1 # Copyright (c) 2019 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:
6 # http://www.apache.org/licenses/LICENSE-2.0
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.
14 """Python API executor library.
27 from pprint import pformat
28 from robot.api import logger
30 from resources.libraries.python.Constants import Constants
31 from resources.libraries.python.LocalExecution import run
32 from resources.libraries.python.FilteredLogger import FilteredLogger
33 from resources.libraries.python.PythonThree import raise_from
34 from resources.libraries.python.PapiHistory import PapiHistory
35 from resources.libraries.python.ssh import (
36 SSH, SSHTimeout, exec_cmd_no_error, scp_node)
37 from resources.libraries.python.topology import Topology, SocketType
38 from resources.libraries.python.VppApiCrc import VppApiCrcChecker
41 __all__ = ["PapiExecutor", "PapiSocketExecutor"]
45 """A helper method, to make namedtuple-like object accessible as dict.
47 If the object is namedtuple-like, its _asdict() form is returned,
48 but in the returned object __getitem__ method is wrapped
49 to dictize also any items returned.
50 If the object does not have _asdict, it will be returned without any change.
51 Integer keys still access the object as tuple.
53 A more useful version would be to keep obj mostly as a namedtuple,
54 just add getitem for string keys. Unfortunately, namedtuple inherits
55 from tuple, including its read-only __getitem__ attribute,
56 so we cannot monkey-patch it.
58 TODO: Create a proxy for namedtuple to allow that.
60 :param obj: Arbitrary object to dictize.
62 :returns: Dictized object.
63 :rtype: same as obj type or collections.OrderedDict
65 if not hasattr(obj, "_asdict"):
68 old_get = ret.__getitem__
69 new_get = lambda self, key: dictize(old_get(self, key))
70 ret.__getitem__ = new_get
74 class PapiSocketExecutor(object):
75 """Methods for executing VPP Python API commands on forwarded socket.
77 The current implementation connects for the duration of resource manager.
78 Delay for accepting connection is 10s, and disconnect is explicit.
79 TODO: Decrease 10s to value that is long enough for creating connection
80 and short enough to not affect performance.
82 The current implementation downloads and parses .api.json files only once
83 and stores a VPPApiClient instance (disconnected) as a class variable.
84 Accessing multiple nodes with different APIs is therefore not supported.
86 The current implementation seems to run into read error occasionally.
87 Not sure if the error is in Python code on Robot side, ssh forwarding,
88 or socket handling at VPP side. Anyway, reconnect after some sleep
89 seems to help, hoping repeated command execution does not lead to surprises.
90 The reconnection is logged at WARN level, so it is prominently shown
91 in log.html, so we can see how frequently it happens.
93 TODO: Support sockets in NFs somehow.
94 TODO: Support handling of retval!=0 without try/except in caller.
96 Note: Use only with "with" statement, e.g.:
98 with PapiSocketExecutor(node) as papi_exec:
99 reply = papi_exec.add('show_version').get_reply(err_msg)
101 This class processes two classes of VPP PAPI methods:
102 1. Simple request / reply: method='request'.
103 2. Dump functions: method='dump'.
105 Note that access to VPP stats over socket is not supported yet.
107 The recommended ways of use are (examples):
109 1. Simple request / reply
111 a. One request with no arguments:
113 with PapiSocketExecutor(node) as papi_exec:
114 reply = papi_exec.add('show_version').get_reply(err_msg)
116 b. Three requests with arguments, the second and the third ones are the same
117 but with different arguments.
119 with PapiSocketExecutor(node) as papi_exec:
120 replies = papi_exec.add(cmd1, **args1).add(cmd2, **args2).\
121 add(cmd2, **args3).get_replies(err_msg)
125 cmd = 'sw_interface_rx_placement_dump'
126 with PapiSocketExecutor(node) as papi_exec:
127 details = papi_exec.add(cmd, sw_if_index=ifc['vpp_sw_index']).\
131 # Class cache for reuse between instances.
133 """Takes long time to create, stores all PAPI functions and types."""
135 """Accesses .api.json files at creation, caching allows deleting them."""
137 def __init__(self, node, remote_vpp_socket=Constants.SOCKSVR_PATH):
138 """Store the given arguments, declare managed variables.
140 :param node: Node to connect to and forward unix domain socket from.
