1 #!/usr/bin/python 2 # Copyright (c) 2014 The Chromium OS Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 """This script will run optimize table for chromeos_autotest_db 7 8 This script might have notable impact on the mysql performance as it locks 9 tables and rebuilds indexes. So be careful when running it on production 10 systems. 11 """ 12 13 import argparse 14 import logging 15 import socket 16 import subprocess 17 import sys 18 19 import common 20 from autotest_lib.frontend import database_settings_helper 21 from autotest_lib.scheduler import email_manager 22 from autotest_lib.server import utils 23 24 # Format Appears as: [Date] [Time] - [Msg Level] - [Message] 25 LOGGING_FORMAT = '%(asctime)s - %(levelname)s - %(message)s' 26 STATS_KEY = 'db_optimize.%s' % socket.gethostname() 27 28 def main_without_exception_handling(): 29 database_settings = database_settings_helper.get_default_db_config() 30 command = ['mysqlcheck', 31 '-o', database_settings['NAME'], 32 '-u', database_settings['USER'], 33 '-p%s' % database_settings['PASSWORD'], 34 # we want to do db optimation on each master/slave 35 # in rotation. Do not write otimize table to bin log 36 # so that it won't be picked up by slaves automatically 37 '--skip-write-binlog', 38 ] 39 subprocess.check_call(command) 40 41 42 def should_optimize(): 43 """Check if the server should run db_optimize. 44 45 Only shard should optimize db. 46 47 @returns: True if it should optimize db otherwise False. 48 """ 49 return utils.is_shard() 50 51 52 def parse_args(): 53 """Parse command line arguments""" 54 parser = argparse.ArgumentParser() 55 parser.add_argument('-c', '--check_server', action='store_true', 56 help='Check if the server should optimize db.') 57 return parser.parse_args() 58 59 60 def main(): 61 """Main.""" 62 args = parse_args() 63 64 logging.basicConfig(level=logging.INFO, format=LOGGING_FORMAT) 65 logging.info('Calling: %s', sys.argv) 66 67 if args.check_server and not should_optimize(): 68 print 'Only shard can run db optimization.' 69 return 70 71 try: 72 main_without_exception_handling() 73 except Exception as e: 74 message = 'Uncaught exception; terminating db_optimize.' 75 email_manager.manager.log_stacktrace(message) 76 logging.exception(message) 77 raise 78 finally: 79 email_manager.manager.send_queued_emails() 80 logging.info('db_optimize completed.') 81 82 83 if __name__ == '__main__': 84 main() 85