caa127d59a
There's three spots in the code where eventlet monkeypatches things. In one place, it was monkeypatching socket and thread; in the other two, only socket. This commit monkeypatches socket and thread everywhere. Hopefully, this lets us avoid code that, for example, works in the object server but fails in the object updater. Change-Id: Ia30d069c5ac89f4bfbe52233d03d96738144b614
278 lines
12 KiB
Python
278 lines
12 KiB
Python
# Copyright (c) 2010-2012 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import six.moves.cPickle as pickle
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import os
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import signal
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import sys
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import time
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from swift import gettext_ as _
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from random import random
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from eventlet import spawn, patcher, Timeout
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from swift.common.bufferedhttp import http_connect
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from swift.common.exceptions import ConnectionTimeout
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from swift.common.ring import Ring
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from swift.common.utils import get_logger, renamer, write_pickle, \
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dump_recon_cache, config_true_value, ismount
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from swift.common.daemon import Daemon
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from swift.common.storage_policy import split_policy_string, PolicyError
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from swift.obj.diskfile import get_tmp_dir, ASYNCDIR_BASE
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from swift.common.http import is_success, HTTP_NOT_FOUND, \
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HTTP_INTERNAL_SERVER_ERROR
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class ObjectUpdater(Daemon):
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"""Update object information in container listings."""
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def __init__(self, conf, logger=None):
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self.conf = conf
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self.logger = logger or get_logger(conf, log_route='object-updater')
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self.devices = conf.get('devices', '/srv/node')
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self.mount_check = config_true_value(conf.get('mount_check', 'true'))
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self.swift_dir = conf.get('swift_dir', '/etc/swift')
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self.interval = int(conf.get('interval', 300))
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self.container_ring = None
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self.concurrency = int(conf.get('concurrency', 1))
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self.slowdown = float(conf.get('slowdown', 0.01))
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self.node_timeout = float(conf.get('node_timeout', 10))
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self.conn_timeout = float(conf.get('conn_timeout', 0.5))
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self.successes = 0
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self.failures = 0
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self.recon_cache_path = conf.get('recon_cache_path',
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'/var/cache/swift')
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self.rcache = os.path.join(self.recon_cache_path, 'object.recon')
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def _listdir(self, path):
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try:
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return os.listdir(path)
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except OSError as e:
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self.logger.error(_('ERROR: Unable to access %(path)s: '
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'%(error)s') %
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{'path': path, 'error': e})
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return []
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def get_container_ring(self):
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"""Get the container ring. Load it, if it hasn't been yet."""
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if not self.container_ring:
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self.container_ring = Ring(self.swift_dir, ring_name='container')
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return self.container_ring
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def run_forever(self, *args, **kwargs):
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"""Run the updater continuously."""
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time.sleep(random() * self.interval)
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while True:
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self.logger.info(_('Begin object update sweep'))
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begin = time.time()
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pids = []
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# read from container ring to ensure it's fresh
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self.get_container_ring().get_nodes('')
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for device in self._listdir(self.devices):
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if self.mount_check and \
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not ismount(os.path.join(self.devices, device)):
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self.logger.increment('errors')
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self.logger.warning(
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_('Skipping %s as it is not mounted'), device)
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continue
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while len(pids) >= self.concurrency:
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pids.remove(os.wait()[0])
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pid = os.fork()
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if pid:
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pids.append(pid)
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else:
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signal.signal(signal.SIGTERM, signal.SIG_DFL)
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patcher.monkey_patch(all=False, socket=True, thread=True)
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self.successes = 0
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self.failures = 0
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forkbegin = time.time()
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self.object_sweep(os.path.join(self.devices, device))
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elapsed = time.time() - forkbegin
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self.logger.info(
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_('Object update sweep of %(device)s'
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' completed: %(elapsed).02fs, %(success)s successes'
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', %(fail)s failures'),
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{'device': device, 'elapsed': elapsed,
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'success': self.successes, 'fail': self.failures})
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sys.exit()
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while pids:
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pids.remove(os.wait()[0])
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elapsed = time.time() - begin
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self.logger.info(_('Object update sweep completed: %.02fs'),
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elapsed)
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dump_recon_cache({'object_updater_sweep': elapsed},
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self.rcache, self.logger)
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if elapsed < self.interval:
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time.sleep(self.interval - elapsed)
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def run_once(self, *args, **kwargs):
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"""Run the updater once."""
