mysql主从日志定期清理shell脚本

#!/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。
##############################################################
# www.jb200.com

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("/")[1]
            if "mysql_log" in logdir.strip():
                port = 3306
            else:
                port = logdir.strip().split("/")[3].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$'|linuxjishu/13830.html target=_blank class=infotextkey>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()