/usr/lib/python2.7/dist-packages/swift/container/updater.py is in python-swift 2.7.0-0ubuntu2.
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#
# 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.
from __future__ import print_function
import logging
import os
import signal
import sys
import time
from swift import gettext_ as _
from random import random, shuffle
from tempfile import mkstemp
from eventlet import spawn, patcher, Timeout
import swift.common.db
from swift.container.backend import ContainerBroker, DATADIR
from swift.common.bufferedhttp import http_connect
from swift.common.exceptions import ConnectionTimeout
from swift.common.ring import Ring
from swift.common.utils import get_logger, config_true_value, ismount, \
dump_recon_cache, quorum_size, Timestamp
from swift.common.daemon import Daemon
from swift.common.http import is_success, HTTP_INTERNAL_SERVER_ERROR
class ContainerUpdater(Daemon):
"""Update container information in account listings."""
def __init__(self, conf):
self.conf = conf
self.logger = get_logger(conf, log_route='container-updater')
self.devices = conf.get('devices', '/srv/node')
self.mount_check = config_true_value(conf.get('mount_check', 'true'))
self.swift_dir = conf.get('swift_dir', '/etc/swift')
self.interval = int(conf.get('interval', 300))
self.account_ring = None
self.concurrency = int(conf.get('concurrency', 4))
self.slowdown = float(conf.get('slowdown', 0.01))
self.node_timeout = float(conf.get('node_timeout', 3))
self.conn_timeout = float(conf.get('conn_timeout', 0.5))
self.no_changes = 0
self.successes = 0
self.failures = 0
self.account_suppressions = {}
self.account_suppression_time = \
float(conf.get('account_suppression_time', 60))
self.new_account_suppressions = None
swift.common.db.DB_PREALLOCATION = \
config_true_value(conf.get('db_preallocation', 'f'))
self.recon_cache_path = conf.get('recon_cache_path',
'/var/cache/swift')
self.rcache = os.path.join(self.recon_cache_path, "container.recon")
self.user_agent = 'container-updater %s' % os.getpid()
def get_account_ring(self):
"""Get the account ring. Load it if it hasn't been yet."""
if not self.account_ring:
self.account_ring = Ring(self.swift_dir, ring_name='account')
return self.account_ring
def _listdir(self, path):
try:
return os.listdir(path)
except OSError as e:
self.logger.error(_('ERROR: Failed to get paths to drive '
'partitions: %s') % e)
return []
def get_paths(self):
"""
Get paths to all of the partitions on each drive to be processed.
:returns: a list of paths
"""
paths = []
for device in self._listdir(self.devices):
dev_path = os.path.join(self.devices, device)
if self.mount_check and not ismount(dev_path):
self.logger.warning(_('%s is not mounted'), device)
continue
con_path = os.path.join(dev_path, DATADIR)
if not os.path.exists(con_path):
continue
for partition in self._listdir(con_path):
paths.append(os.path.join(con_path, partition))
shuffle(paths)
return paths
def _load_suppressions(self, filename):
try:
with open(filename, 'r') as tmpfile:
for line in tmpfile:
account, until = line.split()
until = float(until)
self.account_suppressions[account] = until
except Exception:
self.logger.exception(
_('ERROR with loading suppressions from %s: ') % filename)
finally:
os.unlink(filename)
def run_forever(self, *args, **kwargs):
"""
Run the updator continuously.
"""
time.sleep(random() * self.interval)
while True:
self.logger.info(_('Begin container update sweep'))
begin = time.time()
now = time.time()
expired_suppressions = \
[a for a, u in self.account_suppressions.items()
if u < now]
for account in expired_suppressions:
del self.account_suppressions[account]
pid2filename = {}
# read from account ring to ensure it's fresh
self.get_account_ring().get_nodes('')
for path in self.get_paths():
while len(pid2filename) >= self.concurrency:
pid = os.wait()[0]
try:
self._load_suppressions(pid2filename[pid])
finally:
del pid2filename[pid]
fd, tmpfilename = mkstemp()
os.close(fd)
pid = os.fork()
if pid:
pid2filename[pid] = tmpfilename
else:
signal.signal(signal.SIGTERM, signal.SIG_DFL)
patcher.monkey_patch(all=False, socket=True, thread=True)
self.no_changes = 0
self.successes = 0
self.failures = 0
self.new_account_suppressions = open(tmpfilename, 'w')
forkbegin = time.time()
self.container_sweep(path)
elapsed = time.time() - forkbegin
self.logger.debug(
_('Container update sweep of %(path)s completed: '
'%(elapsed).02fs, %(success)s successes, %(fail)s '
'failures, %(no_change)s with no changes'),
{'path': path, 'elapsed': elapsed,
'success': self.successes, 'fail': self.failures,
'no_change': self.no_changes})
sys.exit()
while pid2filename:
pid = os.wait()[0]
try:
self._load_suppressions(pid2filename[pid])
finally:
del pid2filename[pid]
elapsed = time.time() - begin
self.logger.info(_('Container update sweep completed: %.02fs'),
elapsed)
dump_recon_cache({'container_updater_sweep': elapsed},
self.rcache, self.logger)
if elapsed < self.interval:
time.sleep(self.interval - elapsed)
def run_once(self, *args, **kwargs):
"""
Run the updater once.
