
 456         :param src_path: Source Path where to find ODl client.
 457         :param dst_path: Destination path.
 458         :type node: dict
 459         :type odl_name: str
 460         :type src_path: str
 461         :type dst_path: str
 462         :raises HoneycombError: If the operation fails.
 463         """
 464
 465         ssh = SSH()
 466         ssh.connect(node)
 467
 468         cmd = "sudo rm -rf {dst}/*karaf_{odl_name} && " \
 469               "cp -r {src}/*karaf_{odl_name}* {dst}".format(
 470                   src=src_path, odl_name=odl_name, dst=dst_path)
 471
 472         ret_code, _, _ = ssh.exec_command_sudo(cmd, timeout=180)
 473         if int(ret_code) != 0:
 474             raise HoneycombError(
 475                 "Failed to copy ODL client on node {0}".format(node["host"]))
 476
 477     @staticmethod
 478     def setup_odl_client(node, path):
 479         """Start ODL client on the specified node.
 480
 481         Karaf should be located in the provided path, and VPP and Honeycomb
 482         should already be running, otherwise the start will fail.
 483
 484         :param node: Node to start ODL client on.
 485         :param path: Path to ODL client on node.
 486         :type node: dict
 487         :type path: str
 488         :raises HoneycombError: If Honeycomb fails to start.
 489         """
 490
 491         logger.console("\nStarting ODL client ...")
 492         ssh = SSH()
 493         ssh.connect(node)
 494
 495         cmd = "{path}/*karaf*/bin/start clean".format(path=path)
 496         ret_code, _, _ = ssh.exec_command_sudo(cmd)
 497
 498         if int(ret_code) != 0:
 499             raise HoneycombError('Node {0} failed to start ODL.'.
 500                                  format(node['host']))
 501         else:
 502             logger.info("Starting the ODL client on node {0} is "
 503                         "in progress ...".format(node['host']))
 504
 505     @staticmethod
 506     def install_odl_features(node, odl_name, path, *features):
 507         """Install required features on a running ODL client.
 508
 509         :param node: Honeycomb node.
 510         :param odl_name: Name of ODL client version to use.
 511         :param path: Path to ODL client on node.
 512         :param features: Optional, list of additional features to install.
 513         :type node: dict
 514         :type odl_name: str
 515         :type path: str
 516         :type features: list
 517         """
 518
 519         ssh = SSH()
 520         ssh.connect(node)
 521
 522         auth = "-u karaf"
 523         if odl_name.lower() == "oxygen" or odl_name.lower() == "fluorine":
 524             auth = "-u karaf -p karaf"
 525
 526         cmd = "{path}/*karaf*/bin/client {auth} feature:install " \
 527               "odl-restconf-all " \
 528               "odl-netconf-connector-all " \
 529               "odl-netconf-topology".format(path=path, auth=auth)
 530         for feature in features:
 531             cmd += " {0}".format(feature)
 532
 533         ret_code, _, _ = ssh.exec_command_sudo(cmd, timeout=250)
 534
 535         if int(ret_code) != 0:
 536             raise HoneycombError("Feature install did not succeed.")
 537
 538     @staticmethod
 539     def check_odl_startup_state(node):
 540         """Check the status of ODL client startup.
 541
 542         :param node: Honeycomb node.
 543         :param node: dict
 544         :returns: True when ODL is started.
 545         :rtype: bool
 546         :raises HoneycombError: When the response is not code 200: OK.
 547         """
 548
 549         path = HcUtil.read_path_from_url_file(
 550             "odl_client/odl_netconf_connector")
 551         expected_status_codes = (HTTPCodes.UNAUTHORIZED,
 552                                  HTTPCodes.FORBIDDEN,
 553                                  HTTPCodes.NOT_FOUND,
 554                                  HTTPCodes.SERVICE_UNAVAILABLE,
 555                                  HTTPCodes.INTERNAL_SERVER_ERROR)
 556
 557         status_code, _ = HTTPRequest.get(node, path, timeout=10,
 558                                          enable_logging=False)
 559         if status_code == HTTPCodes.OK:
 560             logger.info("ODL client on node {0} is up and running".
 561                         format(node['host']))
 562         elif status_code in expected_status_codes:
 563             if status_code == HTTPCodes.UNAUTHORIZED:
 564                 logger.info('Unauthorized. If this triggers keyword '
 565                             'timeout, verify username and password.')
 566             raise HoneycombError('ODL client on node {0} running but '
 567                                  'not yet ready.'.format(node['host']),
 568                                  enable_logging=False)
 569         else:
 570             raise HoneycombError('Unexpected return code: {0}.'.