141 :param remote_vpp_socket: Path to remote socket to tunnel to.
143 :type remote_vpp_socket: str
146 self._remote_vpp_socket = remote_vpp_socket
147 # The list of PAPI commands to be executed on the node.
148 self._api_command_list = list()
149 # The following values are set on enter, reset on exit.
150 self._temp_dir = None
151 self._ssh_control_socket = None
152 self._local_vpp_socket = None
153 self.initialize_vpp_instance()
155 def initialize_vpp_instance(self):
156 """Create VPP instance with bindings to API calls, store as class field.
158 No-op if the instance had been stored already.
160 The instance is initialized for unix domain socket access,
161 it has initialized all the bindings, but it is not connected
162 (to a local socket) yet.
164 This method downloads .api.json files from self._node
165 into a temporary directory, deletes them finally.
167 if self.vpp_instance:
169 cls = self.__class__ # Shorthand for setting class fields.
171 tmp_dir = tempfile.mkdtemp(dir="/tmp")
173 # Pack, copy and unpack Python part of VPP installation from _node.
174 # TODO: Use rsync or recursive version of ssh.scp_node instead?
176 exec_cmd_no_error(node, ["rm", "-rf", "/tmp/papi.txz"])
177 # Papi python version depends on OS (and time).
178 # Python 2.7 or 3.4, site-packages or dist-packages.
179 installed_papi_glob = "/usr/lib/python*/*-packages/vpp_papi"
180 # We need to wrap this command in bash, in order to expand globs,
181 # and as ssh does join, the inner command has to be quoted.
182 inner_cmd = " ".join([
183 "tar", "cJf", "/tmp/papi.txz", "--exclude=*.pyc",
184 installed_papi_glob, "/usr/share/vpp/api"])
185 exec_cmd_no_error(node, ["bash", "-c", "'" + inner_cmd + "'"])
186 scp_node(node, tmp_dir + "/papi.txz", "/tmp/papi.txz", get=True)
187 run(["tar", "xf", tmp_dir + "/papi.txz", "-C", tmp_dir])
188 api_json_directory = tmp_dir + "/usr/share/vpp/api"
189 # Perform initial checks before .api.json files are gone,
190 # by creating the checker instance.
191 cls.crc_checker = VppApiCrcChecker(api_json_directory)
192 # When present locally, we finally can find the installation path.
193 package_path = glob.glob(tmp_dir + installed_papi_glob)[0]
194 # Package path has to be one level above the vpp_papi directory.
195 package_path = package_path.rsplit('/', 1)[0]
196 sys.path.append(package_path)
197 # pylint: disable=import-error
198 from vpp_papi.vpp_papi import VPPApiClient as vpp_class
199 vpp_class.apidir = api_json_directory
200 # We need to create instance before removing from sys.path.
201 cls.vpp_instance = vpp_class(
202 use_socket=True, server_address="TBD", async_thread=False,
203 read_timeout=14, logger=FilteredLogger(logger, "INFO"))
204 # Cannot use loglevel parameter, robot.api.logger lacks support.
205 # TODO: Stop overriding read_timeout when VPP-1722 is fixed.
207 shutil.rmtree(tmp_dir)
208 if sys.path[-1] == package_path:
212 """Create a tunnel, connect VPP instance.
214 Only at this point a local socket names are created
215 in a temporary directory, because VIRL runs 3 pybots at once,
216 so harcoding local filenames does not work.
219 :rtype: PapiSocketExecutor
221 # Parsing takes longer than connecting, prepare instance before tunnel.
222 vpp_instance = self.vpp_instance
224 self._temp_dir = tempfile.mkdtemp(dir="/tmp")
225 self._local_vpp_socket = self._temp_dir + "/vpp-api.sock"
226 self._ssh_control_socket = self._temp_dir + "/ssh.sock"
227 ssh_socket = self._ssh_control_socket
228 # Cleanup possibilities.
229 ret_code, _ = run(["ls", ssh_socket], check=False)
231 # This branch never seems to be hit in CI,
232 # but may be useful when testing manually.
233 run(["ssh", "-S", ssh_socket, "-O", "exit", "0.0.0.0"],
234 check=False, log=True)
235 # TODO: Is any sleep necessary? How to prove if not?
