X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FVatExecutor.py;h=7d03fcd4a6961e7f01cb2f5c233791cdd061a372;hp=aff8c361307737422447b1cdf6c0cdb2bacf5298;hb=c5c36999b9e0ac27fd3200568cd76a69134cfd4e;hpb=c662f5045a4812540fcc11006ae865351090035b diff --git a/resources/libraries/python/VatExecutor.py b/resources/libraries/python/VatExecutor.py index aff8c36130..7d03fcd4a6 100644 --- a/resources/libraries/python/VatExecutor.py +++ b/resources/libraries/python/VatExecutor.py @@ -1,4 +1,4 @@ -# Copyright (c) 2016 Cisco and/or its affiliates. +# Copyright (c) 2018 Cisco and/or its affiliates. # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at: @@ -10,181 +10,328 @@ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. -from ssh import SSH -from robot.api import logger -from constants import Constants + +"""VAT executor library.""" + import json +from paramiko.ssh_exception import SSHException +from robot.api import logger + +from resources.libraries.python.ssh import SSH, SSHTimeout +from resources.libraries.python.constants import Constants +from resources.libraries.python.VatHistory import VatHistory + __all__ = ['VatExecutor'] -def cleanup_vat_json_output(json_output): - """Return VAT json output cleaned from VAT clutter. +def cleanup_vat_json_output(json_output, vat_name=None): + """Return VAT JSON output cleaned from VAT clutter. + + Clean up VAT JSON output from clutter like vat# prompts and such. - Clean up VAT json output from clutter like vat# prompts and such - :param json_output: cluttered json output. - :return: cleaned up output json string + :param json_output: Cluttered JSON output. + :param vat_name: Name of the VAT script. + :type json_output: JSON + :type vat_name: str + :returns: Cleaned up output JSON string. + :rtype: JSON """ retval = json_output clutter = ['vat#', 'dump_interface_table error: Misc'] + if vat_name: + remote_file_path = '{0}/{1}/{2}'.format(Constants.REMOTE_FW_DIR, + Constants.RESOURCES_TPL_VAT, + vat_name) + clutter.append("{0}(2):".format(remote_file_path)) for garbage in clutter: retval = retval.replace(garbage, '') return retval -class VatExecutor(object): +def get_vpp_pid(node): + """Get PID of running VPP process. + + :param node: DUT node. + :type node: dict + :returns: PID of VPP process / List of PIDs if more VPP processes are + running on the DUT node. + :rtype: int or list + """ + import resources.libraries.python.DUTSetup as PidLib + pid = PidLib.DUTSetup.get_vpp_pid(node) + return pid + +class VatExecutor(object): + """Contains methods for executing VAT commands on DUTs.""" def __init__(self): self._stdout = None self._stderr = None self._ret_code = None - - def execute_script(self, vat_name, node, timeout=10, json_out=True): - """Copy local_path script to node, execute it and return result. - - :param vat_name: name of the vat script file. Only the file name of - the script is required, the resources path is prepended - automatically. - :param node: node to execute the VAT script on. - :param timeout: seconds to allow the script to run. - :param json_out: require json output. - :return: (rc, stdout, stderr) tuple. + self._script_name = None + + def execute_script(self, vat_name, node, timeout=120, json_out=True, + copy_on_execute=False): + """Execute VAT script on remote node, and store the result. There is an + option to copy script from local host to remote host before execution. + Path is defined automatically. + + :param vat_name: Name of the vat script file. Only the file name of + the script is required, the resources path is prepended automatically. + :param node: Node to execute the VAT script on. + :param timeout: Seconds to allow the script to run. + :param json_out: Require JSON output. + :param copy_on_execute: If true, copy the file from local host to remote + before executing. + :type vat_name: str + :type node: dict + :type timeout: int + :type json_out: bool + :type copy_on_execute: bool + :raises RuntimeError: If VAT script execution failed. """ - ssh = SSH() - ssh.connect(node) + try: + ssh.connect(node) + except: + raise SSHException("Cannot open SSH connection to execute VAT " + "command(s) from vat script {name}" + .format(name=vat_name)) + + if copy_on_execute: + ssh.scp(vat_name, vat_name) + remote_file_path = vat_name + else: + remote_file_path = '{0}/{1}/{2}'.format(Constants.REMOTE_FW_DIR, + Constants.RESOURCES_TPL_VAT, + vat_name) + + cmd = "{vat_bin} {json} in {vat_path} script".format( + vat_bin=Constants.VAT_BIN_NAME, + json="json" if json_out is True else "", + vat_path=remote_file_path) - remote_file_path = '{0}/{1}/{2}'.format(Constants.REMOTE_FW_DIR, - Constants.RESOURCES_TPL_VAT, - vat_name) - # TODO this overwrites the output if the vat script has been used twice - remote_file_out = remote_file_path + ".out" + try: + ret_code, stdout, stderr = ssh.exec_command_sudo(cmd=cmd, + timeout=timeout) + except SSHTimeout: + logger.error("VAT script execution timeout: {0}".format(cmd)) + raise + except: + raise RuntimeError("VAT script execution failed: {0}".format(cmd)) - cmd = "sudo -S {vat} {json} < {input}".format( - vat=Constants.VAT_BIN_NAME, - json="json" if json_out is True else "", - input=remote_file_path) - (ret_code, stdout, stderr) = ssh.exec_command(cmd, timeout) self._ret_code = ret_code self._stdout = stdout self._stderr = stderr - - logger.trace("Command '{0}' returned {1}'".format(cmd, self._ret_code)) - logger.trace("stdout: '{0}'".format(self._stdout)) - logger.trace("stderr: '{0}'".format(self._stderr)) - - # TODO: download vpe_api_test output file - # self._delete_files(node, remote_file_path, remote_file_out) - - def execute_script_json_out(self, vat_name, node, timeout=10,): + self._script_name = vat_name + + def execute_script_json_out(self, vat_name, node, timeout=120): + """Pass all arguments to 'execute_script' method, then cleanup returned + json output. + + :param vat_name: Name of the vat script file. Only the file name of + the script is required, the resources path is prepended automatically. + :param node: Node to execute the VAT script on. + :param timeout: Seconds to allow the script to run. + :type vat_name: str + :type node: dict + :type timeout: int + """ self.execute_script(vat_name, node, timeout, json_out=True) - self._stdout = cleanup_vat_json_output(self._stdout) - - def _delete_files(self, node, *files): - ssh = SSH() - ssh.connect(node) - files = " ".join([str(x) for x in files]) - ssh.exec_command("rm {0}".format(files)) + self._stdout = cleanup_vat_json_output(self._stdout, vat_name=vat_name) def script_should_have_failed(self): + """Read return code from last executed script and raise exception if the + script didn't fail.""" if self._ret_code is None: raise Exception("First execute the script!") if self._ret_code == 0: raise AssertionError( - "Script execution passed, but failure was expected") + "VAT Script execution passed, but failure was expected: {cmd}" + .format(cmd=self._script_name)) def script_should_have_passed(self): + """Read return code from last executed script and raise exception if the + script failed.""" if self._ret_code is None: raise Exception("First execute the script!") if self._ret_code != 0: raise AssertionError( - "Script execution failed, but success was expected") + "VAT Script execution failed, but success was expected: {cmd}" + .format(cmd=self._script_name)) def get_script_stdout(self): + """Returns value of stdout from last executed script.""" return self._stdout def get_script_stderr(self): + """Returns value of stderr from last executed script.""" return self._stderr @staticmethod def cmd_from_template(node, vat_template_file, **vat_args): """Execute VAT script on specified node. This method supports - script templates with parameters - :param node: node in topology on witch the scrtipt is executed - :param vat_template_file: template file of VAT script - :param vat_args: arguments to the template file - :return: list of json objects returned by VAT - """ - vat = VatTerminal(node) - ret = vat.vat_terminal_exec_cmd_from_template(vat_template_file, - **vat_args) - vat.vat_terminal_close() - return ret + script templates with parameters. - @staticmethod - def copy_config_to_remote(node, local_path, remote_path): - # TODO: will be removed once v4 is merged to master. - """Copies vat configuration file to node - - :param node: Remote node on which to copy the VAT configuration file - :param local_path: path of the VAT script on local device that launches - test cases. - :param remote_path: path on remote node where to copy the VAT - configuration script file + :param node: Node in topology on witch the script is executed. + :param vat_template_file: Template file of VAT script. + :param vat_args: Arguments to the template file. + :return: List of JSON objects returned by VAT. """ - ssh = SSH() - ssh.connect(node) - logger.trace("Removing old file {}".format(remote_path)) - ssh.exec_command_sudo("rm -f {}".format(remote_path)) - ssh.scp(local_path, remote_path) + with VatTerminal(node) as vat: + return vat.vat_terminal_exec_cmd_from_template(vat_template_file, + **vat_args) class VatTerminal(object): - """VAT interactive terminal + """VAT interactive terminal. + + :param node: Node to open VAT terminal on. + :param json_param: Defines if outputs from VAT are in JSON format. + Default is True. + :type node: dict + :type json_param: bool - :param node: Node to open VAT terminal on. """ - __VAT_PROMPT = "vat# " - __LINUX_PROMPT = ":~$ " + __VAT_PROMPT = ("vat# ", ) + __LINUX_PROMPT = (":~$ ", "~]$ ", "~]# ") - def __init__(self, node): + def __init__(self, node, json_param=True): + json_text = ' json' if json_param else '' + self.json = json_param + self._node = node self._ssh = SSH() - self._ssh.connect(node) - self._tty = self._ssh.interactive_terminal_open() - self._ssh.interactive_terminal_exec_command( - self._tty, - 'sudo -S {vat} json'.format(vat=Constants.VAT_BIN_NAME), - self.