| #!/usr/bin/env python3 |
| # -*- coding: utf-8 -*- |
| # |
| # Copyright 2019 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """This module controls locking and unlocking of test machines.""" |
| |
| from __future__ import print_function |
| |
| import argparse |
| import enum |
| import getpass |
| import os |
| import sys |
| |
| import file_lock_machine |
| |
| from cros_utils import command_executer |
| from cros_utils import logger |
| from cros_utils import machines |
| |
| |
| class LockException(Exception): |
| """Base class for exceptions in this module.""" |
| |
| |
| class MachineNotPingable(LockException): |
| """Raised when machine does not respond to ping.""" |
| |
| |
| class LockingError(LockException): |
| """Raised when server fails to lock/unlock machine as requested.""" |
| |
| |
| class DontOwnLock(LockException): |
| """Raised when user attmepts to unlock machine locked by someone else.""" |
| # This should not be raised if the user specified '--force' |
| |
| |
| class MachineType(enum.Enum): |
| """Enum class to hold machine type.""" |
| LOCAL = 'local' |
| SKYLAB = 'skylab' |
| |
| |
| class LockManager(object): |
| """Class for locking/unlocking machines vie three different modes. |
| |
| This class contains methods for checking the locked status of machines, |
| and for changing the locked status. It handles HW lab machines and local |
| machines, using appropriate locking mechanisms for each. |
| """ |
| |
| SKYLAB_PATH = 'skylab' |
| |
| # TODO(zhizhouy): lease time may needs to be dynamically adjusted. For now we |
| # set it long enough to cover the period to finish nightly rotation tests. |
| LEASE_MINS = 1439 |
| |
| SKYLAB_CREDENTIAL = ('/usr/local/google/home/mobiletc-prebuild' |
| '/sheriff_utils/credentials/skylab' |
| '/chromeos-swarming-credential.json') |
| SWARMING = 'chromite/third_party/swarming.client/swarming.py' |
| SUCCESS = 0 |
| |
| def __init__(self, |
| remotes, |
| force_option, |
| chromeos_root, |
| locks_dir='', |
| log=None): |
| """Initializes an LockManager object. |
| |
| Args: |
| remotes: A list of machine names or ip addresses to be managed. Names |
| and ip addresses should be represented as strings. If the list is |
| empty, the lock manager will get all known machines. |
| force_option: A Boolean indicating whether or not to force an unlock of |
| a machine that was locked by someone else. |
| chromeos_root: The ChromeOS chroot to use for the autotest scripts. |
| locks_dir: A directory used for file locking local devices. |
| log: If not None, this is the logger object to be used for writing out |
| informational output messages. It is expected to be an instance of |
| Logger class from cros_utils/logger.py. |
| """ |
| self.chromeos_root = chromeos_root |
| self.user = getpass.getuser() |
| self.logger = log or logger.GetLogger() |
| self.ce = command_executer.GetCommandExecuter(self.logger) |
| |
| sys.path.append(chromeos_root) |
| |
| self.locks_dir = locks_dir |
| |
| self.machines = list(set(remotes)) or [] |
| self.toolchain_lab_machines = self.GetAllToolchainLabMachines() |
| |
| if not self.machines: |
| self.machines = self.toolchain_lab_machines |
| self.force = force_option |
| |
| self.local_machines = [] |
| self.skylab_machines = [] |
| |
| def CheckMachine(self, machine, error_msg): |
| """Verifies that machine is responding to ping. |
| |
| Args: |
| machine: String containing the name or ip address of machine to check. |
| error_msg: Message to print if ping fails. |
| |
| Raises: |
| MachineNotPingable: If machine is not responding to 'ping' |
| """ |
| if not machines.MachineIsPingable(machine, logging_level='none'): |
| cros_machine = machine + '.cros' |
| if not machines.MachineIsPingable(cros_machine, logging_level='none'): |
| raise MachineNotPingable(error_msg) |
| |
| def GetAllToolchainLabMachines(self): |
| """Gets a list of all the toolchain machines in the ChromeOS HW lab. |
| |
| Returns: |
| A list of names of the toolchain machines in the ChromeOS HW lab. |
| """ |
| machines_file = os.path.join( |
| os.path.dirname(__file__), 'crosperf', 'default_remotes') |
| machine_list = [] |
| with open(machines_file, 'r') as input_file: |
| lines = input_file.readlines() |
