280 lines
12 KiB
Python
280 lines
12 KiB
Python
# Copyright (c) 2010-2012 OpenStack, LLC.
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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 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, patcher, Timeout
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import swift.common.db
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from swift.container.server import DATADIR
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from swift.common.bufferedhttp import http_connect
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from swift.common.db import ContainerBroker
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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, TRUE_VALUES
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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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class ContainerUpdater(Daemon):
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"""Update container information in account listings."""
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def __init__(self, conf):
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self.conf = conf
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self.logger = 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 = conf.get('mount_check', 'true').lower() in \
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('true', 't', '1', 'on', 'yes', 'y')
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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.account_ring = None
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self.concurrency = int(conf.get('concurrency', 4))
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self.slowdown = float(conf.get('slowdown', 0.01))
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self.node_timeout = int(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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conf.get('db_preallocation', 't').lower() in TRUE_VALUES
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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 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 os.listdir(self.devices):
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dev_path = os.path.join(self.devices, device)
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if self.mount_check and not os.path.ismount(dev_path):
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self.logger.warn(_('%s is not mounted'), device)
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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 os.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 updator 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.iteritems() 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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patcher.monkey_patch(all=False, socket=True)
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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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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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patcher.monkey_patch(all=False, socket=True)
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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(_('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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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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self.process_container(os.path.join(root, file))
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time.sleep(self.slowdown)
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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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broker = ContainerBroker(dbfile, logger=self.logger)
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info = broker.get_info()
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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 float(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 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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for node in nodes]
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successes = 0
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failures = 0
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for event in events:
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if is_success(event.wait()):
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successes += 1
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else:
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failures += 1
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if successes > failures:
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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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else:
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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 >>self.new_account_suppressions, \
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info['account'], until
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else:
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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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"""
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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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"""
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with ConnectionTimeout(self.conn_timeout):
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try:
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conn = http_connect(
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node['ip'], node['port'], node['device'], part,
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'PUT', container,
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headers={'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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except (Exception, Timeout):
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self.logger.exception(_('ERROR account update failed with '
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'%(ip)s:%(port)s/%(device)s (will retry later): '), node)
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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 %(ip)s:%(port)s/%(device)s'), node)
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return HTTP_INTERNAL_SERVER_ERROR
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