236 run(["sleep", "0.1"])
237 run(["rm", "-vrf", ssh_socket])
238 # Even if ssh can perhaps reuse this file,
239 # we need to remove it for readiness detection to work correctly.
240 run(["rm", "-rvf", self._local_vpp_socket])
241 # On VIRL, the ssh user is not added to "vpp" group,
242 # so we need to change remote socket file access rights.
244 node, "chmod o+rwx " + self._remote_vpp_socket, sudo=True)
245 # We use sleep command. The ssh command will exit in 10 second,
246 # unless a local socket connection is established,
247 # in which case the ssh command will exit only when
248 # the ssh connection is closed again (via control socket).
249 # The log level is to supress "Warning: Permanently added" messages.
251 "ssh", "-S", ssh_socket, "-M",
252 "-o", "LogLevel=ERROR", "-o", "UserKnownHostsFile=/dev/null",
253 "-o", "StrictHostKeyChecking=no", "-o", "ExitOnForwardFailure=yes",
254 "-L", self._local_vpp_socket + ':' + self._remote_vpp_socket,
255 "-p", str(node['port']), node['username'] + "@" + node['host'],
257 priv_key = node.get("priv_key")
259 # This is tricky. We need a file to pass the value to ssh command.
260 # And we need ssh command, because paramiko does not suport sockets
261 # (neither ssh_socket, nor _remote_vpp_socket).
262 key_file = tempfile.NamedTemporaryFile()
263 key_file.write(priv_key)
264 # Make sure the content is written, but do not close yet.
266 ssh_cmd[1:1] = ["-i", key_file.name]
267 password = node.get("password")
269 # Prepend sshpass command to set password.
270 ssh_cmd[:0] = ["sshpass", "-p", password]
271 time_stop = time.time() + 10.0
272 # subprocess.Popen seems to be the best way to run commands
273 # on background. Other ways (shell=True with "&" and ssh with -f)
274 # seem to be too dependent on shell behavior.
275 # In particular, -f does NOT return values for run().
276 subprocess.Popen(ssh_cmd)
277 # Check socket presence on local side.
278 while time.time() < time_stop:
279 # It can take a moment for ssh to create the socket file.
280 ret_code, _ = run(["ls", "-l", self._local_vpp_socket], check=False)
285 raise RuntimeError("Local side socket has not appeared.")
287 # Socket up means the key has been read. Delete file by closing it.
289 # Everything is ready, set the local socket address and connect.
290 vpp_instance.transport.server_address = self._local_vpp_socket
291 # It seems we can get read error even if every preceding check passed.
292 # Single retry seems to help.
295 vpp_instance.connect_sync("csit_socket")
296 except IOError as err:
297 logger.warn("Got initial connect error {err!r}".format(err=err))
298 vpp_instance.disconnect()
302 raise RuntimeError("Failed to connect to VPP over a socket.")
305 def __exit__(self, exc_type, exc_val, exc_tb):
306 """Disconnect the vpp instance, tear down the SHH tunnel.
308 Also remove the local sockets by deleting the temporary directory.
309 Arguments related to possible exception are entirely ignored.
311 self.vpp_instance.disconnect()
312 run(["ssh", "-S", self._ssh_control_socket, "-O", "exit", "0.0.0.0"],
314 shutil.rmtree(self._temp_dir)
316 def add(self, csit_papi_command, history=True, **kwargs):
317 """Add next command to internal command list; return self.
319 Unless disabled, new entry to papi history is also added at this point.
320 The argument name 'csit_papi_command' must be unique enough as it cannot
321 be repeated in kwargs.
322 The kwargs dict is deep-copied, so it is safe to use the original
323 with partial modifications for subsequent commands.
325 Any pending conflicts from .api.json processing are raised.
326 Then the command name is checked for known CRCs.
327 Unsupported commands raise an exception, as CSIT change
328 should not start using messages without making sure which CRCs
330 Each CRC issue is raised only once, so subsequent tests
331 can raise other issues.
333 :param csit_papi_command: VPP API command.
334 :param history: Enable/disable adding command to PAPI command history.
335 :param kwargs: Optional key-value arguments.
336 :type csit_papi_command: str
339 :returns: self, so that method chaining is possible.
340 :rtype: PapiSocketExecutor
341 :raises RuntimeError: If unverified or conflicting CRC is encountered.
