86 lines
2.6 KiB
Python
86 lines
2.6 KiB
Python
# 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 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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#
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# This file was forked from dstat's mysql5_innodb plugin but retains none of
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# that original code other than a list of well known MySQL variable names.
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''' MySQL is accessed via the configuration options found at ~/.my.cnf. This is
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parsed not by libmysqlclient, which may or may not be present, but by
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configparser. As such, some options that are usually usable from that file may
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be ignored by this module. Everything from the "client" section will be passed
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through to pymysql's connect method.
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'''
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import configparser
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import logging
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import os
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import pymysql
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from os_performance_tools import error
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COLLECT_COUNTERS = (
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'Com_delete',
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'Com_insert',
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'Com_select',
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'Com_update',
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'Connections',
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'Innodb_buffer_pool_read_requests',
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'Innodb_data_reads',
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'Innodb_data_read',
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'Innodb_data_writes',
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'Innodb_data_written',
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'Innodb_log_writes',
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'Innodb_rows_deleted',
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'Innodb_rows_inserted',
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'Innodb_rows_read',
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'Innodb_rows_updated',
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'Queries',
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'Slow_queries',
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)
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'''These counters' meaning are all documented in the `MySQL manual
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<http://dev.mysql.com/doc/refman/5.6/en/server-status-variables.html>`_.
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They are intended to show a picture of how much has been asked of
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MySQL, and how busy MySQL was while executing commands. Each one will
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be recorded unaltered by name in the resulting counters mapping.
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'''
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def _get_config():
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args = {}
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try:
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with open(os.path.expanduser("~/.my.cnf")) as dfile:
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parser = configparser.ConfigParser()
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parser.read_file(dfile)
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for k, v in parser.items('client'):
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args[k] = v
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except IOError as e:
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raise error.CollectionError(str(e))
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return args
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def collect():
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log = logging.getLogger()
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args = _get_config()
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conn = pymysql.connect(**args)
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cursor = conn.cursor()
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counters = {}
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cursor.execute('show global status')
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while True:
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result = cursor.fetchone()
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if result is None:
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break
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k, v = result
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if k in COLLECT_COUNTERS:
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counters[k] = int(v)
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log.debug(counters)
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return counters
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