| for line in lines: |
| _, remotes = line.split(':') |
| remotes = remotes.strip() |
| for r in remotes.split(): |
| machine_list.append(r.strip()) |
| return machine_list |
| |
| def GetMachineType(self, m): |
| """Get where the machine is located. |
| |
| Args: |
| m: String containing the name or ip address of machine. |
| |
| Returns: |
| Value of the type in MachineType Enum. |
| """ |
| if m in self.local_machines: |
| return MachineType.LOCAL |
| if m in self.skylab_machines: |
| return MachineType.SKYLAB |
| |
| def PrintStatusHeader(self): |
| """Prints the status header lines for machines.""" |
| print('\nMachine (Board)\t\t\t\t\tStatus') |
| print('---------------\t\t\t\t\t------') |
| |
| def PrintStatus(self, m, state, machine_type): |
| """Prints status for a single machine. |
| |
| Args: |
| m: String containing the name or ip address of machine. |
| state: A dictionary of the current state of the machine. |
| machine_type: MachineType to determine where the machine is located. |
| """ |
| if state['locked']: |
| print('%s (%s)\t\t%slocked by %s since %s' % |
| (m, state['board'], '\t\t' if machine_type == MachineType.LOCAL else |
| '', state['locked_by'], state['lock_time'])) |
| else: |
| print( |
| '%s (%s)\t\t%sunlocked' % (m, state['board'], '\t\t' if |
| machine_type == MachineType.LOCAL else '')) |
| |
| def AddMachineToLocal(self, machine): |
| """Adds a machine to local machine list. |
| |
| Args: |
| machine: The machine to be added. |
| """ |
| if machine not in self.local_machines: |
| self.local_machines.append(machine) |
| |
| def AddMachineToSkylab(self, machine): |
| """Adds a machine to skylab machine list. |
| |
| Args: |
| machine: The machine to be added. |
| """ |
| if machine not in self.skylab_machines: |
| self.skylab_machines.append(machine) |
| |
| def ListMachineStates(self, machine_states): |
| """Gets and prints the current status for a list of machines. |
| |
| Prints out the current status for all of the machines in the current |
| LockManager's list of machines (set when the object is initialized). |
| |
| Args: |
| machine_states: A dictionary of the current state of every machine in |
| the current LockManager's list of machines. Normally obtained by |
| calling LockManager::GetMachineStates. |
| """ |
| self.PrintStatusHeader() |
| for m in machine_states: |
| machine_type = self.GetMachineType(m) |
| state = machine_states[m] |
| self.PrintStatus(m, state, machine_type) |
| |
| def UpdateLockInSkylab(self, should_lock_machine, machine): |
| """Ask skylab to lease/release a machine. |
| |
| Args: |
| should_lock_machine: Boolean indicating whether to lock the machine (True) |
| or unlock the machine (False). |
| machine: The machine to update. |
| |
| Returns: |
| True if requested action succeeded, else False. |
| """ |
| try: |
| if should_lock_machine: |
| ret = self.LeaseSkylabMachine(machine) |
| else: |
| ret = self.ReleaseSkylabMachine(machine) |
| except Exception: |
| return False |
| return ret |
| |
| def UpdateFileLock(self, should_lock_machine, machine): |
| """Use file lock for local machines, |
| |
| Args: |
| should_lock_machine: Boolean indicating whether to lock the machine (True) |
| or unlock the machine (False). |
| machine: The machine to update. |
| |
| Returns: |
| True if requested action succeeded, else False. |
| """ |
| try: |
| if should_lock_machine: |
| ret = file_lock_machine.Machine(machine, self.locks_dir).Lock( |
| True, sys.argv[0]) |
| else: |
| ret = file_lock_machine.Machine(machine, self.locks_dir).Unlock(True) |
| except Exception: |
| return False |
| return ret |
| |
| def UpdateMachines(self, lock_machines): |
| """Sets the locked state of the machines to the requested value. |
| |
| The machines updated are the ones in self.machines (specified when the |
| class object was intialized). |
| |
| Args: |
| lock_machines: Boolean indicating whether to lock the machines (True) or |
| unlock the machines (False). |
| |
| Returns: |
| A list of the machines whose state was successfully updated. |
| """ |
| updated_machines = [] |
| action = 'Locking' if lock_machines else 'Unlocking' |
| for m in self.machines: |
| # TODO(zhizhouy): Handling exceptions with more details when locking |
