360 lines
15 KiB
Python
360 lines
15 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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from __future__ import print_function
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import logging
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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 random import random, shuffle
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from tempfile import mkstemp
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from eventlet import spawn, Timeout
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import swift.common.db
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from swift.common.constraints import check_drive
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from swift.container.backend import ContainerBroker, DATADIR
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from swift.common.bufferedhttp import http_connect
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from swift.common.exceptions import ConnectionTimeout, LockTimeout
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from swift.common.ring import Ring
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from swift.common.utils import get_logger, config_true_value, \
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dump_recon_cache, majority_size, Timestamp, EventletRateLimiter, \
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eventlet_monkey_patch, node_to_string
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from swift.common.daemon import Daemon
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from swift.common.http import is_success, HTTP_INTERNAL_SERVER_ERROR
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from swift.common.recon import RECON_CONTAINER_FILE, DEFAULT_RECON_CACHE_PATH
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class ContainerUpdater(Daemon):
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"""Update container information in account 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='container-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 = float(conf.get('interval', 300))
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self.account_ring = None
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self.concurrency = int(conf.get('concurrency', 4))
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if 'slowdown' in conf:
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self.logger.warning(
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'The slowdown option is deprecated in favor of '
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'containers_per_second. This option may be ignored in a '
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'future release.')
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containers_per_second = 1 / (
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float(conf.get('slowdown', '0.01')) + 0.01)
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else:
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containers_per_second = 50
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self.max_containers_per_second = \
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float(conf.get('containers_per_second',
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containers_per_second))
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self.rate_limiter = EventletRateLimiter(self.max_containers_per_second)
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self.node_timeout = float(conf.get('node_timeout', 3))
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self.conn_timeout = float(conf.get('conn_timeout', 0.5))
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self.no_changes = 0
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self.successes = 0
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self.failures = 0
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self.account_suppressions = {}
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self.account_suppression_time = \
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float(conf.get('account_suppression_time', 60))
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self.new_account_suppressions = None
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swift.common.db.DB_PREALLOCATION = \
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config_true_value(conf.get('db_preallocation', 'f'))
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self.recon_cache_path = conf.get('recon_cache_path',
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DEFAULT_RECON_CACHE_PATH)
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self.rcache = os.path.join(self.recon_cache_path, RECON_CONTAINER_FILE)
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self.user_agent = 'container-updater %s' % os.getpid()
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def get_account_ring(self):
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"""Get the account ring. Load it if it hasn't been yet."""
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if not self.account_ring:
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self.account_ring = Ring(self.swift_dir, ring_name='account')
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return self.account_ring
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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: Failed to get paths to drive '
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'partitions: %s', e)
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return []
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def get_paths(self):
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"""
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Get paths to all of the partitions on each drive to be processed.
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:returns: a list of paths
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"""
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paths = []
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for device in self._listdir(self.devices):
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try:
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dev_path = check_drive(self.devices, device, self.mount_check)
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except ValueError as err:
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self.logger.warning("%s", err)
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continue
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con_path = os.path.join(dev_path, DATADIR)
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if not os.path.exists(con_path):
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continue
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for partition in self._listdir(con_path):
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paths.append(os.path.join(con_path, partition))
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shuffle(paths)
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return paths
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def _load_suppressions(self, filename):
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try:
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with open(filename, 'r') as tmpfile:
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for line in tmpfile:
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account, until = line.split()
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until = float(until)
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self.account_suppressions[account] = until
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except Exception:
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self.logger.exception(
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'ERROR with loading suppressions from %s: ', filename)
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finally:
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os.unlink(filename)
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def run_forever(self, *args, **kwargs):
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"""
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Run the updater continuously.
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"""
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time.sleep(random() * self.interval)
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while True:
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self.logger.info('Begin container update sweep')
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begin = time.time()
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now = time.time()
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expired_suppressions = \
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[a for a, u in self.account_suppressions.items()
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if u < now]
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for account in expired_suppressions:
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del self.account_suppressions[account]
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pid2filename = {}
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# read from account ring to ensure it's fresh
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self.get_account_ring().get_nodes('')
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for path in self.get_paths():
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while len(pid2filename) >= self.concurrency:
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pid = os.wait()[0]
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try:
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self._load_suppressions(pid2filename[pid])
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finally:
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del pid2filename[pid]
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fd, tmpfilename = mkstemp()
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os.close(fd)
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pid = os.fork()
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if pid:
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pid2filename[pid] = tmpfilename
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else:
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signal.signal(signal.SIGTERM, signal.SIG_DFL)
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os.environ.pop('NOTIFY_SOCKET', None)
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eventlet_monkey_patch()
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self.no_changes = 0
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self.successes = 0
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self.failures = 0
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self.new_account_suppressions = open(tmpfilename, 'w')
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forkbegin = time.time()
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self.container_sweep(path)
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elapsed = time.time() - forkbegin
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self.logger.debug(
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'Container update sweep of %(path)s completed: '
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'%(elapsed).02fs, %(success)s successes, %(fail)s '
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'failures, %(no_change)s with no changes',
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{'path': path, 'elapsed': elapsed,
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'success': self.successes, 'fail': self.failures,
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'no_change': self.no_changes})
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sys.exit()
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while pid2filename:
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pid = os.wait()[0]
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try:
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self._load_suppressions(pid2filename[pid])
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finally:
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del pid2filename[pid]
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elapsed = time.time() - begin
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self.logger.info('Container update sweep completed: %.02fs',
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elapsed)
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dump_recon_cache({'container_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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"""
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Run the updater once.
