jman.py

#!/usr/bin/env python
# vim: set fileencoding=utf-8 :
# Andre Anjos <andre.anjos@idiap.ch>
# Wed 24 Aug 2011 16:13:31 CEST

"""A logging Idiap/SGE job manager
"""

__epilog__ = """ For a list of available commands:
  >>> %(prog)s --help

  For a list of options for a particular command:
  >>> %(prog)s <command> --help
"""

import os
import sys

import argparse
import logging

from ..tools import make_shell, logger
from .. import local, sge
from ..models import Status

def setup(args):
  """Returns the JobManager and sets up the basic infrastructure"""

  kwargs = {'wrapper_script' : args.wrapper_script, 'debug' : args.verbose==3, 'database' : args.database}
  if args.local:
    jm = local.JobManagerLocal(**kwargs)
  else:
    jm = sge.JobManagerSGE(**kwargs)

  # set-up logging
  if args.verbose not in range(0,4):
    raise ValueError("The verbosity level %d does not exist. Please reduce the number of '--verbose' parameters in your call to maximum 3" % level)

  # set up the verbosity level of the logging system
  log_level = {
      0: logging.ERROR,
      1: logging.WARNING,
      2: logging.INFO,
      3: logging.DEBUG
    }[args.verbose]

  handler = logging.StreamHandler()
  handler.setFormatter(logging.Formatter("%(asctime)s %(levelname)s %(name)s: %(message)s"))
  logger.addHandler(handler)
  logger.setLevel(log_level)

  return jm

def get_array(array):
  if array is None:
    return None
  start = array.find('-')
  if start == -1:
    a = 1
    b = int(array)
    c = 1
  else:
    a = int(array[0:start])
    step = array.find(':')
    if step == -1:
      b = int(array[start+1:])
      c = 1
    else:
      b = int(array[start+1:step])
      c = int(array[step+1])

  return (a,b,c)


def submit(args):
  """Submission command"""

  # set full path to command
  if args.job[0] == '--':
    del args.job[0]
  if not os.path.isabs(args.job[0]):
    args.job[0] = os.path.abspath(args.job[0])

  jm = setup(args)
  kwargs = {
      'queue': args.qname,
      'cwd': True,
      'name': args.name,
      'env': args.env,
      'memfree': args.memory,
      'hvmem': args.memory,
      'io_big': args.io_big,
      }

  if args.array is not None:         kwargs['array'] = get_array(args.array)
  if args.log_dir is not None:       kwargs['log_dir'] = args.log_dir
  if args.dependencies is not None:  kwargs['dependencies'] = args.dependencies
  kwargs['dry_run'] = args.dry_run
  kwargs['stop_on_failure'] = args.stop_on_failure

  # submit the job
  job_id = jm.submit(args.job, **kwargs)


def resubmit(args):
  """Re-submits the jobs with the given ids."""
  jm = setup(args)
  if not args.keep_logs:
    jm.delete(job_ids=args.job_ids, delete_jobs=False)
  jm.resubmit(args.job_ids, args.failed_only, args.running_jobs)


def run_scheduler(args):
  """Runs the scheduler on the local machine. To stop it, please use Ctrl-C."""
  if not args.local:
    raise ValueError("The execute command can only be used with the '--local' command line option")
  jm = setup(args)
  jm.run_scheduler(parallel_jobs=args.parallel, job_ids=args.job_ids, sleep_time=args.sleep_time, die_when_finished=args.die_when_finished, no_log=args.no_log_files)


def list(args):
  """Lists the jobs in the given database."""
  jm = setup(args)
  jm.list(job_ids=args.job_ids, print_array_jobs=args.print_array_jobs, print_dependencies=args.print_dependencies, long=args.verbose > 1)


def communicate(args):
  """Uses qstat to get the status of the requested jobs."""
  if args.local:
    raise ValueError("The communicate command can only be used without the '--local' command line option")
  jm = setup(args)
  jm.communicate(job_ids=args.job_ids)