| # doesn't succeed. |
| machine_type = self.GetMachineType(m) |
| if machine_type == MachineType.SKYLAB: |
| ret = self.UpdateLockInSkylab(lock_machines, m) |
| elif machine_type == MachineType.LOCAL: |
| ret = self.UpdateFileLock(lock_machines, m) |
| |
| if ret: |
| self.logger.LogOutput( |
| '%s %s machine succeeded: %s.' % (action, machine_type.value, m)) |
| updated_machines.append(m) |
| else: |
| self.logger.LogOutput( |
| '%s %s machine failed: %s.' % (action, machine_type.value, m)) |
| |
| self.machines = updated_machines |
| return updated_machines |
| |
| def _InternalRemoveMachine(self, machine): |
| """Remove machine from internal list of machines. |
| |
| Args: |
| machine: Name of machine to be removed from internal list. |
| """ |
| # Check to see if machine is lab machine and if so, make sure it has |
| # ".cros" on the end. |
| cros_machine = machine |
| if machine.find('rack') > 0 and machine.find('row') > 0: |
| if machine.find('.cros') == -1: |
| cros_machine = cros_machine + '.cros' |
| |
| self.machines = [ |
| m for m in self.machines if m not in (cros_machine, machine) |
| ] |
| |
| def CheckMachineLocks(self, machine_states, cmd): |
| """Check that every machine in requested list is in the proper state. |
| |
| If the cmd is 'unlock' verify that every machine is locked by requestor. |
| If the cmd is 'lock' verify that every machine is currently unlocked. |
| |
| Args: |
| machine_states: A dictionary of the current state of every machine in |
| the current LockManager's list of machines. Normally obtained by |
| calling LockManager::GetMachineStates. |
| cmd: The user-requested action for the machines: 'lock' or 'unlock'. |
| |
| Raises: |
| DontOwnLock: The lock on a requested machine is owned by someone else. |
| """ |
| for k, state in machine_states.items(): |
| if cmd == 'unlock': |
| if not state['locked']: |
| self.logger.LogWarning('Attempt to unlock already unlocked machine ' |
| '(%s).' % k) |
| self._InternalRemoveMachine(k) |
| |
| # TODO(zhizhouy): Skylab doesn't support host info such as locked_by. |
| # Need to update this when skylab supports it. |
| if (state['locked'] and state['locked_by'] and |
| state['locked_by'] != self.user): |
| raise DontOwnLock('Attempt to unlock machine (%s) locked by someone ' |
| 'else (%s).' % (k, state['locked_by'])) |
| elif cmd == 'lock': |
| if state['locked']: |
| self.logger.LogWarning( |
| 'Attempt to lock already locked machine (%s)' % k) |
| self._InternalRemoveMachine(k) |
| |
| def GetMachineStates(self, cmd=''): |
| """Gets the current state of all the requested machines. |
| |
| Gets the current state of all the requested machines. Stores the data in a |
| dictionary keyed by machine name. |
| |
| Args: |
| cmd: The command for which we are getting the machine states. This is |
| important because if one of the requested machines is missing we raise |
| an exception, unless the requested command is 'add'. |
| |
| Returns: |
| A dictionary of machine states for all the machines in the LockManager |
| object. |
| """ |
| machine_list = {} |
| for m in self.machines: |
| # For local or skylab machines, we simply set {'locked': status} for them |
| # TODO(zhizhouy): This is a quick fix since skylab cannot return host info |
| # as afe does. We need to get more info such as locked_by when skylab |
| # supports that. |
| values = { |
| 'locked': 0 if cmd == 'lock' else 1, |
| 'board': '??', |
| 'locked_by': '', |
| 'lock_time': '' |
| } |
| machine_list[m] = values |
| |
| self.ListMachineStates(machine_list) |
| |
| return machine_list |
| |
| def CheckMachineInSkylab(self, machine): |
| """Run command to check if machine is in Skylab or not. |
| |
| Returns: |
| True if machine in skylab, else False |
| """ |
| credential = '' |
| if os.path.exists(self.SKYLAB_CREDENTIAL): |
| credential = '--auth-service-account-json %s' % self.SKYLAB_CREDENTIAL |
| swarming = os.path.join(self.chromeos_root, self.SWARMING) |
| # TODO(zhizhouy): Swarming script doesn't support python3 so explicitly |
| # launch it with python2 until migrated. |
| cmd = (('python2 %s ' \ |
| 'query --swarming https://chromeos-swarming.appspot.com ' \ |
