mysql主从日志的定期清理
mysql主从的binlog定时删除是很重要的，一般是通过expire_logs_days = 10来设置binlog保留的天数（mysql5.0一下版本不支持），但有时这还不够，假如有几天的日志量非常大，硬盘可能会满，所以不但要设置保留的天数，还要监控硬盘的空间使用情况。写了一个脚本，适合各个版本的mysql，保留3天的日志，当存放日志的硬盘使用率超过80%，则保留2天，但至少会保留一天的binlog日志文件。[*]#!/bin/env python
[*]# -*- coding: utf-8 -*-
[*]##############################################################
[*]#查看存在binlog的目录位置并找出3天前的最后一个bin-log文件名字
[*]#删除3天以前的binlog文件，删除之后data1目录挂载的硬盘使用率超
[*]#过的80%的话，继续删除2天前的日志文件，至少保留一天的日志。
[*]##############################################################
[*]
[*]import os,sys,time,MySQLdb
[*]
[*]def log_w(text):
[*] logfile = "/usr/local/zabbix/bin/delet.log"
[*] now = time.strftime("%Y-%m-%d %H:%M:%S")
[*] tt = now + "\t" + str(text) + "\n"
[*] f = open(logfile,'a+')
[*] f.write(tt)
[*] f.close()
[*]
[*]def mysql_conn(port,lastlog,days):
[*] try:
[*] center_ip = '127.0.0.1'
[*] center_user = 'repl_monitor'
[*] center_passwd = 'VQMQLGwTaw3k0UV8'
[*] sql = "PURGE MASTER LOGS TO '%s';" % lastlog
[*] conn = MySQLdb.connect(host = center_ip,port = int(port),user = center_user,passwd = center_passwd,connect_timeout=5)
[*] cursor = conn.cursor()
[*] cursor.execute(sql)
[*] alldata = cursor.fetchall()
[*] cursor.close()
[*] conn.close()
[*] text = "Deltet before %s days binlog,deltet %s before !" % (days,lastlog)
[*] log_w(text)
[*] except Exception,e:
[*] log_w(e)
[*]
[*]def find_logdir():
[*] conn = "find / -name binlog|grep -v usr"
[*] logdir_list = os.popen(conn).readlines()
[*] if len(logdir_list) != 0:
[*] for logdir in logdir_list:
[*] datadir = logdir.strip().split("/")
[*] if "mysql_log" in logdir.strip():
[*] port = 3306
[*] else:
[*] port = logdir.strip().split("/").split("-")[-1]
[*] days = 3
[*] while 1:
[*] conn = "find %s -mtime %s|sort" % (logdir.strip(),days)
[*] count = os.popen(conn).readlines()
[*] if len(count) != 0:
[*] lastlog = count[-1].strip().split("/")[-1]
[*] mysql_conn(port,lastlog,days)
[*]
[*] df = "df -h|grep -e '%s$'|awk '{print $5}'|awk -F '%%' '{print $1}'" % datadir
[*] disk = os.popen(df).read().strip()
[*] if not disk:
[*] break
[*] else:
[*] if int(disk) < 80:
[*] break
[*] else:
[*] days = days - 1
[*] if days == 1:
[*] break
[*] else:
[*] sys.exit()
[*]
[*]if __name__ == "__main__":
[*] find_logdir()
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