resources/libraries/python/honeycomb/HoneycombSetup.py

   1 # Copyright (c) 2017 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         :param nodes: List of nodes to start Honeycomb on.
  58         :type nodes: list
  59         :raises HoneycombError: If Honeycomb fails to start.
  60         """
  61
  62         HoneycombSetup.print_environment(nodes)
  63
  64         cmd = "sudo service honeycomb start"
  65
  66         for node in nodes:
  67             if node['type'] == NodeType.DUT:
  68                 logger.console(
  69                     "\n(re)Starting Honeycomb service on node {0}".format(
  70                         node["host"]))
  71                 ssh = SSH()
  72                 ssh.connect(node)
  73                 (ret_code, _, _) = ssh.exec_command_sudo(cmd)
  74                 if int(ret_code) != 0:
  75                     raise HoneycombError('Node {0} failed to start Honeycomb.'.
  76                                          format(node['host']))
  77                 else:
  78                     logger.info("Starting the Honeycomb service on node {0} is "
  79                                 "in progress ...".format(node['host']))
  80
  81     @staticmethod
  82     def stop_honeycomb_on_duts(*nodes):
  83         """Stop the Honeycomb service on specified DUT nodes.
  84
  85         This keyword stops the Honeycomb service on specified nodes. It just
  86         stops the Honeycomb and does not check its shutdown state. Use the
  87         keyword "Check Honeycomb Shutdown State" to check if Honeycomb has
  88         stopped.
  89         :param nodes: List of nodes to stop Honeycomb on.
  90         :type nodes: list
  91         :raises HoneycombError: If Honeycomb failed to stop.
  92         """
  93
  94         cmd = "sudo service honeycomb stop"
  95         errors = []
  96
  97         for node in nodes:
  98             if node['type'] == NodeType.DUT:
  99                 logger.console(
 100                     "\nShutting down Honeycomb service on node {0}".format(
 101                         node["host"]))
 102                 ssh = SSH()
 103                 ssh.connect(node)
 104                 (ret_code, _, _) = ssh.exec_command_sudo(cmd)
 105                 if int(ret_code) != 0:
 106                     errors.append(node['host'])
 107                 else:
 108                     logger.info("Stopping the Honeycomb service on node {0} is "
 109                                 "in progress ...".format(node['host']))
 110         if errors:
 111             raise HoneycombError('Node(s) {0} failed to stop Honeycomb.'.
 112                                  format(errors))
 113
 114     @staticmethod
 115     def restart_honeycomb_on_dut(node):
 116         """Restart Honeycomb on specified DUT nodes.
 117
 118         This keyword restarts the Honeycomb service on specified DUTs. Use the
 119         keyword "Check Honeycomb Startup State" to check if the Honeycomb is up
 120         and running.
 121
 122         :param node: Node to restart Honeycomb on.
 123         :type node: dict
 124         :raises HoneycombError: If Honeycomb fails to start.
 125         """
 126
 127         logger.console(
 128             "\n(re)Starting Honeycomb service on node {0}".format(node["host"]))
 129
 130         cmd = "sudo service honeycomb restart"
 131
 132         ssh = SSH()
 133         ssh.connect(node)
 134         (ret_code, _, _) = ssh.exec_command_sudo(cmd)
 135         if int(ret_code) != 0:
 136             raise HoneycombError('Node {0} failed to restart Honeycomb.'.
 137                                  format(node['host']))
 138         else:
 139             logger.info(
 140                 "Honeycomb service restart is in progress on node {0}".format(
 141                     node['host']))
 142
 143     @staticmethod
 144     def check_honeycomb_startup_state(node, timeout=360, retries=20,
 145                                       interval=15):
 146         """Repeatedly check the status of Honeycomb startup until it is fully
 147         started or until timeout or max retries is reached.
 148
 149         :param node: Honeycomb node.
 150         :param timeout: Timeout value in seconds.
 151         :param retries: Max number of retries.
 152         :param interval: Interval between checks, in seconds.
 153         :type node: dict
 154         :type timeout: int
 155         :type retries: int
 156         :type interval: int
 157         :raises HoneycombError: If the Honeycomb process IP cannot be found,
 158         or if timeout or number of retries is exceeded."""