def report(args):
  """Reports the results of the finished (and unfinished) jobs."""
  jm = setup(args)
  jm.report(job_ids=args.job_ids, array_ids=args.array_ids, unfinished=args.unfinished_also, output=not args.errors_only, error=not args.output_only)


def stop(args):
  """Stops (qdel's) the jobs with the given ids."""
  if args.local:
    raise ValueError("Stopping commands locally is not supported (please kill them yourself)")
  jm = setup(args)
  jm.stop_jobs(args.job_ids)


def delete(args):
  """Deletes the jobs from the job manager. If the jobs are still running in the grid, they are stopped."""
  jm = setup(args)
  # first, stop the jobs if they are running in the grid
  if not args.local and 'executing' in args.status:
    stop(args)
  # then, delete them from the database
  jm.delete(job_ids=args.job_ids, array_ids=args.array_ids, delete_logs=not args.keep_logs, delete_log_dir=not args.keep_log_dir, status=args.status)


def run_job(args):
  """Starts the wrapper script to execute a job, interpreting the JOB_ID and SGE_TASK_ID keywords that are set by the grid or by us."""
  jm = setup(args)
  job_id = int(os.environ['JOB_ID'])
  array_id = int(os.environ['SGE_TASK_ID']) if os.environ['SGE_TASK_ID'] != 'undefined' else None
  jm.run_job(job_id, array_id)


class AliasedSubParsersAction(argparse._SubParsersAction):
  """Hack taken from https://gist.github.com/471779 to allow aliases in
  argparse for python 2.x (this has been implemented on python 3.2)
  """

  class _AliasedPseudoAction(argparse.Action):
    def __init__(self, name, aliases, help):
      dest = name
      if aliases:
        dest += ' (%s)' % ','.join(aliases)
      sup = super(AliasedSubParsersAction._AliasedPseudoAction, self)
      sup.__init__(option_strings=[], dest=dest, help=help)

  def add_parser(self, name, **kwargs):
    if 'aliases' in kwargs:
      aliases = kwargs['aliases']
      del kwargs['aliases']
    else:
      aliases = []

    parser = super(AliasedSubParsersAction, self).add_parser(name, **kwargs)

    # Make the aliases work.
    for alias in aliases:
      self._name_parser_map[alias] = parser
    # Make the help text reflect them, first removing old help entry.
    if 'help' in kwargs:
      help = kwargs.pop('help')
      self._choices_actions.pop()
      pseudo_action = self._AliasedPseudoAction(name, aliases, help)
      self._choices_actions.append(pseudo_action)

    return parser


def main(command_line_options = None):

  from ..config import __version__

  parser = argparse.ArgumentParser(description=__doc__, epilog=__epilog__,
      formatter_class=argparse.ArgumentDefaultsHelpFormatter)
  # part of the hack to support aliases in subparsers
  parser.register('action', 'parsers', AliasedSubParsersAction)

  # general options
  parser.add_argument('-v', '--verbose', action = 'count', default = 0,
      help = "Increase the verbosity level from 0 (only error messages) to 1 (warnings), 2 (log messages), 3 (debug information) by adding the --verbose option as often as desired (e.g. '-vvv' for debug).")
  parser.add_argument('-V', '--version', action='version',
      version='GridTk version %s' % __version__)
  parser.add_argument('-d', '--database', '--db', metavar='DATABASE', default = 'submitted.sql3',
      help='replace the default database "submitted.sql3" by one provided by you.')

  parser.add_argument('-l', '--local', action='store_true',
        help = 'Uses the local job manager instead of the SGE one.')
  cmdparser = parser.add_subparsers(title='commands', help='commands accepted by %(prog)s')