"""
patcher.monkey_patch(all=False, socket=True, thread=True)
self.logger.info(_('Begin container update single threaded sweep'))
begin = time.time()
self.no_changes = 0
self.successes = 0
self.failures = 0
for path in self.get_paths():
self.container_sweep(path)
elapsed = time.time() - begin
self.logger.info(_(
'Container update single threaded sweep completed: '
'%(elapsed).02fs, %(success)s successes, %(fail)s failures, '
'%(no_change)s with no changes'),
{'elapsed': elapsed, 'success': self.successes,
'fail': self.failures, 'no_change': self.no_changes})
dump_recon_cache({'container_updater_sweep': elapsed},
self.rcache, self.logger)
def container_sweep(self, path):
"""
Walk the path looking for container DBs and process them.
:param path: path to walk
"""
for root, dirs, files in os.walk(path):
for file in files:
if file.endswith('.db'):
self.process_container(os.path.join(root, file))
time.sleep(self.slowdown)
def process_container(self, dbfile):
"""
Process a container, and update the information in the account.
:param dbfile: container DB to process
"""
start_time = time.time()
broker = ContainerBroker(dbfile, logger=self.logger)
info = broker.get_info()
# Don't send updates if the container was auto-created since it
# definitely doesn't have up to date statistics.
if Timestamp(info['put_timestamp']) <= 0:
return
if self.account_suppressions.get(info['account'], 0) > time.time():
return
if info['put_timestamp'] > info['reported_put_timestamp'] or \
info['delete_timestamp'] > info['reported_delete_timestamp'] \
or info['object_count'] != info['reported_object_count'] or \
info['bytes_used'] != info['reported_bytes_used']:
container = '/%s/%s' % (info['account'], info['container'])
part, nodes = self.get_account_ring().get_nodes(info['account'])
events = [spawn(self.container_report, node, part, container,
info['put_timestamp'], info['delete_timestamp'],
info['object_count'], info['bytes_used'],
info['storage_policy_index'])
for node in nodes]
successes = 0
for event in events:
if is_success(event.wait()):
successes += 1
if successes >= quorum_size(len(events)):
self.logger.increment('successes')
self.successes += 1
self.logger.debug(
_('Update report sent for %(container)s %(dbfile)s'),
{'container': container, 'dbfile': dbfile})
broker.reported(info['put_timestamp'],
info['delete_timestamp'], info['object_count'],
info['bytes_used'])
else:
self.logger.increment('failures')
self.failures += 1
self.logger.debug(
_('Update report failed for %(container)s %(dbfile)s'),
{'container': container, 'dbfile': dbfile})
self.account_suppressions[info['account']] = until = \
time.time() + self.account_suppression_time
if self.new_account_suppressions:
print(info['account'], until,
file=self.new_account_suppressions)
# Only track timing data for attempted updates:
self.logger.timing_since('timing', start_time)
else:
self.logger.increment('no_changes')
self.no_changes += 1
def container_report(self, node, part, container, put_timestamp,
delete_timestamp, count, bytes,
storage_policy_index):
"""
Report container info to an account server.
:param node: node dictionary from the account ring
:param part: partition the account is on
:param container: container name
:param put_timestamp: put timestamp
:param delete_timestamp: delete timestamp
:param count: object count in the container
:param bytes: bytes used in the container
:param storage_policy_index: the policy index for the container
"""
with ConnectionTimeout(self.conn_timeout):
try:
headers = {
'X-Put-Timestamp': put_timestamp,
'X-Delete-Timestamp': delete_timestamp,
'X-Object-Count': count,
'X-Bytes-Used': bytes,
'X-Account-Override-Deleted': 'yes',
'X-Backend-Storage-Policy-Index': storage_policy_index,
'user-agent': self.user_agent}
conn = http_connect(
node['ip'], node['port'], node['device'], part,
'PUT', container, headers=headers)
except (Exception, Timeout):
self.logger.exception(_(
'ERROR account update failed with '
'%(ip)s:%(port)s/%(device)s (will retry later): '), node)
return HTTP_INTERNAL_SERVER_ERROR
with Timeout(self.node_timeout):
try:
resp = conn.getresponse()
resp.read()
return resp.status
except (Exception, Timeout):
if self.logger.getEffectiveLevel() <= logging.DEBUG:
self.logger.exception(
_('Exception with %(ip)s:%(port)s/%(device)s'), node)
return HTTP_INTERNAL_SERVER_ERROR
finally:
conn.close()
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