 159
 160         ssh = SSH()
 161         ssh.connect(node)
 162
 163         count = 0
 164         start = time()
 165         while time() - start < timeout and count < retries:
 166             count += 1
 167
 168             try:
 169                 status_code_version, _ = HcUtil.get_honeycomb_data(
 170                     node, "oper_vpp_version")
 171                 status_code_if_cfg, _ = HcUtil.get_honeycomb_data(
 172                     node, "config_vpp_interfaces")
 173                 status_code_if_oper, _ = HcUtil.get_honeycomb_data(
 174                     node, "oper_vpp_interfaces")
 175             except HTTPRequestError:
 176                 sleep(interval)
 177                 continue
 178             if status_code_if_cfg == HTTPCodes.OK\
 179                     and status_code_if_cfg == HTTPCodes.OK\
 180                     and status_code_if_oper == HTTPCodes.OK:
 181                 logger.info("Check successful, Honeycomb is up and running.")
 182                 break
 183             else:
 184                 logger.debug(
 185                     "Attempt ${count} failed on Restconf check. Status codes:\n"
 186                     "Version: {version}\n"
 187                     "Interface config: {if_cfg}\n"
 188                     "Interface operational: {if_oper}".format(
 189                         count=count,
 190                         version=status_code_version,
 191                         if_cfg=status_code_if_cfg,
 192                         if_oper=status_code_if_oper))
 193                 sleep(interval)
 194                 continue
 195         else:
 196             _, vpp_status, _ = ssh.exec_command("sudo service vpp status")
 197             raise HoneycombError(
 198                 "Timeout or max retries exceeded. Status of VPP:\n"
 199                 "{vpp_status}".format(vpp_status=vpp_status))
 200
 201     @staticmethod
 202     def check_honeycomb_shutdown_state(node):
 203         """Check state of Honeycomb service during shutdown on specified nodes.
 204
 205         Honeycomb nodes reply with connection refused or the following status
 206         codes depending on shutdown progress: codes 200, 404.
 207
 208         :param node: List of DUT nodes stopping Honeycomb.
 209         :type node: dict
 210         :return: True if all GETs fail to connect.
 211         :rtype bool
 212         """
 213         cmd = "pgrep honeycomb"
 214
 215         ssh = SSH()
 216         ssh.connect(node)
 217         (ret_code, _, _) = ssh.exec_command_sudo(cmd)
 218         if ret_code == 0:
 219             raise HoneycombError('Honeycomb on node {0} is still '
 220                                  'running.'.format(node['host']),
 221                                  enable_logging=False)
 222         else:
 223             logger.info("Honeycomb on node {0} has stopped".
 224                         format(node['host']))
 225         return True
 226
 227     @staticmethod
 228     def configure_restconf_binding_address(node):
 229         """Configure Honeycomb to accept restconf requests from all IP
 230         addresses. IP version is determined by node data.
 231
 232          :param node: Information about a DUT node.
 233          :type node: dict
 234          :raises HoneycombError: If the configuration could not be changed.
 235          """
 236
 237         find = "restconf-binding-address"
 238         try:
 239             IPv6Address(unicode(node["host"]))
 240             # if management IP of the node is in IPv6 format
 241             replace = '\\"restconf-binding-address\\": \\"0::0\\",'
 242         except (AttributeError, AddressValueError):
 243             replace = '\\"restconf-binding-address\\": \\"0.0.0.0\\",'
 244
 245         argument = '"/{0}/c\\ {1}"'.format(find, replace)
 246         path = "{0}/config/restconf.json".format(Const.REMOTE_HC_DIR)
 247         command = "sed -i {0} {1}".format(argument, path)
 248
 249         ssh = SSH()
 250         ssh.connect(node)
 251         (ret_code, _, stderr) = ssh.exec_command_sudo(command)
 252         if ret_code != 0:
 253             raise HoneycombError("Failed to modify configuration on "
 254                                  "node {0}, {1}".format(node, stderr))
 255
 256     @staticmethod
 257     def configure_jvpp_timeout(node, timeout=10):
 258         """Configure timeout value for Java API commands Honeycomb sends to VPP.
 259
 260          :param node: Information about a DUT node.
 261          :param timeout: Timeout value in seconds.
 262          :type node: dict
 263          :type timeout: int
 264          :raises HoneycombError: If the configuration could not be changed.