  # subcommand 'submit'
  submit_parser = cmdparser.add_parser('submit', aliases=['sub'], help='Submits jobs to the SGE queue or to the local job scheduler and logs them in a database.')
  submit_parser.add_argument('-q', '--queue', metavar='QNAME', dest='qname', default='all.q', help='the name of the SGE queue to submit the job to')
  submit_parser.add_argument('-m', '--memory', help='Sets both the h_vmem and the mem_free parameters when submitting the job to the specified value, e.g. 8G to set the memory requirements to 8 gigabytes')
  submit_parser.add_argument('-n', '--name', dest='name', help='Gives the job a name')
  submit_parser.add_argument('-x', '--dependencies', type=int, default=[], metavar='ID', nargs='*', help='Set job dependencies to the list of job identifiers separated by spaces')
  submit_parser.add_argument('-k', '--stop-on-failure', action='store_true', help='Stop depending jobs when this job finished with an error.')
  submit_parser.add_argument('-l', '--log-dir', metavar='DIR', help='Sets the log directory. By default, "logs" is selected for the SGE. If the jobs are executed locally, by default the result is written to console.')
  submit_parser.add_argument('-s', '--environment', metavar='KEY=VALUE', dest='env', nargs='*', default=[], help='Passes specific environment variables to the job.')
  submit_parser.add_argument('-t', '--array', '--parametric', metavar='(first:)last(-step)', help='Creates a parametric (array) job. You must specify the last value, but first (default=1) and step (default=1) can be specified as well.')
  submit_parser.add_argument('-z', '--dry-run', action='store_true', help='Do not really submit anything, just print out what would submit in this case')
  submit_parser.add_argument('-I', '--io-big', action='store_true', help='Sets "io_big" on the submitted jobs so it limits the machines in which the job is submitted to those that can do high-throughput.')
  submit_parser.add_argument('job', metavar='command', nargs=argparse.REMAINDER, help = "The job that should be executed. Sometimes a -- is required to separate the job from other command line options.")
  submit_parser.set_defaults(func=submit)

  # subcommand 're-submit'
  resubmit_parser = cmdparser.add_parser('resubmit', aliases=['reset', 'requeue', 're'], help='Re-submits a list of jobs.')
  resubmit_parser.add_argument('-j', '--job-ids', metavar='ID', nargs='*', type=int, help='Re-submit only the jobs with the given ids (by default, all finished jobs are re-submitted).')
  resubmit_parser.add_argument('-k', '--keep-logs', action='store_true', help='Do not clean the log files of the old job before re-submitting.')
  resubmit_parser.add_argument('-f', '--failed-only', action='store_true', help='Re-submit only jobs that have failed.')
  resubmit_parser.add_argument('-a', '--running-jobs', action='store_true', help='Re-submit even jobs that are running or waiting (use this flag with care).')
  resubmit_parser.set_defaults(func=resubmit)

  # subcommand 'stop'
  stop_parser = cmdparser.add_parser('stop', help='Stops the execution of jobs in the grid.')
  stop_parser.add_argument('-j', '--job-ids', metavar='ID', nargs='*', type=int, help='Stop only the jobs with the given ids (by default, all jobs are stopped).')
  stop_parser.set_defaults(func=stop)

  # subcommand 'list'
  list_parser = cmdparser.add_parser('list', aliases=['ls'],  help='Lists jobs stored in the database. Use the -vv option to get a long listing.')
  list_parser.add_argument('-j', '--job-ids', metavar='ID', nargs='*', type=int, help='List only the jobs with the given ids (by default, all jobs are listed)')
  list_parser.add_argument('-a', '--print-array-jobs', action='store_true', help='Report only the jobs with the given array ids. If specified, a single job-id must be given as well.')
  list_parser.add_argument('-x', '--print-dependencies', action='store_true', help='Print the dependencies of the jobs as well.')
  list_parser.set_defaults(func=list)