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self.logger.info(_('Begin object update single threaded sweep'))
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begin = time.time()
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self.successes = 0
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self.failures = 0
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for device in self._listdir(self.devices):
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if self.mount_check and \
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not ismount(os.path.join(self.devices, device)):
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self.logger.increment('errors')
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self.logger.warning(
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_('Skipping %s as it is not mounted'), device)
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continue
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self.object_sweep(os.path.join(self.devices, device))
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elapsed = time.time() - begin
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self.logger.info(
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_('Object update single threaded sweep completed: '
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'%(elapsed).02fs, %(success)s successes, %(fail)s failures'),
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{'elapsed': elapsed, 'success': self.successes,
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'fail': self.failures})
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dump_recon_cache({'object_updater_sweep': elapsed},
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self.rcache, self.logger)
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def object_sweep(self, device):
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"""
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If there are async pendings on the device, walk each one and update.
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:param device: path to device
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"""
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start_time = time.time()
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# loop through async pending dirs for all policies
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for asyncdir in self._listdir(device):
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# we only care about directories
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async_pending = os.path.join(device, asyncdir)
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if not os.path.isdir(async_pending):
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continue
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if not asyncdir.startswith(ASYNCDIR_BASE):
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# skip stuff like "accounts", "containers", etc.
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continue
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try:
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base, policy = split_policy_string(asyncdir)
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except PolicyError as e:
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self.logger.warning(_('Directory %r does not map '
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'to a valid policy (%s)') %
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(asyncdir, e))
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continue
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for prefix in self._listdir(async_pending):
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prefix_path = os.path.join(async_pending, prefix)
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if not os.path.isdir(prefix_path):
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continue
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last_obj_hash = None
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for update in sorted(self._listdir(prefix_path), reverse=True):
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update_path = os.path.join(prefix_path, update)
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if not os.path.isfile(update_path):
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continue
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try:
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obj_hash, timestamp = update.split('-')
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except ValueError:
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self.logger.increment('errors')
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self.logger.error(
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_('ERROR async pending file with unexpected '
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'name %s')
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% (update_path))
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continue
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if obj_hash == last_obj_hash:
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self.logger.increment("unlinks")
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os.unlink(update_path)
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else:
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self.process_object_update(update_path, device,
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policy)
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last_obj_hash = obj_hash
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time.sleep(self.slowdown)
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try:
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os.rmdir(prefix_path)
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except OSError:
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pass
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self.logger.timing_since('timing', start_time)
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def process_object_update(self, update_path, device, policy):
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"""
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Process the object information to be updated and update.
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:param update_path: path to pickled object update file
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:param device: path to device
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:param policy: storage policy of object update
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"""
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try:
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update = pickle.load(open(update_path, 'rb'))
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except Exception:
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self.logger.exception(
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_('ERROR Pickle problem, quarantining %s'), update_path)
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self.logger.increment('quarantines')
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target_path = os.path.join(device, 'quarantined', 'objects',
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os.path.basename(update_path))
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renamer(update_path, target_path, fsync=False)
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return
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successes = update.get('successes', [])
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part, nodes = self.get_container_ring().get_nodes(
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update['account'], update['container'])
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obj = '/%s/%s/%s' % \
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(update['account'], update['container'], update['obj'])
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headers_out = update['headers'].copy()
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headers_out['user-agent'] = 'object-updater %s' % os.getpid()
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headers_out.setdefault('X-Backend-Storage-Policy-Index',
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str(int(policy)))
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events = [spawn(self.object_update,
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node, part, update['op'], obj, headers_out)
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for node in nodes if node['id'] not in successes]
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success = True
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new_successes = False
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for event in events:
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event_success, node_id = event.wait()
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if event_success is True:
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successes.append(node_id)
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new_successes = True
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else:
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success = False
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if success:
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self.successes += 1
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self.logger.increment('successes')
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self.logger.debug('Update sent for %(obj)s %(path)s',
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{'obj': obj, 'path': update_path})
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self.logger.increment("unlinks")
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os.unlink(update_path)
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else:
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self.failures += 1
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self.logger.increment('failures')
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self.logger.debug('Update failed for %(obj)s %(path)s',
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{'obj': obj, 'path': update_path})
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if new_successes:
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update['successes'] = successes
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write_pickle(update, update_path, os.path.join(
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device, get_tmp_dir(policy)))
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def object_update(self, node, part, op, obj, headers_out):
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"""
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Perform the object update to the container
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:param node: node dictionary from the container ring
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:param part: partition that holds the container
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:param op: operation performed (ex: 'PUT' or 'DELETE')
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:param obj: object name being updated
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:param headers_out: headers to send with the update
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"""
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try:
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with ConnectionTimeout(self.conn_timeout):
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conn = http_connect(node['ip'], node['port'], node['device'],
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part, op, obj, headers_out)
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with Timeout(self.node_timeout):
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resp = conn.getresponse()
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resp.read()
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success = (is_success(resp.status) or
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resp.status == HTTP_NOT_FOUND)
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return (success, node['id'])
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except (Exception, Timeout):
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self.logger.exception(_('ERROR with remote server '
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'%(ip)s:%(port)s/%(device)s'), node)
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return HTTP_INTERNAL_SERVER_ERROR, node['id']
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