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# Copyright (c) 2010-2018 OpenStack Foundation
#
# 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 os
import time
from random import random
from eventlet import Timeout
import swift.common.db
from swift.common.utils import get_logger, audit_location_generator, \
config_true_value, dump_recon_cache, EventletRateLimiter
from swift.common.daemon import Daemon
from swift.common.exceptions import DatabaseAuditorException
from swift.common.recon import DEFAULT_RECON_CACHE_PATH, \
server_type_to_recon_file
class DatabaseAuditor(Daemon):
"""Base Database Auditor."""
@property
def rcache(self):
return os.path.join(
self.recon_cache_path,
server_type_to_recon_file(self.server_type))
@property
def server_type(self):
raise NotImplementedError
@property
def broker_class(self):
raise NotImplementedError
def __init__(self, conf, logger=None):
self.conf = conf
self.logger = logger or get_logger(conf, log_route='{}-auditor'.format(
self.server_type))
self.devices = conf.get('devices', '/srv/node')
self.mount_check = config_true_value(conf.get('mount_check', 'true'))
self.interval = float(conf.get('interval', 1800))
self.logging_interval = 3600 # once an hour
self.passes = 0
self.failures = 0
self.max_dbs_per_second = \
float(conf.get('{}s_per_second'.format(self.server_type), 200))
self.rate_limiter = EventletRateLimiter(self.max_dbs_per_second)
swift.common.db.DB_PREALLOCATION = \
config_true_value(conf.get('db_preallocation', 'f'))
self.recon_cache_path = conf.get('recon_cache_path',
DEFAULT_RECON_CACHE_PATH)
self.datadir = '{}s'.format(self.server_type)
def _one_audit_pass(self, reported):
all_locs = audit_location_generator(self.devices, self.datadir, '.db',
mount_check=self.mount_check,
logger=self.logger)
for path, device, partition in all_locs:
self.audit(path)
if time.time() - reported >= self.logging_interval:
self.logger.info(
'Since %(time)s: %(server_type)s audits: %(pass)s '
'passed audit, %(fail)s failed audit',
{'time': time.ctime(reported),
'pass': self.passes,
'fail': self.failures,
'server_type': self.server_type})
dump_recon_cache(
{'{}_audits_since'.format(self.server_type): reported,
'{}_audits_passed'.format(self.server_type): self.passes,
'{}_audits_failed'.format(self.server_type):
self.failures},
self.rcache, self.logger)
reported = time.time()
self.passes = 0
self.failures = 0
self.rate_limiter.wait()
return reported
def run_forever(self, *args, **kwargs):
"""Run the database audit until stopped."""
reported = time.time()
time.sleep(random() * self.interval)
while True:
self.logger.info(
'Begin {} audit pass.'.format(self.server_type))
begin = time.time()
try:
reported = self._one_audit_pass(reported)
except (Exception, Timeout):
self.logger.increment('errors')
self.logger.exception('ERROR auditing')
elapsed = time.time() - begin
self.logger.info(
'%(server_type)s audit pass completed: %(elapsed).02fs',
{'elapsed': elapsed, 'server_type': self.server_type.title()})
dump_recon_cache({
'{}_auditor_pass_completed'.format(self.server_type): elapsed},
self.rcache, self.logger)
if elapsed < self.interval:
time.sleep(self.interval - elapsed)
def run_once(self, *args, **kwargs):
"""Run the database audit once."""
self.logger.info(
'Begin {} audit "once" mode'.format(self.server_type))
begin = reported = time.time()
self._one_audit_pass(reported)
elapsed = time.time() - begin
self.logger.info(
'%(server_type)s audit "once" mode completed: %(elapsed).02fs',
{'elapsed': elapsed, 'server_type': self.server_type.title()})
dump_recon_cache(
{'{}_auditor_pass_completed'.format(self.server_type): elapsed},
self.rcache, self.logger)
def audit(self, path):
"""
Audits the given database path
:param path: the path to a db
"""
start_time = time.time()
try:
broker = self.broker_class(path, logger=self.logger)
if not broker.is_deleted():
info = broker.get_info()
err = self._audit(info, broker)
if err:
raise err
self.logger.increment('passes')
self.passes += 1
self.logger.debug('Audit passed for %s', broker)
except DatabaseAuditorException as e:
self.logger.increment('failures')
self.failures += 1
self.logger.error('Audit Failed for %(path)s: %(err)s',
{'path': path, 'err': str(e)})
except (Exception, Timeout):
self.logger.increment('failures')
self.failures += 1
self.logger.exception(
'ERROR Could not get %(server_type)s info %(path)s',
{'server_type': self.server_type, 'path': path})
self.logger.timing_since('timing', start_time)
def _audit(self, info, broker):
"""
Run any additional audit checks in sub auditor classes
:param info: The DB <account/container>_info
:param broker: The broker
:return: None on success, otherwise an exception to throw.
"""
raise NotImplementedError
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