 265          """
 266
 267         find = "jvpp-request-timeout"
 268         replace = '\\"jvpp-request-timeout\\": {0}'.format(timeout)
 269
 270         argument = '"/{0}/c\\ {1}"'.format(find, replace)
 271         path = "{0}/config/jvpp.json".format(Const.REMOTE_HC_DIR)
 272         command = "sed -i {0} {1}".format(argument, path)
 273
 274         ssh = SSH()
 275         ssh.connect(node)
 276         (ret_code, _, stderr) = ssh.exec_command_sudo(command)
 277         if ret_code != 0:
 278             raise HoneycombError("Failed to modify configuration on "
 279                                  "node {0}, {1}".format(node, stderr))
 280
 281     @staticmethod
 282     def print_environment(nodes):
 283         """Print information about the nodes to log. The information is defined
 284         by commands in cmds tuple at the beginning of this method.
 285
 286         :param nodes: List of DUT nodes to get information about.
 287         :type nodes: list
 288         """
 289
 290         # TODO: When everything is set and running in VIRL env, transform this
 291         # method to a keyword checking the environment.
 292
 293         cmds = ("uname -a",
 294                 "df -lh",
 295                 "echo $JAVA_HOME",
 296                 "echo $PATH",
 297                 "which java",
 298                 "java -version",
 299                 "dpkg --list | grep openjdk",
 300                 "ls -la /opt/honeycomb",
 301                 "cat /opt/honeycomb/modules/*module-config")
 302
 303         for node in nodes:
 304             if node['type'] == NodeType.DUT:
 305                 logger.info("Checking node {} ...".format(node['host']))
 306                 for cmd in cmds:
 307                     logger.info("Command: {}".format(cmd))
 308                     ssh = SSH()
 309                     ssh.connect(node)
 310                     ssh.exec_command_sudo(cmd)
 311
 312     @staticmethod
 313     def print_ports(node):
 314         """Uses "sudo netstat -anp | grep java" to print port where a java
 315         application listens.
 316
 317         :param node: Honeycomb node where we want to print the ports.
 318         :type node: dict
 319         """
 320
 321         cmds = ("netstat -anp | grep java",
 322                 "ps -ef | grep [h]oneycomb")
 323
 324         logger.info("Checking node {} ...".format(node['host']))
 325         for cmd in cmds:
 326             logger.info("Command: {}".format(cmd))
 327             ssh = SSH()
 328             ssh.connect(node)
 329             ssh.exec_command_sudo(cmd)
 330
 331     @staticmethod
 332     def configure_log_level(node, level):
 333         """Set Honeycomb logging to the specified level.
 334
 335         :param node: Honeycomb node.
 336         :param level: Log level (INFO, DEBUG, TRACE).
 337         :type node: dict
 338         :type level: str
 339         """
 340
 341         find = 'logger name=\\"io.fd\\"'
 342         replace = '<logger name=\\"io.fd\\" level=\\"{0}\\"/>'.format(level)
 343
 344         argument = '"/{0}/c\\ {1}"'.format(find, replace)
 345         path = "{0}/config/logback.xml".format(Const.REMOTE_HC_DIR)
 346         command = "sed -i {0} {1}".format(argument, path)
 347
 348         ssh = SSH()
 349         ssh.connect(node)
 350         (ret_code, _, stderr) = ssh.exec_command_sudo(command)
 351         if ret_code != 0:
 352             raise HoneycombError("Failed to modify configuration on "
 353                                  "node {0}, {1}".format(node, stderr))
 354
 355     @staticmethod
 356     def manage_honeycomb_features(node, feature, disable=False):
 357         """Configure Honeycomb to use features that are disabled by default, or
 358         disable previously enabled features.
 359
 360         ..Note:: If the module is not enabled in VPP, Honeycomb will
 361         be unable to establish VPP connection.
 362
 363         :param node: Honeycomb node.
 364         :param feature: Feature to enable.
 365         :param disable: Disable the specified feature instead of enabling it.
 366         :type node: dict
 367         :type feature: string
 368         :type disable: bool
 369         :raises HoneycombError: If the configuration could not be changed.
