阿里云数据库Redis备份下载（Python）

#!/usr/bin/env python3.6
#coding=utf-8
import os
import urllib.request, json, datetime, time
import ssl
from aliyunsdkcore.client import AcsClient
from aliyunsdkr_kvstore.request.v20150101.DescribeBackupsRequest import DescribeBackupsRequest
from aliyunsdkr_kvstore.request.v20150101.DescribeInstancesRequest import DescribeInstancesRequest
 
 
client = AcsClient('********************', '**************************', 'cn-xxx')
 
 
#获取阿里云redis实例列表
def get_redis_insts():
    request = DescribeInstancesRequest()
    request.set_accept_format('json')
    request.set_PageNumber(1)
    request.set_PageSize(100)
    response = client.do_action_with_exception(request)
    return json.loads(response).get('Instances')['KVStoreInstance']
 
 
#根据实例ID获取备份下载地址列表
def get_bak_urls(instId, startTime, endTime):
    request = DescribeBackupsRequest()
    request.set_accept_format('json')
    request.set_StartTime(startTime)
    request.set_EndTime(endTime)
    request.set_InstanceId(instId)
    response = client.do_action_with_exception(request)
    return json.loads(response).get('Backups').get('Backup')
 
 
#根据下载地址下载备份到本地（IDC备份机111.11.11.11）
def get_redis_bak(folder_path,url):
    if not os.path.exists(folder_path):
        print("Selected folder not exist, try to create it.")
        os.makedirs(folder_path)
    filename = url.split('/')[-1].split('?')[0]
    filepath = folder_path + '/' + filename
    if os.path.exists(filepath):
        print("File have already exist. skip")
    else:
        try:
            print("Try downloading file: {}".format(url))
            ssl._create_default_https_context = ssl._create_unverified_context #导入ssl时关闭证书验
            urllib.request.urlretrieve(url, filename=filepath)
            print("Done")
        except Exception as e:
            print("Error occurred when downloading file, error message:")
            print(e)
 
 
#清理30天前的备份文件
def fileremove(filename, remove_time):
    timeInt = os.path.getmtime(filename)
    sec = remove_time * 86400
    cc = time.time()
    if int(timeInt) < int(cc)-int(sec):
        os.remove(filename)
 
 
def delFilesOfDirAndSubdir(filedir, deltime):
    if os.path.isfile(filedir):
        fileremove(filedir, deltime)
    else:
        try:
            for i in os.listdir(filedir):
                if os.path.isfile(filedir + '/' +i):
                   fileremove(filedir + '/' + i, deltime)
                else:
                    new_dir = filedir + '/' + i
                    delFilesOfDirAndSubdir(new_dir, deltime)
        except Exception as e:
            print("Error occurred when remove file, error message:")
            print(e)
 
 
if __name__ == "__main__":
    delFilesOfDirAndSubdir('/backup/aliyun_redis_bak', 30)
    now = datetime.datetime.now()
    thirtyDaysAgo = (datetime.datetime.now() - datetime.timedelta(days=30))
    endTime = now.strftime("%Y-%m-%dT%H:%MZ")
    startTime = thirtyDaysAgo.strftime("%Y-%m-%dT%H:%MZ")
    for kvs in get_redis_insts():
        print('Begin get baks of: '+ kvs['InstanceName'])
        bakList = get_bak_urls(kvs['InstanceId'], startTime, endTime)
        for bak in bakList:
            get_redis_bak(kvs['InstanceName'],bak['BackupDownloadURL'])
        print('End  get baks of: '+ kvs['InstanceName'])
 
 
#pip install aliyun-python-sdk-core-v3
#pip install aliyun-python-sdk-r-kvstore