Python3编程实现获取阿里云ECS实例及监控的方法

#!/usr/bin/env python3.5# -*- coding:utf8 -*-try: import httplibexcept ImportError:  import http.client as httplibimport sys,datetimeimport urllibimport urllib.requestimport urllib.errorimport urllib.parseimport timeimport jsonimport base64import hmac,sslimport uuidfrom hashlib import sha1# 解决 访问ssl网站证书的问题try:  _create_unverified_https_context = ssl._create_unverified_contextexcept AttributeError:  # Legacy Python that doesn't verify HTTPS certificates by default  passelse:  # Handle target environment that doesn't support HTTPS verification  ssl._create_default_https_context = _create_unverified_https_contextclass aliyunclient:  def __init__(self):    self.access_id = '阿里云access_id'    self.access_secret ='阿里云secret'    #监控获取ECS URL    self.url = 'https://ecs.aliyuncs.com'  # #签名  def sign(self,accessKeySecret, parameters):    sortedParameters = sorted(parameters.items(), key=lambda parameters: parameters[0])    canonicalizedQueryString = ''    for (k,v) in sortedParameters:      canonicalizedQueryString += '&' + self.percent_encode(k) + '=' + self.percent_encode(v)    stringToSign = 'GET&%2F&' + self.percent_encode(canonicalizedQueryString[1:]) # 使用get请求方法    bs = accessKeySecret +'&'    bs = bytes(bs,encoding='utf8')    stringToSign = bytes(stringToSign,encoding='utf8')    h = hmac.new(bs, stringToSign, sha1)    # 进行编码    signature = base64.b64encode(h.digest()).strip()    return signature  def percent_encode(self,encodeStr):    encodeStr = str(encodeStr)    res = urllib.request.quote(encodeStr)    res = res.replace('+', '%20')    res = res.replace('*', '%2A')    res = res.replace('%7E', '~')    return res  # 构建除共公参数外的所有URL  def make_url(self,params):    timestamp = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())    parameters = {      'Format' : 'JSON',      'Version' : '2014-05-26',      'AccessKeyId' : self.access_id,      'SignatureVersion' : '1.0',      'SignatureMethod' : 'HMAC-SHA1',      'SignatureNonce' : str(uuid.uuid1()),      'TimeStamp' : timestamp,    }    for key in params.keys():      parameters[key] = params[key]    signature = self.sign(self.access_secret,parameters)    parameters['Signature'] = signature    url = self.url + "/?" + urllib.parse.urlencode(parameters)    return url  def do_action(self,params):    url = self.make_url(params)    # print(url)    request = urllib.request.Request(url)    try:      conn = urllib.request.urlopen(request)      response = conn.read().decode()    except urllib.error.HTTPError as e:      print(e.read().strip())      raise SystemExit(e)    try:      res = json.loads(response)    except ValueError as e:      raise SystemExit(e)    return res# 继承原始类class client(aliyunclient):  def __init__(self,InstanceIds):    aliyunclient.__init__(self)    self.InstanceIds = InstanceIds    # ECS 区域    self.RegionId = "cn-shanghai"  # 时间UTC转换  def timestrip(self):    UTCC = datetime.datetime.utcnow()    utcbefore5 = UTCC - datetime.timedelta(minutes =5)    Endtime = datetime.datetime.strftime(UTCC, "%Y-%m-%dT%H:%M:%SZ")    StartTime = datetime.datetime.strftime(utcbefore5, "%Y-%m-%dT%H:%M:%SZ")    return (StartTime,Endtime)  def DescribeInstanceMonitorData(self):    '''    构造实例监控序列函数    '''    self.tt = self.timestrip()    action_dict ={"StartTime":self.tt[0],"Endtime":self.tt[1],"Action":"DescribeInstanceMonitorData","RegionId":self.RegionId,"InstanceId":self.InstanceId}    return action_dict  def DescribeInstances(self):    '''    构建实例配置查询函数    '''    action_dict = {"Action":"DescribeInstances","RegionId":self.RegionId,"InstanceIds":self.InstanceIds}    return action_dict  def alis_main(self):    res = self.do_action(self.DescribeInstances())    listarry = len(res["Instances"]["Instance"])    a = {}    cpu = 0    InternetBandwidth = 0    instanlist = {"data":a}    # 调用所有符合条件的实例配置数据    for i in range(0,listarry):      self.InstanceId = res["Instances"]["Instance"][i]["InstanceId"]      BandwidthOUT = res["Instances"]["Instance"][i]["InternetMaxBandwidthOut"]      # 调用计算该实例的监控数据      monitordata = self.do_action(self.DescribeInstanceMonitorData())      data = monitordata["MonitorData"]["InstanceMonitorData"]      for i in range(0,len(data)):        cpu += data[i]["CPU"]        InternetBandwidth += data[i]["InternetBandwidth"]      # 对该实例数据生成字典      arry = {"BandwidthOUT":BandwidthOUT,"cpu":cpu/len(data),"InternetBandwidth":InternetBandwidth/len(data)}      # 将新数据重构到原字典数据      a.setdefault(self.InstanceId,arry)    return instanlistif __name__ == "__main__":  # 传实例ID 列表进去  clt= client(["i-11cy8adf2x"])  res = clt.alis_main()  print(res)# 获取的结果如下：{'data': {'i-11cy8adf2x': {'InternetBandwidth': 0.0, 'cpu': 4.0, 'BandwidthOUT': 4}}}# 解释 获取所有实例的 当前配置的带宽值 当前占用的CPU% 当前占用的出口带宽 kbps