 370          """
 371
 372         disabled_features = {
 373             "NSH": ["io.fd.hc2vpp.vppnsh.impl.VppNshModule"],
 374             "BGP": ["io.fd.hc2vpp.bgp.inet.BgpInetModule",
 375                     "io.fd.honeycomb.infra.bgp.BgpModule",
 376                     "io.fd.honeycomb.infra.bgp.BgpReadersModule",
 377                     "io.fd.honeycomb.infra.bgp.BgpWritersModule",
 378                     "io.fd.honeycomb.northbound.bgp.extension.InetModule",
 379                     "io.fd.honeycomb.northbound.bgp.extension.EvpnModule",
 380                     "io.fd.honeycomb.northbound.bgp.extension.L3VpnV4Module",
 381                     "io.fd.honeycomb.northbound.bgp.extension.L3VpnV6Module",
 382                     "io.fd.honeycomb.northbound.bgp.extension."
 383                     "LabeledUnicastModule",
 384                     "io.fd.honeycomb.northbound.bgp.extension.LinkstateModule"]
 385         }
 386
 387         ssh = SSH()
 388         ssh.connect(node)
 389
 390         if feature in disabled_features.keys():
 391             # for every module, uncomment by replacing the entire line
 392             for item in disabled_features[feature]:
 393                 find = replace = "{0}".format(item)
 394                 if disable:
 395                     replace = "// {0}".format(find)
 396
 397                 argument = '"/{0}/c\\ {1}"'.format(find, replace)
 398                 path = "{0}/modules/*module-config"\
 399                     .format(Const.REMOTE_HC_DIR)
 400                 command = "sed -i {0} {1}".format(argument, path)
 401
 402                 (ret_code, _, stderr) = ssh.exec_command_sudo(command)
 403                 if ret_code != 0:
 404                     raise HoneycombError("Failed to modify configuration on "
 405                                          "node {0}, {1}".format(node, stderr))
 406         else:
 407             raise HoneycombError(
 408                 "Unrecognized feature {0}.".format(feature))
 409
 410     @staticmethod
 411     def copy_java_libraries(node):
 412         """Copy Java libraries installed by vpp-api-java package to honeycomb
 413         lib folder.
 414
 415         This is a (temporary?) workaround for jvpp version mismatches.
 416
 417         :param node: Honeycomb node
 418         :type node: dict
 419         """
 420
 421         ssh = SSH()
 422         ssh.connect(node)
 423         (_, stdout, _) = ssh.exec_command_sudo(
 424             "ls /usr/share/java | grep ^jvpp-*")
 425
 426         files = stdout.split("\n")[:-1]
 427         for item in files:
 428             # example filenames:
 429             # jvpp-registry-17.04.jar
 430             # jvpp-core-17.04.jar
 431
 432             parts = item.split("-")
 433             version = "{0}-SNAPSHOT".format(parts[2][:5])
 434             artifact_id = "{0}-{1}".format(parts[0], parts[1])
 435
 436             directory = "{0}/lib/io/fd/vpp/{1}/{2}".format(
 437                 Const.REMOTE_HC_DIR, artifact_id, version)
 438             cmd = "sudo mkdir -p {0}; " \
 439                   "sudo cp /usr/share/java/{1} {0}/{2}-{3}.jar".format(
 440                       directory, item, artifact_id, version)
 441
 442             (ret_code, _, stderr) = ssh.exec_command(cmd)
 443             if ret_code != 0:
 444                 raise HoneycombError("Failed to copy JVPP libraries on "
 445                                      "node {0}, {1}".format(node, stderr))
 446
 447     @staticmethod
 448     def copy_odl_client(node, odl_name, src_path, dst_path):
 449         """Copy ODL Client from source path to destination path.
 450
 451         :param node: Honeycomb node.
 452         :param odl_name: Name of ODL client version to use.
 453         :param src_path: Source Path where to find ODl client.
 454         :param dst_path: Destination path.
 455         :type node: dict
 456         :type odl_name: str
 457         :type src_path: str
 458         :type dst_path: str
 459         :raises HoneycombError: If the operation fails.
 460         """
 461
 462         ssh = SSH()
 463         ssh.connect(node)
 464
 465         cmd = "sudo rm -rf {dst}/*karaf_{odl_name} && " \
 466               "cp -r {src}/*karaf_{odl_name}* {dst}".format(
 467                   src=src_path, odl_name=odl_name, dst=dst_path)
 468
 469         ret_code, _, _ = ssh.exec_command_sudo(cmd, timeout=180)
 470         if int(ret_code) != 0:
 471             raise HoneycombError(
 472                 "Failed to copy ODL client on node {0}".format(node["host"]))
 473
 474     @staticmethod
 475     def setup_odl_client(node, path):
 476         """Start ODL client on the specified node.
