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#!/usr/bin/env python
# Copyright 2013 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# 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
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, 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.
import argparse
import fcntl
import logging
import os
import signal
import subprocess
import sys
import time
import psutil
OLD_BASE_DIR = '/opt/stack/os-config-refresh'
DEFAULT_BASE_DIR = '/usr/libexec/os-refresh-config'
def default_base_dir():
"""Determine the default base directory path
If the OS_REFRESH_CONFIG_BASE_DIR environment variable is set,
use its value.
Otherwise, prefer the new default path, but still allow the old one for
backwards compatibility.
"""
base_dir = os.environ.get('OS_REFRESH_CONFIG_BASE_DIR')
if base_dir is None:
# NOTE(bnemec): Prefer the new location, but still allow the old one.
if os.path.isdir(OLD_BASE_DIR) and not os.path.isdir(DEFAULT_BASE_DIR):
logging.warning('Base directory %s is deprecated. The recommended '
'base directory is %s',
OLD_BASE_DIR, DEFAULT_BASE_DIR)
base_dir = OLD_BASE_DIR
else:
base_dir = DEFAULT_BASE_DIR
return base_dir
BASE_DIR = default_base_dir()
PHASES = ['pre-configure',
'configure',
'post-configure',
'migration']
def timeout():
p = psutil.Process()
try:
# psutils version >= 2
children = list(p.children(recursive=True))
except AttributeError:
children = list(p.get_children(recursive=True))
for child in children:
child.kill()
def exit(lock, statuscode=0):
signal.alarm(0)
if lock:
lock.truncate(0)
lock.close()
return statuscode
def main(argv=sys.argv):
parser = argparse.ArgumentParser(
description="""Runs through all of the phases to ensure
configuration is applied and enabled on a machine. Will exit with
an error if any phase has a problem. Scripts should not depend on
eachother having worked properly. Set OS_REFRESH_CONFIG_BASE_DIR
environment variable to override the default
""")
parser.add_argument('--print-base', default=False, action='store_true',
help='Print base dir and exit')
parser.add_argument('--print-phases', default=False, action='store_true',
help='Print phases (tab separated) and exit')
parser.add_argument('--log-level', default='INFO',
choices=['ERROR', 'WARN', 'CRITICAL', 'INFO', 'DEBUG'])
parser.add_argument('--lockfile',
default='/var/run/os-refresh-config.lock',
help='Lock file to prevent multiple running copies.')
parser.add_argument('--timeout',
type=int,
help='Seconds until the current run will be '
'terminated.')
options = parser.parse_args(argv[1:])
if options.print_base:
print(BASE_DIR)
return 0
if options.print_phases:
print("\t".join(PHASES))
return 0
log = logging.getLogger('os-refresh-config')
handler = logging.StreamHandler(sys.stderr)
handler.setFormatter(
logging.Formatter(
'[%(asctime)s] (%(name)s) [%(levelname)s] %(message)s'))
log.addHandler(handler)
log.setLevel(options.log_level)
# Keep open (and thus, locked) for duration of program
lock = open(options.lockfile, 'a')
try:
fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError as e:
log.error('Could not lock %s. %s' % (options.lockfile, e))
return e.errno
lock.truncate(0)
lock.write("Locked by pid==%d at %s\n" % (os.getpid(), time.localtime()))
def timeout_handler(signum, frame):
log.error('Timeout reached: %ss. Sending SIGKILL to all children' %
options.timeout)
timeout()
if options.timeout:
signal.signal(signal.SIGALRM, timeout_handler)
signal.alarm(options.timeout)
for phase in PHASES:
phase_dir = os.path.join(BASE_DIR, '%s.d' % phase)
log.debug('Checking %s' % phase_dir)
if os.path.exists(phase_dir):
args = ['dib-run-parts']
args.append(phase_dir)
try:
log.info('Starting phase %s' % phase)
log.debug('Running %s' % args)
subprocess.check_call(args, close_fds=True)
sys.stdout.flush()
sys.stderr.flush()
log.info('Completed phase %s' % phase)
except subprocess.CalledProcessError as e:
log.error("during %s phase. [%s]\n" % (phase, e))
error_dir = os.path.join(BASE_DIR, 'error.d')
if os.path.exists(error_dir):
log.info('Calling error handlers.')
try:
subprocess.call(['dib-run-parts', error_dir])
except OSError:
pass
log.error("Aborting...")
return exit(lock, 1)
else:
log.debug('No dir for phase %s' % phase)
return exit(lock)
if __name__ == '__main__':
sys.exit(main(sys.argv))
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