343 self.crc_checker.report_initial_conflicts()
345 PapiHistory.add_to_papi_history(
346 self._node, csit_papi_command, **kwargs)
347 self.crc_checker.check_api_name(csit_papi_command)
348 self._api_command_list.append(
349 dict(api_name=csit_papi_command, api_args=copy.deepcopy(kwargs)))
352 def get_replies(self, err_msg="Failed to get replies."):
353 """Get replies from VPP Python API.
355 The replies are parsed into dict-like objects,
356 "retval" field is guaranteed to be zero on success.
358 :param err_msg: The message used if the PAPI command(s) execution fails.
360 :returns: Responses, dict objects with fields due to API and "retval".
362 :raises RuntimeError: If retval is nonzero, parsing or ssh error.
364 return self._execute(err_msg=err_msg)
366 def get_reply(self, err_msg="Failed to get reply."):
367 """Get reply from VPP Python API.
369 The reply is parsed into dict-like object,
370 "retval" field is guaranteed to be zero on success.
372 TODO: Discuss exception types to raise, unify with inner methods.
374 :param err_msg: The message used if the PAPI command(s) execution fails.
376 :returns: Response, dict object with fields due to API and "retval".
378 :raises AssertionError: If retval is nonzero, parsing or ssh error.
380 replies = self.get_replies(err_msg=err_msg)
381 if len(replies) != 1:
382 raise RuntimeError("Expected single reply, got {replies!r}".format(
386 def get_sw_if_index(self, err_msg="Failed to get reply."):
387 """Get sw_if_index from reply from VPP Python API.
389 Frequently, the caller is only interested in sw_if_index field
390 of the reply, this wrapper makes such call sites shorter.
392 TODO: Discuss exception types to raise, unify with inner methods.
394 :param err_msg: The message used if the PAPI command(s) execution fails.
396 :returns: Response, sw_if_index value of the reply.
398 :raises AssertionError: If retval is nonzero, parsing or ssh error.
400 reply = self.get_reply(err_msg=err_msg)
401 logger.trace("Getting index from {reply!r}".format(reply=reply))
402 return reply["sw_if_index"]
404 def get_details(self, err_msg="Failed to get dump details."):
405 """Get dump details from VPP Python API.
407 The details are parsed into dict-like objects.
408 The number of details per single dump command can vary,
409 and all association between details and dumps is lost,
410 so if you care about the association (as opposed to
411 logging everything at once for debugging purposes),
412 it is recommended to call get_details for each dump (type) separately.
414 :param err_msg: The message used if the PAPI command(s) execution fails.
416 :returns: Details, dict objects with fields due to API without "retval".
419 return self._execute(err_msg)
422 def run_cli_cmd(node, cmd, log=True,
423 remote_vpp_socket=Constants.SOCKSVR_PATH):
424 """Run a CLI command as cli_inband, return the "reply" field of reply.
426 Optionally, log the field value.
428 :param node: Node to run command on.
429 :param cmd: The CLI command to be run on the node.
430 :param remote_vpp_socket: Path to remote socket to tunnel to.
431 :param log: If True, the response is logged.
433 :type remote_vpp_socket: str
436 :returns: CLI output.
441 err_msg = "Failed to run 'cli_inband {cmd}' PAPI command on host " \
442 "{host}".format(host=node['host'], cmd=cmd)
443 with PapiSocketExecutor(node, remote_vpp_socket) as papi_exec:
444 reply = papi_exec.add(cli, **args).get_reply(err_msg)["reply"]
447 "{cmd} ({host} - {remote_vpp_socket}):\n{reply}".
448 format(cmd=cmd, reply=reply,
449 remote_vpp_socket=remote_vpp_socket, host=node['host']))
453 def run_cli_cmd_on_all_sockets(node, cmd, log=True):
454 """Run a CLI command as cli_inband, on all sockets in topology file.
456 :param node: Node to run command on.
457 :param cmd: The CLI command to be run on the node.
458 :param log: If True, the response is logged.
463 sockets = Topology.get_node_sockets(node, socket_type=SocketType.PAPI)
465 for socket in sockets.values():
466 PapiSocketExecutor.run_cli_cmd(
467 node, cmd, log=log, remote_vpp_socket=socket)
470 def dump_and_log(node, cmds):
471 """Dump and log requested information, return None.