 477
 478         Karaf should be located in the provided path, and VPP and Honeycomb
 479         should already be running, otherwise the start will fail.
 480         :param node: Node to start ODL client on.
 481         :param path: Path to ODL client on node.
 482         :type node: dict
 483         :type path: str
 484         :raises HoneycombError: If Honeycomb fails to start.
 485         """
 486
 487         logger.console("\nStarting ODL client ...")
 488         ssh = SSH()
 489         ssh.connect(node)
 490
 491         cmd = "{path}/*karaf*/bin/start clean".format(path=path)
 492         ret_code, _, _ = ssh.exec_command_sudo(cmd)
 493
 494         if int(ret_code) != 0:
 495             raise HoneycombError('Node {0} failed to start ODL.'.
 496                                  format(node['host']))
 497         else:
 498             logger.info("Starting the ODL client on node {0} is "
 499                         "in progress ...".format(node['host']))
 500
 501     @staticmethod
 502     def install_odl_features(node, path, *features):
 503         """Install required features on a running ODL client.
 504
 505         :param node: Honeycomb node.
 506         :param path: Path to ODL client on node.
 507         :param features: Optional, list of additional features to install.
 508         :type node: dict
 509         :type path: str
 510         :type features: list
 511         """
 512
 513         ssh = SSH()
 514         ssh.connect(node)
 515
 516         cmd = "{path}/*karaf*/bin/client -u karaf feature:install " \
 517               "odl-restconf-all " \
 518               "odl-netconf-connector-all " \
 519               "odl-netconf-topology".format(path=path)
 520         for feature in features:
 521             cmd += " {0}".format(feature)
 522
 523         ret_code, _, _ = ssh.exec_command_sudo(cmd, timeout=250)
 524
 525         if int(ret_code) != 0:
 526             raise HoneycombError("Feature install did not succeed.")
 527
 528     @staticmethod
 529     def check_odl_startup_state(node):
 530         """Check the status of ODL client startup.
 531
 532         :param node: Honeycomb node.
 533         :param node: dict
 534         :returns: True when ODL is started.
 535         :rtype: bool
 536         :raises HoneycombError: When the response is not code 200: OK.
 537         """
 538
 539         path = HcUtil.read_path_from_url_file(
 540             "odl_client/odl_netconf_connector")
 541         expected_status_codes = (HTTPCodes.UNAUTHORIZED,
 542                                  HTTPCodes.FORBIDDEN,
 543                                  HTTPCodes.NOT_FOUND,
 544                                  HTTPCodes.SERVICE_UNAVAILABLE,
 545                                  HTTPCodes.INTERNAL_SERVER_ERROR)
 546
 547         status_code, _ = HTTPRequest.get(node, path, timeout=10,
 548                                          enable_logging=False)
 549         if status_code == HTTPCodes.OK:
 550             logger.info("ODL client on node {0} is up and running".
 551                         format(node['host']))
 552         elif status_code in expected_status_codes:
 553             if status_code == HTTPCodes.UNAUTHORIZED:
 554                 logger.info('Unauthorized. If this triggers keyword '
 555                             'timeout, verify username and password.')
 556             raise HoneycombError('ODL client on node {0} running but '
 557                                  'not yet ready.'.format(node['host']),
 558                                  enable_logging=False)
 559         else:
 560             raise HoneycombError('Unexpected return code: {0}.'.
 561                                  format(status_code))
 562         return True
 563
 564     @staticmethod
 565     def check_odl_shutdown_state(node):
 566         """Check the status of ODL client shutdown.
 567
 568         :param node: Honeycomb node.
 569         :type node: dict
 570         :returns: True when ODL is stopped.
 571         :rtype: bool
 572         :raises HoneycombError: When the response is not code 200: OK.
 573         """
 574
 575         cmd = "pgrep -f karaf"
 576         path = HcUtil.read_path_from_url_file(
 577             "odl_client/odl_netconf_connector")
 578
 579         try:
 580             HTTPRequest.get(node, path, timeout=10, enable_logging=False)
 581             raise HoneycombError("ODL client is still running.")