 571                                  format(status_code))
 572         return True
 573
 574     @staticmethod
 575     def check_odl_shutdown_state(node):
 576         """Check the status of ODL client shutdown.
 577
 578         :param node: Honeycomb node.
 579         :type node: dict
 580         :returns: True when ODL is stopped.
 581         :rtype: bool
 582         :raises HoneycombError: When the response is not code 200: OK.
 583         """
 584
 585         cmd = "pgrep -f karaf"
 586         path = HcUtil.read_path_from_url_file(
 587             "odl_client/odl_netconf_connector")
 588
 589         try:
 590             HTTPRequest.get(node, path, timeout=10, enable_logging=False)
 591             raise HoneycombError("ODL client is still running.")
 592         except HTTPRequestError:
 593             logger.debug("Connection refused, checking process state....")
 594             ssh = SSH()
 595             ssh.connect(node)
 596             ret_code, _, _ = ssh.exec_command(cmd)
 597             if ret_code == 0:
 598                 raise HoneycombError("ODL client is still running.")
 599
 600         return True
 601
 602     @staticmethod
 603     def mount_honeycomb_on_odl(node):
 604         """Tell ODL client to mount Honeycomb instance over netconf.
 605
 606         :param node: Honeycomb node.
 607         :type node: dict
 608         :raises HoneycombError: When the response is not code 200: OK.
 609         """
 610
 611         path = HcUtil.read_path_from_url_file(
 612             "odl_client/odl_netconf_connector")
 613
 614         url_file = "{0}/{1}".format(Const.RESOURCES_TPL_HC,
 615                                     "odl_client/mount_honeycomb.json")
 616
 617         with open(url_file) as template:
 618             data = template.read()
 619
 620         data = loads(data)
 621
 622         status_code, _ = HTTPRequest.post(
 623             node,
 624             path,
 625             headers={"Content-Type": "application/json",
 626                      "Accept": "text/plain"},
 627             json=data,
 628             timeout=10,
 629             enable_logging=False)
 630
 631         if status_code == HTTPCodes.OK:
 632             logger.info("ODL mount point configured successfully.")
 633         elif status_code == HTTPCodes.CONFLICT:
 634             logger.info("ODL mount point was already configured.")
 635         else:
 636             raise HoneycombError('Mount point configuration not successful')
 637
 638     @staticmethod
 639     def stop_odl_client(node, path):
 640         """Stop ODL client service on the specified node.
 641
 642         :param node: Node to start ODL client on.
 643         :param path: Path to ODL client.
 644         :type node: dict
 645         :type path: str
 646         :raises HoneycombError: If ODL client fails to stop.
 647         """
 648
 649         ssh = SSH()
 650         ssh.connect(node)
 651
 652         cmd = "{0}/*karaf*/bin/stop".format(path)
 653
 654         ssh = SSH()
 655         ssh.connect(node)
 656         ret_code, _, _ = ssh.exec_command_sudo(cmd)
 657         if int(ret_code) != 0:
 658             logger.debug("ODL Client refused to shut down.")
 659             cmd = "pkill -f 'karaf'"
 660             (ret_code, _, _) = ssh.exec_command_sudo(cmd)
 661             if int(ret_code) != 0:
 662                 raise HoneycombError('Node {0} failed to stop ODL.'.
 663                                      format(node['host']))
 664
 665         logger.info("ODL client service stopped.")
 666
 667     @staticmethod
 668     def set_static_arp(node, ip_address, mac_address):
 669         """Configure a static ARP entry using arp.
 670
 671         :param node: Node in topology.
 672         :param ip_address: IP address for the entry.
 673         :param mac_address: MAC adddress for the entry.
 674         :type node: dict
 675         :type ip_address: str
 676         :type mac_address: str
 677         :raises RuntimeError: If the operation fails.
 678         """
 679
 680         ssh = SSH()
 681         ssh.connect(node)
 682         ret_code, _, _ = ssh.exec_command_sudo("arp -s {0} {1}".format(
 683             ip_address, mac_address))
 684
 685         if ret_code != 0:
 686             raise RuntimeError("Failed to configure static ARP adddress.")
 687
 688
 689 class HoneycombStartupConfig(object):
 690     """Generator for Honeycomb startup configuration.
 691     """
 692     def __init__(self):
 693         """Initializer."""
 694
 695         self.template = """#!/bin/sh -
 696         STATUS=100
 697
 698         while [ $STATUS -eq 100 ]
 699         do
 700           {java_call} -jar $(dirname $0)/{jar_filename}
 701           STATUS=$?
 702           echo "Honeycomb exited with status: $STATUS"
 703           if [ $STATUS -eq 100 ]
 704           then
 705             echo "Restarting..."