  # subcommand 'communicate'
  stop_parser = cmdparser.add_parser('communicate', aliases = ['com'], help='Communicates with the grid to see if there were unexpected errors (e.g. a timeout) during the job execution.')
  stop_parser.add_argument('-j', '--job-ids', metavar='ID', nargs='*', type=int, help='Check only the jobs with the given ids (by default, all jobs are checked)')
  stop_parser.set_defaults(func=communicate)


  # subcommand 'report'
  report_parser = cmdparser.add_parser('report', aliases=['rep', 'r'], help='Iterates through the result and error log files and prints out the logs.')
  report_parser.add_argument('-e', '--errors-only', action='store_true', help='Only report the error logs (by default, both logs are reported).')
  report_parser.add_argument('-o', '--output-only', action='store_true', help='Only report the output logs  (by default, both logs are reported).')
  report_parser.add_argument('-u', '--unfinished-also', action='store_true', help='Report also the unfinished jobs; use this option also to check error files for jobs with success status.')
  report_parser.add_argument('-j', '--job-ids', metavar='ID', nargs='*', type=int, help='Report only the jobs with the given ids (by default, all finished jobs are reported)')
  report_parser.add_argument('-a', '--array-ids', metavar='ID', nargs='*', type=int, help='Report only the jobs with the given array ids. If specified, a single job-id must be given as well.')
  report_parser.set_defaults(func=report)

  # subcommand 'delete'
  delete_parser = cmdparser.add_parser('delete', aliases=['del', 'rm', 'remove'], help='removes jobs from the database; if jobs are running or are still scheduled in SGE, the jobs are also removed from the SGE queue.')
  delete_parser.add_argument('-j', '--job-ids', metavar='ID', nargs='*', type=int, help='Delete only the jobs with the given ids (by default, all jobs are deleted).')
  delete_parser.add_argument('-a', '--array-ids', metavar='ID', nargs='*', type=int, help='Delete only the jobs with the given array ids. If specified, a single job-id must be given as well. Note that the whole job including all array jobs will be removed from the SGE queue.')
  delete_parser.add_argument('-r', '--keep-logs', action='store_true', help='If set, the log files will NOT be removed.')
  delete_parser.add_argument('-R', '--keep-log-dir', action='store_true', help='When removing the logs, keep the log directory.')
  delete_parser.add_argument('-s', '--status', nargs='+', choices = Status, default = Status, help='Delete only jobs that have the given statuses; by default all jobs are deleted.')
  delete_parser.set_defaults(func=delete)

  # subcommand 'run_scheduler'
  scheduler_parser = cmdparser.add_parser('run-scheduler', aliases=['sched', 'x'], help='Runs the scheduler on the local machine. To stop the scheduler safely, please use Ctrl-C; only valid in combination with the \'--local\' option.')
  scheduler_parser.add_argument('-p', '--parallel', type=int, default=1, help='Select the number of parallel jobs that you want to execute locally')
  scheduler_parser.add_argument('-j', '--job-ids', metavar='ID', nargs='*', type=int, help='Select the job ids that should be run (be default, all submitted and queued jobs are run).')
  scheduler_parser.add_argument('-s', '--sleep-time', type=float, default=0.1, help='Set the sleep time between for the scheduler in seconds.')
  scheduler_parser.add_argument('-x', '--die-when-finished', action='store_true', help='Let the job manager die when it has finished all jobs of the database.')
  scheduler_parser.add_argument('-l', '--no-log-files', action='store_true', help='Overwrites the log file setup to print the results to the console.')
  scheduler_parser.set_defaults(func=run_scheduler)


  # subcommand 'run-job'; this should not be seen on the command line since it is actually a wrapper script
  run_parser = cmdparser.add_parser('run-job', help=argparse.SUPPRESS)
  run_parser.set_defaults(func=run_job)


  if command_line_options:
    args = parser.parse_args(command_line_options[1:])
    args.wrapper_script = command_line_options[0]
  else:
    args = parser.parse_args()
    args.wrapper_script = sys.argv[0]

  args.func(args)

  return 0