 582         except HTTPRequestError:
 583             logger.debug("Connection refused, checking process state....")
 584             ssh = SSH()
 585             ssh.connect(node)
 586             ret_code, _, _ = ssh.exec_command(cmd)
 587             if ret_code == 0:
 588                 raise HoneycombError("ODL client is still running.")
 589
 590         return True
 591
 592     @staticmethod
 593     def mount_honeycomb_on_odl(node):
 594         """Tell ODL client to mount Honeycomb instance over netconf.
 595
 596         :param node: Honeycomb node.
 597         :type node: dict
 598         :raises HoneycombError: When the response is not code 200: OK.
 599         """
 600
 601         path = HcUtil.read_path_from_url_file(
 602             "odl_client/odl_netconf_connector")
 603
 604         url_file = "{0}/{1}".format(Const.RESOURCES_TPL_HC,
 605                                     "odl_client/mount_honeycomb.json")
 606
 607         with open(url_file) as template:
 608             data = template.read()
 609
 610         data = loads(data)
 611
 612         status_code, _ = HTTPRequest.post(
 613             node,
 614             path,
 615             headers={"Content-Type": "application/json",
 616                      "Accept": "text/plain"},
 617             json=data,
 618             timeout=10,
 619             enable_logging=False)
 620
 621         if status_code == HTTPCodes.OK:
 622             logger.info("ODL mount point configured successfully.")
 623         elif status_code == HTTPCodes.CONFLICT:
 624             logger.info("ODL mount point was already configured.")
 625         else:
 626             raise HoneycombError('Mount point configuration not successful')
 627
 628     @staticmethod
 629     def stop_odl_client(node, path):
 630         """Stop ODL client service on the specified node.
 631
 632         :param node: Node to start ODL client on.
 633         :param path: Path to ODL client.
 634         :type node: dict
 635         :type path: str
 636         :raises HoneycombError: If ODL client fails to stop.
 637         """
 638
 639         ssh = SSH()
 640         ssh.connect(node)
 641
 642         cmd = "{0}/*karaf*/bin/stop".format(path)
 643
 644         ssh = SSH()
 645         ssh.connect(node)
 646         ret_code, _, _ = ssh.exec_command_sudo(cmd)
 647         if int(ret_code) != 0:
 648             logger.debug("ODL Client refused to shut down.")
 649             cmd = "pkill -f 'karaf'"
 650             (ret_code, _, _) = ssh.exec_command_sudo(cmd)
 651             if int(ret_code) != 0:
 652                 raise HoneycombError('Node {0} failed to stop ODL.'.
 653                                      format(node['host']))
 654
 655         logger.info("ODL client service stopped.")
 656
 657     @staticmethod
 658     def set_static_arp(node, ip_address, mac_address):
 659         """Configure a static ARP entry using arp.
 660
 661         :param node: Node in topology.
 662         :param ip_address: IP address for the entry.
 663         :param mac_address: MAC adddress for the entry.
 664         :type node: dict
 665         :type ip_address: str
 666         :type mac_address: str
 667         :raises RuntimeError: If the operation fails.
 668         """
 669
 670         ssh = SSH()
 671         ssh.connect(node)
 672         ret_code, _, _ = ssh.exec_command_sudo("arp -s {0} {1}".format(
 673             ip_address, mac_address))
 674
 675         if ret_code != 0:
 676             raise RuntimeError("Failed to configure static ARP adddress.")
 677
 678
 679 class HoneycombStartupConfig(object):
 680     """Generator for Honeycomb startup configuration.
 681     """
 682     def __init__(self):
 683         """Initializer."""
 684
 685         self.template = """#!/bin/sh -
 686         STATUS=100
 687
 688         while [ $STATUS -eq 100 ]
 689         do
 690           {java_call} -jar $(dirname $0)/{jar_filename}
 691           STATUS=$?
 692           echo "Honeycomb exited with status: $STATUS"
 693           if [ $STATUS -eq 100 ]
 694           then
 695             echo "Restarting..."
 696           fi
 697         done
 698         """
 699
 700         self.java_call = "{scheduler} {affinity} java{jit_mode}{params}"
 701
 702         self.scheduler = ""
 703         self.core_affinity = ""
 704         self.jit_mode = ""
 705         self.params = ""
 706         self.numa = ""
 707
 708         self.config = ""
 709         self.ssh = SSH()
 710
 711     def apply_config(self, node):
 712         """Generate configuration file /opt/honeycomb/honeycomb on the specified
 713          node.
