使用Python从rds上下载mysql

#!/usr/bin/python2.6
#coding=utf-8
from aliyunsdkcore import client
from aliyunsdkrds.request.v20140815 import DescribeBackupsRequest
from aliyunsdkrds.request.v20140815 import DescribeBinlogFilesRequest
import json
import urllib
import datetime
import subprocess
import warnings
from retrying import retry

warnings.filterwarnings("ignore")

datadir="/backup01/databackup"
binlogdir="/backup02/binlogbackup"

# 获得时间需要备份的时间范围
def getdate():
        global start_date
        global end_date
        ti = datetime.datetime.strftime(datetime.datetime.now(),'%Y-%m-%d %H:%M')
        time1 = datetime.datetime.strptime(ti,'%Y-%m-%d %H:%M')
        time11 = time1 - datetime.timedelta(hours=8)
        end_date = datetime.datetime.strftime(time11,'%Y-%m-%dT%H:%MZ')
        time22 = time11 - datetime.timedelta(days=1)# 现在前一天的备份
        start_date = datetime.datetime.strftime(time22,'%Y-%m-%dT%H:%MZ')
        return 0
        
        
#回调函数
def Schedule(a,b,c):
        '''
                a:已经下载的数据块
                b:数据块的大小
                c:远程文件的大小
        '''
        per = 100.0 * a * b / c
        if per > 100:
                per = 100
                print '%.2f%%' % per
                
                
# 拉取指定db_instanceid的备份文件
@retry(wait_fixed=10000,stop_max_attempt_number=10)
def downfullbackupfile(db_instanceid):
        print db_instanceid
        startdate = start_date
        enddate = end_date
        clt = client.AcsClient('11111','2222','cn-hangzhou')
        request = DescribeBackupsRequest.DescribeBackupsRequest()
        request.set_accept_format('json')
        request.set_action_name('DescribeBackups')
        request.set_DBInstanceId(db_instanceid)
        request.set_StartTime(startdate)
        request.set_EndTime(enddate)
        result = clt.do_action(request)
        s=json.loads(result)
        list = s['Items']['Backup']
        for i in list:
                DBInstanceId = i['DBInstanceId']
                url = i['BackupDownloadURL']
                idx = url.index('tar.gz')
                filename = url[7:idx+6].replace('/','_')
                Fname="%s_%s" % ( DBInstanceId,filename)
                filename = "%s/%s_%s" % (datadir,DBInstanceId,filename)
                downfile(url,filename)
        return 1
        
        
@retry(wait_fixed=10000,stop_max_attempt_number=10)
def downfile(url,filename):
        urllib.urlretrieve(url,filename,Schedule)
        print filename
        return 1
        
        
# 拉取指定db_instanceid的备份文件
@retry(wait_fixed=10000,stop_max_attempt_number=10)
def downbinlogfile(db_instanceid):
        startdate = start_date.replace("Z",":00Z")
        enddate = end_date.replace("Z",":00Z")
        clt = client.AcsClient('1111','2222','cn-hangzhou')
        request = DescribeBinlogFilesRequest.DescribeBinlogFilesRequest()
        request.set_accept_format('json')
        request.set_action_name('DescribeBinlogFiles')
        request.set_DBInstanceId(db_instanceid)
        request.set_StartTime(startdate)
        request.set_EndTime(enddate)
        result = clt.do_action(request)
        s=json.loads(result)
        list = s['Items']['BinLogFile']
        for i in list:
                DBInstanceId = db_instanceid
                url = i['DownloadLink']
                idx = url.index('.tar?OSSAccessKeyId')
                filename = url[7:idx+4].replace('/','_')
                Fname="%s_%s" % (DBInstanceId,filename)
                filename = "%s/%s_%s" % (binlogdir,DBInstanceId,filename)
                downfile(url,filename)
        return 1  
        
              
#需要备份的db_instanceid
def dblist():
# rdsvm2l47islz43z5f09
        dblist = ['1111','2222','3333']
        for db in dblist:
                downfullbackupfile(db)
                downbinlogfile(db)
                
                
# 清理重复的binlog备份
def clearbinlog():
        cmd="find /backup/binlogbackup -name  '*hostins977917*' |  xargs rm  -rf ; find /backup/binlogbackup -name  '*hostins1465579*' |  xargs rm  -rf"
        subprocess.call(cmd,shell=True) 
try:
        if __name__ == "__main__":
                getdate()
                dblist()
#               clearbinlog()
except Exception,e:
        print e