 706           fi
 707         done
 708         """
 709
 710         self.java_call = "{scheduler} {affinity} java{jit_mode}{params}"
 711
 712         self.scheduler = ""
 713         self.core_affinity = ""
 714         self.jit_mode = ""
 715         self.params = ""
 716         self.numa = ""
 717
 718         self.config = ""
 719         self.ssh = SSH()
 720
 721     def apply_config(self, node):
 722         """Generate configuration file /opt/honeycomb/honeycomb on the specified
 723         node.
 724
 725         :param node: Honeycomb node.
 726         :type node: dict
 727         """
 728
 729         self.ssh.connect(node)
 730         _, filename, _ = self.ssh.exec_command("ls /opt/honeycomb | grep .jar")
 731
 732         java_call = self.java_call.format(scheduler=self.scheduler,
 733                                           affinity=self.core_affinity,
 734                                           jit_mode=self.jit_mode,
 735                                           params=self.params)
 736         self.config = self.template.format(java_call=java_call,
 737                                            jar_filename=filename)
 738
 739         self.ssh.connect(node)
 740         cmd = "echo '{config}' > /tmp/honeycomb " \
 741               "&& chmod +x /tmp/honeycomb " \
 742               "&& sudo mv -f /tmp/honeycomb /opt/honeycomb".\
 743             format(config=self.config)
 744         self.ssh.exec_command(cmd)
 745
 746     def set_cpu_scheduler(self, scheduler="FIFO"):
 747         """Use alternate CPU scheduler.
 748
 749         Note: OTHER scheduler doesn't load-balance over isolcpus.
 750
 751         :param scheduler: CPU scheduler to use.
 752         :type scheduler: str
 753         """
 754
 755         schedulers = {"FIFO": "-f 99",  # First In, First Out
 756                       "RR": "-r 99",  # Round Robin
 757                       "OTHER": "-o",  # Ubuntu default
 758                      }
 759         self.scheduler = "chrt {0}".format(schedulers[scheduler])
 760
 761     def set_cpu_core_affinity(self, low, high=None):
 762         """Set core affinity for the honeycomb process and subprocesses.
 763
 764         :param low: Lowest core ID number.
 765         :param high: Highest core ID number. Leave empty to use a single core.
 766         :type low: int
 767         :type high: int
 768         """
 769
 770         self.core_affinity = "taskset -c {low}-{high}".format(
 771             low=low, high=high if high else low)
 772
 773     def set_jit_compiler_mode(self, jit_mode):
 774         """Set running mode for Java's JIT compiler.
 775
 776         :param jit_mode: Desiret JIT mode.
 777         :type jit_mode: str
 778         """
 779
 780         modes = {"client": " -client",  # Default
 781                  "server": " -server",  # Higher performance but longer warmup
 782                  "classic": " -classic"  # Disables JIT compiler
 783                 }
 784
 785         self.jit_mode = modes[jit_mode]
 786
 787     def set_memory_size(self, mem_min, mem_max=None):
 788         """Set minimum and maximum memory use for the JVM.
 789
 790         :param mem_min: Minimum amount of memory (MB).
 791         :param mem_max: Maximum amount of memory (MB). Default is 4 times
 792             minimum value.
 793         :type mem_min: int
 794         :type mem_max: int
 795         """
 796
 797         self.params += " -Xms{min}m -Xmx{max}m".format(
 798             min=mem_min, max=mem_max if mem_max else mem_min*4)
 799
 800     def set_metaspace_size(self, mem_min, mem_max=None):
 801         """Set minimum and maximum memory used for class metadata in the JVM.
 802
 803         :param mem_min: Minimum metaspace size (MB).
 804         :param mem_max: Maximum metaspace size (MB). Defailt is 4 times
 805             minimum value.
 806         :type mem_min: int
 807         :type mem_max: int
 808         """
 809
 810         self.params += " -XX:MetaspaceSize={min}m " \
 811                        "-XX:MaxMetaspaceSize={max}m".format(
 812                            min=mem_min, max=mem_max if mem_max else mem_min*4)
 813
 814     def set_numa_optimization(self):
 815         """Use optimization of memory use and garbage collection for NUMA
 816         architectures."""
 817
 818         self.params += " -XX:+UseNUMA -XX:+UseParallelGC"
 819
 820     def set_ssh_security_provider(self):
 821         """Disables BouncyCastle for SSHD."""
 822         # Workaround for issue described in:
 823         # https://wiki.fd.io/view/Honeycomb/Releases/1609/Honeycomb_and_ODL
 824
 825         self.params += " -Dorg.apache.sshd.registerBouncyCastle=false"