 714
 715          :param node: Honeycomb node.
 716          :type node: dict
 717          """
 718
 719         self.ssh.connect(node)
 720         _, filename, _ = self.ssh.exec_command("ls /opt/honeycomb | grep .jar")
 721
 722         java_call = self.java_call.format(scheduler=self.scheduler,
 723                                           affinity=self.core_affinity,
 724                                           jit_mode=self.jit_mode,
 725                                           params=self.params)
 726         self.config = self.template.format(java_call=java_call,
 727                                            jar_filename=filename)
 728
 729         self.ssh.connect(node)
 730         cmd = "echo '{config}' > /tmp/honeycomb " \
 731               "&& chmod +x /tmp/honeycomb " \
 732               "&& sudo mv -f /tmp/honeycomb /opt/honeycomb".\
 733             format(config=self.config)
 734         self.ssh.exec_command(cmd)
 735
 736     def set_cpu_scheduler(self, scheduler="FIFO"):
 737         """Use alternate CPU scheduler.
 738
 739         Note: OTHER scheduler doesn't load-balance over isolcpus.
 740
 741         :param scheduler: CPU scheduler to use.
 742         :type scheduler: str
 743         """
 744
 745         schedulers = {"FIFO": "-f 99",  # First In, First Out
 746                       "RR": "-r 99",  # Round Robin
 747                       "OTHER": "-o",  # Ubuntu default
 748                      }
 749         self.scheduler = "chrt {0}".format(schedulers[scheduler])
 750
 751     def set_cpu_core_affinity(self, low, high=None):
 752         """Set core affinity for the honeycomb process and subprocesses.
 753
 754         :param low: Lowest core ID number.
 755         :param high: Highest core ID number. Leave empty to use a single core.
 756         :type low: int
 757         :type high: int
 758         """
 759
 760         self.core_affinity = "taskset -c {low}-{high}".format(
 761             low=low, high=high if high else low)
 762
 763     def set_jit_compiler_mode(self, jit_mode):
 764         """Set running mode for Java's JIT compiler.
 765
 766         :param jit_mode: Desiret JIT mode.
 767         :type jit_mode: str
 768         """
 769
 770         modes = {"client": " -client",  # Default
 771                  "server": " -server",  # Higher performance but longer warmup
 772                  "classic": " -classic"  # Disables JIT compiler
 773                 }
 774
 775         self.jit_mode = modes[jit_mode]
 776
 777     def set_memory_size(self, mem_min, mem_max=None):
 778         """Set minimum and maximum memory use for the JVM.
 779
 780         :param mem_min: Minimum amount of memory (MB).
 781         :param mem_max: Maximum amount of memory (MB). Default is 4 times
 782         minimum value.
 783         :type mem_min: int
 784         :type mem_max: int
 785         """
 786
 787         self.params += " -Xms{min}m -Xmx{max}m".format(
 788             min=mem_min, max=mem_max if mem_max else mem_min*4)
 789
 790     def set_metaspace_size(self, mem_min, mem_max=None):
 791         """Set minimum and maximum memory used for class metadata in the JVM.
 792
 793         :param mem_min: Minimum metaspace size (MB).
 794         :param mem_max: Maximum metaspace size (MB). Defailt is 4 times
 795         minimum value.
 796         :type mem_min: int
 797         :type mem_max: int
 798         """
 799
 800         self.params += " -XX:MetaspaceSize={min}m " \
 801                        "-XX:MaxMetaspaceSize={max}m".format(
 802                            min=mem_min, max=mem_max if mem_max else mem_min*4)
 803
 804     def set_numa_optimization(self):
 805         """Use optimization of memory use and garbage collection for NUMA
 806         architectures."""
 807
 808         self.params += " -XX:+UseNUMA -XX:+UseParallelGC"
 809
 810     def set_ssh_security_provider(self):
 811         """Disables BouncyCastle for SSHD."""
 812         # Workaround for issue described in:
 813         # https://wiki.fd.io/view/Honeycomb/Releases/1609/Honeycomb_and_ODL
 814
 815         self.params += " -Dorg.apache.sshd.registerBouncyCastle=false"