473 :param node: DUT node.
474 :param cmds: Dump commands to be executed.
476 :type cmds: list of str
478 with PapiSocketExecutor(node) as papi_exec:
480 dump = papi_exec.add(cmd).get_details()
481 logger.debug("{cmd}:\n{data}".format(
482 cmd=cmd, data=pformat(dump)))
484 def _execute(self, err_msg="Undefined error message"):
485 """Turn internal command list into data and execute; return replies.
487 This method also clears the internal command list.
490 Do not use this method in L1 keywords. Use:
496 :param err_msg: The message used if the PAPI command(s) execution fails.
498 :returns: Papi responses parsed into a dict-like object,
499 with fields due to API (possibly including retval).
501 :raises RuntimeError: If the replies are not all correct.
503 vpp_instance = self.vpp_instance
504 local_list = self._api_command_list
505 # Clear first as execution may fail.
506 self._api_command_list = list()
508 for command in local_list:
509 api_name = command["api_name"]
510 papi_fn = getattr(vpp_instance.api, api_name)
513 reply = papi_fn(**command["api_args"])
514 except IOError as err:
515 # Ocassionally an error happens, try reconnect.
516 logger.warn("Reconnect after error: {err!r}".format(
518 self.vpp_instance.disconnect()
519 # Testing showes immediate reconnect fails.
521 self.vpp_instance.connect_sync("csit_socket")
522 logger.trace("Reconnected.")
523 reply = papi_fn(**command["api_args"])
524 except (AttributeError, IOError) as err:
525 raise_from(AssertionError(err_msg), err, level="INFO")
526 # *_dump commands return list of objects, convert, ordinary reply.
527 if not isinstance(reply, list):
530 self.crc_checker.check_api_name(item.__class__.__name__)
531 dict_item = dictize(item)
532 if "retval" in dict_item.keys():
533 # *_details messages do not contain retval.
534 retval = dict_item["retval"]
536 # TODO: What exactly to log and raise here?
537 err = AssertionError("Retval {rv!r}".format(rv=retval))
538 # Lowering log level, some retval!=0 calls are expected.
539 # TODO: Expose level argument so callers can decide?
540 raise_from(AssertionError(err_msg), err, level="DEBUG")
541 replies.append(dict_item)
545 class PapiExecutor(object):
546 """Contains methods for executing VPP Python API commands on DUTs.
548 TODO: Remove .add step, make get_stats accept paths directly.
550 This class processes only one type of VPP PAPI methods: vpp-stats.
552 The recommended ways of use are (examples):
554 path = ['^/if', '/err/ip4-input', '/sys/node/ip4-input']
555 with PapiExecutor(node) as papi_exec:
556 stats = papi_exec.add(api_name='vpp-stats', path=path).get_stats()
558 print('RX interface core 0, sw_if_index 0:\n{0}'.\
559 format(stats[0]['/if/rx'][0][0]))
564 path_2 = ['^/if', '/err/ip4-input', '/sys/node/ip4-input']
565 with PapiExecutor(node) as papi_exec:
566 stats = papi_exec.add('vpp-stats', path=path_1).\
567 add('vpp-stats', path=path_2).get_stats()
569 print('RX interface core 0, sw_if_index 0:\n{0}'.\
570 format(stats[1]['/if/rx'][0][0]))
572 Note: In this case, when PapiExecutor method 'add' is used:
573 - its parameter 'csit_papi_command' is used only to keep information
574 that vpp-stats are requested. It is not further processed but it is
575 included in the PAPI history this way:
576 vpp-stats(path=['^/if', '/err/ip4-input', '/sys/node/ip4-input'])
577 Always use csit_papi_command="vpp-stats" if the VPP PAPI method
579 - the second parameter must be 'path' as it is used by PapiExecutor
583 def __init__(self, node):
586 :param node: Node to run command(s) on.
590 # Node to run command(s) on.
593 # The list of PAPI commands to be executed on the node.
594 self._api_command_list = list()
600 self._ssh.connect(self._node)
602 raise RuntimeError("Cannot open SSH connection to host {host} to "
603 "execute PAPI command(s)".