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"""
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eventlet_monkey_patch()
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self.logger.info('Begin container update single threaded sweep')
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begin = time.time()
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self.no_changes = 0
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self.successes = 0
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self.failures = 0
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for path in self.get_paths():
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self.container_sweep(path)
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elapsed = time.time() - begin
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self.logger.info(
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'Container update single threaded sweep completed: '
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'%(elapsed).02fs, %(success)s successes, %(fail)s failures, '
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'%(no_change)s with no changes',
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{'elapsed': elapsed, 'success': self.successes,
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'fail': self.failures, 'no_change': self.no_changes})
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dump_recon_cache({'container_updater_sweep': elapsed},
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self.rcache, self.logger)
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def container_sweep(self, path):
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"""
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Walk the path looking for container DBs and process them.
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:param path: path to walk
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"""
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for root, dirs, files in os.walk(path):
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for file in files:
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if file.endswith('.db'):
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dbfile = os.path.join(root, file)
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try:
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self.process_container(dbfile)
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except (Exception, Timeout) as e:
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self.logger.exception(
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"Error processing container %s: %s", dbfile, e)
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self.rate_limiter.wait()
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def process_container(self, dbfile):
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"""
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Process a container, and update the information in the account.
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:param dbfile: container DB to process
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"""
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start_time = time.time()
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broker = ContainerBroker(dbfile, logger=self.logger)
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try:
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info = broker.get_info()
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except LockTimeout as e:
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self.logger.info(
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"Failed to get container info (Lock timeout: %s); skipping.",
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str(e))
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return
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# Don't send updates if the container was auto-created since it
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# definitely doesn't have up to date statistics.
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if Timestamp(info['put_timestamp']) <= 0:
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return
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if self.account_suppressions.get(info['account'], 0) > time.time():
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return
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if not broker.is_root_container():
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# Don't double-up account stats.
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# The sharder should get these stats to the root container,
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# and the root's updater will get them to the right account.
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info['object_count'] = info['bytes_used'] = 0
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if info['put_timestamp'] > info['reported_put_timestamp'] or \
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info['delete_timestamp'] > info['reported_delete_timestamp'] \
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or info['object_count'] != info['reported_object_count'] or \
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info['bytes_used'] != info['reported_bytes_used']:
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container = '/%s/%s' % (info['account'], info['container'])
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part, nodes = self.get_account_ring().get_nodes(info['account'])
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events = [spawn(self.container_report, node, part, container,
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info['put_timestamp'], info['delete_timestamp'],
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info['object_count'], info['bytes_used'],
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info['storage_policy_index'])
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for node in nodes]
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successes = 0
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stub404s = 0
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for event in events:
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result = event.wait()
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if is_success(result):
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successes += 1
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if result == 404:
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stub404s += 1
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if successes >= majority_size(len(events)):
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self.logger.increment('successes')
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self.successes += 1
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self.logger.debug(
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'Update report sent for %(container)s %(dbfile)s',
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{'container': container, 'dbfile': dbfile})
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broker.reported(info['put_timestamp'],
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info['delete_timestamp'], info['object_count'],
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info['bytes_used'])
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elif stub404s == len(events):
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self.logger.increment('failures')
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self.failures += 1
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self.logger.debug(
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'Update report stub for %(container)s %(dbfile)s',
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{'container': container, 'dbfile': dbfile})
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broker.quarantine('no account replicas exist')
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# All that's left at this point is a few sacks of Gnocchi,
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# easily collected by the dark data watcher in object auditor.
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else:
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self.logger.increment('failures')
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self.failures += 1
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self.logger.debug(
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'Update report failed for %(container)s %(dbfile)s',
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{'container': container, 'dbfile': dbfile})
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self.account_suppressions[info['account']] = until = \
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time.time() + self.account_suppression_time
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if self.new_account_suppressions:
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print(info['account'], until,
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file=self.new_account_suppressions)
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# Only track timing data for attempted updates:
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self.logger.timing_since('timing', start_time)
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else:
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self.logger.increment('no_changes')
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self.no_changes += 1
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def container_report(self, node, part, container, put_timestamp,
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delete_timestamp, count, bytes,
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storage_policy_index):
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"""
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Report container info to an account server.
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:param node: node dictionary from the account ring
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:param part: partition the account is on
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:param container: container name
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:param put_timestamp: put timestamp
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:param delete_timestamp: delete timestamp
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:param count: object count in the container
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:param bytes: bytes used in the container
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:param storage_policy_index: the policy index for the container
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"""
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with ConnectionTimeout(self.conn_timeout):
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try:
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headers = {
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'X-Put-Timestamp': put_timestamp,
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'X-Delete-Timestamp': delete_timestamp,
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'X-Object-Count': count,
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'X-Bytes-Used': bytes,
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'X-Account-Override-Deleted': 'yes',
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'X-Backend-Storage-Policy-Index': storage_policy_index,
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'user-agent': self.user_agent}
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conn = http_connect(
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node['replication_ip'], node['replication_port'],
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node['device'], part, 'PUT', container, headers=headers)
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except (Exception, Timeout):
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self.logger.exception(
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'ERROR account update failed with %s (will retry later):',
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node_to_string(node, replication=True))
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return HTTP_INTERNAL_SERVER_ERROR
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with Timeout(self.node_timeout):
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try:
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resp = conn.getresponse()
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resp.read()
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return resp.status
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except (Exception, Timeout):
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if self.logger.getEffectiveLevel() <= logging.DEBUG:
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self.logger.exception(
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'Exception with %s',
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node_to_string(node, replication=True))
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return HTTP_INTERNAL_SERVER_ERROR
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finally:
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conn.close()
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