| "%s 'bots/list?is_dead=FALSE&dimensions=dut_name:%s'") % \ |
| (swarming, |
| credential, |
| machine.rstrip('.cros'))) |
| exit_code, stdout, stderr = self.ce.RunCommandWOutput(cmd) |
| if exit_code: |
| raise ValueError( |
| 'Querying bots failed (2); stdout: %r; stderr: %r' % (stdout, stderr)) |
| |
| # The command will return a json output as stdout. If machine not in skylab |
| # stdout will look like this: |
| # { |
| # "death_timeout": "600", |
| # "now": "TIMESTAMP" |
| # } |
| # Otherwise there will be a tuple starting with 'items', we simply detect |
| # this keyword for result. |
| return 'items' in stdout |
| |
| def LeaseSkylabMachine(self, machine): |
| """Run command to lease dut from skylab. |
| |
| Returns: |
| True if succeeded, False if failed. |
| """ |
| credential = '' |
| if os.path.exists(self.SKYLAB_CREDENTIAL): |
| credential = '-service-account-json %s' % self.SKYLAB_CREDENTIAL |
| cmd = (('%s lease-dut -minutes %s %s %s') % \ |
| (self.SKYLAB_PATH, |
| self.LEASE_MINS, |
| credential, |
| machine.rstrip('.cros'))) |
| # Wait 120 seconds for server to start the lease task, if not started, |
| # we will treat it as unavailable. |
| check_interval_time = 120 |
| retval = self.ce.RunCommand(cmd, command_timeout=check_interval_time) |
| return retval == self.SUCCESS |
| |
| def ReleaseSkylabMachine(self, machine): |
| """Run command to release dut from skylab. |
| |
| Returns: |
| True if succeeded, False if failed. |
| """ |
| credential = '' |
| if os.path.exists(self.SKYLAB_CREDENTIAL): |
| credential = '-service-account-json %s' % self.SKYLAB_CREDENTIAL |
| cmd = (('%s release-dut %s %s') % \ |
| (self.SKYLAB_PATH, |
| credential, |
| machine.rstrip('.cros'))) |
| retval = self.ce.RunCommand(cmd) |
| return retval == self.SUCCESS |
| |
| |
| def Main(argv): |
| """Parse the options, initialize lock manager and dispatch proper method. |
| |
| Args: |
| argv: The options with which this script was invoked. |
| |
| Returns: |
| 0 unless an exception is raised. |
| """ |
| parser = argparse.ArgumentParser() |
| |
| parser.add_argument( |
| '--list', |
| dest='cmd', |
| action='store_const', |
| const='status', |
| help='List current status of all known machines.') |
| parser.add_argument( |
| '--lock', |
| dest='cmd', |
| action='store_const', |
| const='lock', |
| help='Lock given machine(s).') |
| parser.add_argument( |
| '--unlock', |
| dest='cmd', |
| action='store_const', |
| const='unlock', |
| help='Unlock given machine(s).') |
| parser.add_argument( |
| '--status', |
| dest='cmd', |
| action='store_const', |
| const='status', |
| help='List current status of given machine(s).') |
| parser.add_argument( |
| '--remote', dest='remote', help='machines on which to operate') |
| parser.add_argument( |
| '--chromeos_root', |
| dest='chromeos_root', |
| required=True, |
| help='ChromeOS root to use for autotest scripts.') |
| parser.add_argument( |
| '--force', |
| dest='force', |
| action='store_true', |
| default=False, |
| help='Force lock/unlock of machines, even if not' |
| ' current lock owner.') |
| |
| options = parser.parse_args(argv) |
| |
| if not options.remote and options.cmd != 'status': |
| parser.error('No machines specified for operation.') |
| |
| if not os.path.isdir(options.chromeos_root): |
| parser.error('Cannot find chromeos_root: %s.' % options.chromeos_root) |
| |
| if not options.cmd: |
| parser.error('No operation selected (--list, --status, --lock, --unlock,' |
| ' --add_machine, --remove_machine).') |
| |
| machine_list = [] |
| if options.remote: |
| machine_list = options.remote.split() |
| |
| lock_manager = LockManager(machine_list, options.force, options.chromeos_root) |
| |
| machine_states = lock_manager.GetMachineStates(cmd=options.cmd) |
| cmd = options.cmd |
| |
| if cmd == 'status': |
| lock_manager.ListMachineStates(machine_states) |
| |
| elif cmd == 'lock': |
| if not lock_manager.force: |
| lock_manager.CheckMachineLocks(machine_states, cmd) |
| lock_manager.UpdateMachines(True) |
| |
| elif cmd == 'unlock': |
| if not lock_manager.force: |
| lock_manager.CheckMachineLocks(machine_states, cmd) |
| lock_manager.UpdateMachines(False) |
| |
| return 0 |
| |
| |
| if __name__ == '__main__': |
| sys.exit(Main(sys.argv[1:])) |
