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#!/usr/bin/env python2 |
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# -*- coding: utf-8 -*- |
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import os |
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import sys |
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import signal |
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import argparse |
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import subprocess |
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import logging |
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import time as t |
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from smartdispatch import utils |
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from smartdispatch.command_manager import CommandManager |
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def parse_arguments(): |
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parser = argparse.ArgumentParser() |
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parser.add_argument('commands_filename', type=str, help='File containing all commands to execute.') |
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parser.add_argument('logs_dir', type=str, help="Folder where to put commands' stdout and stderr.") |
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parser.add_argument('-r', '--assumeResumable', action='store_true', help="Assume that commands are resumable and put them into the pending list on worker termination.") |
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args = parser.parse_args() |
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# Check for invalid arguments |
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if not os.path.isfile(args.commands_filename): |
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parser.error("Invalid file path. Specify path to a file containing commands.") |
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if not os.path.isdir(args.logs_dir): |
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parser.error("You need to specify the folder path where to put command' stdout and stderr.") |
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return args |
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def main(): |
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# Necessary if we want 'logging.info' to appear in stderr. |
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logging.root.setLevel(logging.INFO) |
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args = parse_arguments() |
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command_manager = CommandManager(args.commands_filename) |
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if args.assumeResumable: |
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# Handle TERM signal gracefully by sending running commands back to |
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# the list of pending commands. |
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# NOTE: There are several cases when the handler will not have |
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# up-to-date information on running the command and/or process, |
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# but chances of that happening are VERY slim and the |
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# consequences are not fatal. |
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def sigterm_handler(signal, frame): |
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if sigterm_handler.triggered: |
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return |
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else: |
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sigterm_handler.triggered = True |
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error_code = 0 |
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if sigterm_handler.proc is not None: |
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error_code = sigterm_handler.proc.wait() |
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if sigterm_handler.command is not None: |
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if error_code == 0: # The command was terminated successfully. |
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command_manager.set_running_command_as_pending(sigterm_handler.command) |
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else: |
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command_manager.set_running_command_as_finished(sigterm_handler.command, error_code) |
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sys.exit(0) |
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sigterm_handler.triggered = False |
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sigterm_handler.command = None |
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sigterm_handler.proc = None |
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signal.signal(signal.SIGTERM, sigterm_handler) |
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while True: |
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command = command_manager.get_command_to_run() |
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if args.assumeResumable: |
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sigterm_handler.proc = None |
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sigterm_handler.command = command |
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if command is None: |
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break |
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uid = utils.generate_uid_from_string(command) |
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stdout_filename = os.path.join(args.logs_dir, uid + ".out") |
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stderr_filename = os.path.join(args.logs_dir, uid + ".err") |
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# Get job and node ID |
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job_id = os.environ.get('PBS_JOBID', 'undefined') |
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node_name = os.environ.get('HOSTNAME', 'undefined') |
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with open(stdout_filename, 'a') as stdout_file: |
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with open(stderr_filename, 'a') as stderr_file: |
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log_datetime = t.strftime("## SMART-DISPATCH - Started on: %Y-%m-%d %H:%M:%S - In job: {job_id} - On nodes: {node_name} ##\n".format(job_id=job_id, node_name=node_name)) |
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if stdout_file.tell() > 0: # Not the first line in the log file. |
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log_datetime = t.strftime("\n## SMART-DISPATCH - Resumed on: %Y-%m-%d %H:%M:%S - In job: {job_id} - On nodes: {node_name} ##\n".format(job_id=job_id, node_name=node_name)) |
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log_command = "## SMART-DISPATCH - Command: " + command + '\n' |
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stdout_file.write(log_datetime + log_command) |
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stdout_file.flush() |
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stderr_file.write(log_datetime + log_command) |
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stderr_file.flush() |
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proc = subprocess.Popen(command, stdout=stdout_file, stderr=stderr_file, shell=True) |
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if args.assumeResumable: |
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sigterm_handler.proc = proc |
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error_code = proc.wait() |
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command_manager.set_running_command_as_finished(command, error_code) |
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if __name__ == '__main__': |
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main() |
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SMART-Lab /
smartdispatch