604 format(host=self._node["host"]))
607 def __exit__(self, exc_type, exc_val, exc_tb):
608 self._ssh.disconnect(self._node)
610 def add(self, csit_papi_command="vpp-stats", history=True, **kwargs):
611 """Add next command to internal command list; return self.
613 The argument name 'csit_papi_command' must be unique enough as it cannot
614 be repeated in kwargs.
615 The kwargs dict is deep-copied, so it is safe to use the original
616 with partial modifications for subsequent commands.
618 :param csit_papi_command: VPP API command.
619 :param history: Enable/disable adding command to PAPI command history.
620 :param kwargs: Optional key-value arguments.
621 :type csit_papi_command: str
624 :returns: self, so that method chaining is possible.
628 PapiHistory.add_to_papi_history(
629 self._node, csit_papi_command, **kwargs)
630 self._api_command_list.append(dict(
631 api_name=csit_papi_command, api_args=copy.deepcopy(kwargs)))
634 def get_stats(self, err_msg="Failed to get statistics.", timeout=120,
635 socket=Constants.SOCKSTAT_PATH):
636 """Get VPP Stats from VPP Python API.
638 :param err_msg: The message used if the PAPI command(s) execution fails.
639 :param timeout: Timeout in seconds.
642 :returns: Requested VPP statistics.
645 paths = [cmd['api_args']['path'] for cmd in self._api_command_list]
646 self._api_command_list = list()
648 stdout = self._execute_papi(
649 paths, method='stats', err_msg=err_msg, timeout=timeout,
652 return json.loads(stdout)
655 def _process_api_data(api_d):
656 """Process API data for smooth converting to JSON string.
658 Apply binascii.hexlify() method for string values.
660 :param api_d: List of APIs with their arguments.
662 :returns: List of APIs with arguments pre-processed for JSON.
666 def process_value(val):
669 :param val: Value to be processed.
671 :returns: Processed value.
672 :rtype: dict or str or int
674 if isinstance(val, dict):
675 for val_k, val_v in val.iteritems():
676 val[str(val_k)] = process_value(val_v)
678 elif isinstance(val, list):
679 for idx, val_l in enumerate(val):
680 val[idx] = process_value(val_l)
683 return binascii.hexlify(val) if isinstance(val, str) else val
685 api_data_processed = list()
687 api_args_processed = dict()
688 for a_k, a_v in api["api_args"].iteritems():
689 api_args_processed[str(a_k)] = process_value(a_v)
690 api_data_processed.append(dict(api_name=api["api_name"],
691 api_args=api_args_processed))
692 return api_data_processed
694 def _execute_papi(self, api_data, method='request', err_msg="",
695 timeout=120, socket=None):
696 """Execute PAPI command(s) on remote node and store the result.
698 :param api_data: List of APIs with their arguments.
699 :param method: VPP Python API method. Supported methods are: 'request',
701 :param err_msg: The message used if the PAPI command(s) execution fails.
702 :param timeout: Timeout in seconds.
707 :returns: Stdout from remote python utility, to be parsed by caller.
709 :raises SSHTimeout: If PAPI command(s) execution has timed out.
710 :raises RuntimeError: If PAPI executor failed due to another reason.
711 :raises AssertionError: If PAPI command(s) execution has failed.
714 raise RuntimeError("No API data provided.")
716 json_data = json.dumps(api_data) \
717 if method in ("stats", "stats_request") \
718 else json.dumps(self._process_api_data(api_data))
720 sock = " --socket {socket}".format(socket=socket) if socket else ""
722 "{fw_dir}/{papi_provider} --method {method} --data '{json}'{socket}"
723 .format(fw_dir=Constants.REMOTE_FW_DIR,
724 papi_provider=Constants.RESOURCES_PAPI_PROVIDER,
725 method=method, json=json_data, socket=sock))
727 ret_code, stdout, _ = self._ssh.exec_command_sudo(
728 cmd=cmd, timeout=timeout, log_stdout_err=False)
729 # TODO: Fail on non-empty stderr?
731 logger.error("PAPI command(s) execution timeout on host {host}:"
732 "\n{apis}".format(host=self._node["host"],
735 except Exception as exc:
736 raise_from(RuntimeError(
737 "PAPI command(s) execution on host {host} "
738 "failed: {apis}".format(
739 host=self._node["host"], apis=api_data)), exc)
741 raise AssertionError(err_msg)