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1e9a238f35
Read the FINAL lines from the Apache error log, optionally from a start time, and calculate the total cache hits and misses and calculate the average read savings. https://pagure.io/freeipa/issue/8798 Signed-off-by: Rob Crittenden <rcritten@redhat.com> Reviewed-By: Rafael Guterres Jeffman <rjeffman@redhat.com>
119 lines
3.5 KiB
Python
119 lines
3.5 KiB
Python
#!/usr/bin/python3
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#
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# Copyright (C) 2021 FreeIPA Contributors see COPYING for license
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from __future__ import division
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from datetime import datetime
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import logging
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import re
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from ipapython import admintool
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from ipalib.facts import is_ipa_configured
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# r'(?P<command>\S+)/1\(.*\): (?P<result>\S+) etime=(?P<etime>\d+)'
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TIME_RE = re.compile(
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r'\[(?P<date>.*)\] \[.*\].* \[pid \d+:tid \d+\] \[remote .*\] '
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r'ipa: DEBUG: FINAL: Hits (?P<hits>\d+) Misses (?P<misses>\d+) '
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r'Size (?P<size>\d+)'
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)
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DATE_FORMAT = '%a %b %d %H:%M:%S.%f %Y'
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logger = logging.getLogger(__name__)
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class cachelog(admintool.AdminTool):
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command_name = "cachelog"
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usage = "%prog [options]"
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description = "Parse the Apache error log for cache performance data. " \
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"Enable debugging by creating /etc/ipa/server.conf with " \
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"the contents: [global]\\ndebug = True"
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def __init__(self, options, args):
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super(cachelog, self).__init__(options, args)
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self.since = None
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@classmethod
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def add_options(cls, parser):
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super(cachelog, cls).add_options(parser, debug_option=True)
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parser.add_option(
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"--command",
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dest="command",
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action="store",
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default=None,
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help="Command to analyze",
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)
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parser.add_option(
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"--start-time",
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dest="start_time",
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action="store",
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default=None,
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help="time to begin analyzing logfile from, e.g. "
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"Fri May 7 16:33:08.0 2021",
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)
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parser.add_option(
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"--file",
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dest="file",
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action="store",
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default="/var/log/httpd/error_log",
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help="Log file to parse",
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)
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def validate_options(self):
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super(cachelog, self).validate_options(needs_root=True)
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if self.options.start_time:
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self.since = datetime.strptime(
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self.options.start_time,
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DATE_FORMAT
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)
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def run(self):
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super(cachelog, self).run()
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if not is_ipa_configured():
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logger.error("IPA server is not configured on this system.")
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raise admintool.ScriptError()
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with open(self.options.file, 'r') as f:
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data = f.read()
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matches = list(re.finditer(TIME_RE, data))
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hits = 0
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misses = 0
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count = 0
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for match in matches:
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if self.since:
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logtime = datetime.strptime(match.group('date'), DATE_FORMAT)
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if logtime < self.since:
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continue
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hits += int(match.group('hits'))
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misses += int(match.group('misses'))
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count += 1
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print('Total reads %d, hits %d, misses %d, avg %1.4f' %
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(hits + misses, hits, misses, hits / (hits + misses)))
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if __name__ == '__main__':
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cachelog.run_cli()
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