__VAT_PROMPT) + self._ssh.connect(self._node) + try: + self._tty = self._ssh.interactive_terminal_open() + except Exception: + raise RuntimeError("Cannot open interactive terminal on node {0}". + format(self._node)) + + for _ in range(3): + try: + self._ssh.interactive_terminal_exec_command( + self._tty, + 'sudo -S {0}{1}'.format(Constants.VAT_BIN_NAME, json_text), + self.__VAT_PROMPT) + except Exception: + continue + else: + break + else: + vpp_pid = get_vpp_pid(self._node) + if vpp_pid: + if isinstance(vpp_pid, int): + logger.trace("VPP running on node {0}". + format(self._node['host'])) + else: + logger.error("More instances of VPP running on node {0}.". + format(self._node['host'])) + else: + logger.error("VPP not running on node {0}.". + format(self._node['host'])) + raise RuntimeError("Failed to open VAT console on node {0}". + format(self._node['host'])) + + self._exec_failure = False + self.vat_stdout = None + + def __enter__(self): + return self + + def __exit__(self, exc_type, exc_val, exc_tb): + self.vat_terminal_close() def vat_terminal_exec_cmd(self, cmd): """Execute command on the opened VAT terminal. - :param cmd: Command to be executed. + :param cmd: Command to be executed. - :return: Command output in python representation of JSON format. + :return: Command output in python representation of JSON format or + None if not in JSON mode. """ - logger.debug("Executing command in VAT terminal: {}".format(cmd)); - out = self._ssh.interactive_terminal_exec_command(self._tty, - cmd, - self.__VAT_PROMPT) - logger.debug("VAT output: {}".format(out)); - json_out = json.loads(out) - return json_out + VatHistory.add_to_vat_history(self._node, cmd) + logger.debug("Executing command in VAT terminal: {0}".format(cmd)) + try: + out = self._ssh.interactive_terminal_exec_command(self._tty, cmd, + self.__VAT_PROMPT) + self.vat_stdout = out + except Exception: + self._exec_failure = True + vpp_pid = get_vpp_pid(self._node) + if vpp_pid: + if isinstance(vpp_pid, int): + raise RuntimeError("VPP running on node {0} but VAT command" + " {1} execution failed.". + format(self._node['host'], cmd)) + else: + raise RuntimeError("More instances of VPP running on node " + "{0}. VAT command {1} execution failed.". + format(self._node['host'], cmd)) + else: + raise RuntimeError("VPP not running on node {0}. VAT command " + "{1} execution failed.". + format(self._node['host'], cmd)) + + logger.debug("VAT output: {0}".format(out)) + if self.json: + obj_start = out.find('{') + obj_end = out.rfind('}') + array_start = out.find('[') + array_end = out.rfind(']') + + if obj_start == -1 and array_start == -1: + raise RuntimeError("VAT command {0}: no JSON data.".format(cmd)) + + if obj_start < array_start or array_start == -1: + start = obj_start + end = obj_end + 1 + else: + start = array_start + end = array_end + 1 + out = out[start:end] + json_out = json.loads(out) + return json_out + else: + return None def vat_terminal_close(self): """Close VAT terminal.""" - self._ssh.interactive_terminal_exec_command(self._tty, - 'quit', - self.__LINUX_PROMPT) - self._ssh.interactive_terminal_close(self._tty) + # interactive terminal is dead, we only need to close session + if not self._exec_failure: + try: + self._ssh.interactive_terminal_exec_command(self._tty, + 'quit', + self.__LINUX_PROMPT) + except Exception: + vpp_pid = get_vpp_pid(self._node) + if vpp_pid: + if isinstance(vpp_pid, int): + logger.trace("VPP running on node {0}.". + format(self._node['host'])) + else: + logger.error("More instances of VPP running on node " + "{0}.".format(self._node['host'])) + else: + logger.error("VPP not running on node {0}.". + format(self._node['host'])) + raise RuntimeError("Failed to close VAT console on node {0}". + format(self._node['host'])) + try: + self._ssh.interactive_terminal_close(self._tty) + except: + raise RuntimeError("Cannot close interactive terminal on node {0}". + format(self._node['host'])) def vat_terminal_exec_cmd_from_template(self, vat_template_file, **args): """Execute VAT script from a file. - :param vat_template_file: template file name of a VAT script - :param args: dictionary of parameters for VAT script - :return: list of json objects returned by VAT + + :param vat_template_file: Template file name of a VAT script. + :param args: Dictionary of parameters for VAT script. + :return: List of JSON objects returned by VAT. """ file_path = '{}/{}'.format(Constants.RESOURCES_TPL_VAT, vat_template_file)