创建和删除SLB实例

本文介绍如何使用Python SDK创建一个SLB实例，创建成功后删除该实例。

背景信息

在华北3（张家口）地域创建一个名为SLB1的SLB实例，主可用区为cn-zhangjiakou-a，备可用区为cn-zhangjiakou-b，实例计费类型为按量计费，规格为slb.s1.small，监听的带宽峰值为1Mbps，其他参数使用默认值。实例创建成功后，删除该实例。

1. 在下载的SDK目录中，打开aliyun-openapi-python-sdk-examples\sdk_examples\examples\slb文件夹。
2. 使用编辑器打开slb_quick_start.py文件，您需要配置用户鉴权参数ACS_CLIENT，其他参数根据实际情况配置后，保存退出。
   说明 因为用户鉴权是每个SDK必须执行的操作，所以可以在常量文件中配置AcsClient参数的值，在场景代码中调用常量文件。

   # encoding=utf-8
   import sys
   import json
   
   # 调用AcsClient参数进行身份验证
   from aliyunsdkcore.client import AcsClient
   # 使用阿里云官方sdk的异常处理模块
   from aliyunsdkcore.acs_exception.exceptions import ServerException, ClientException
   # 调用上传证书的API
   from aliyunsdkslb.request.v20140515 import UploadServerCertificateRequest
   # 调用创建SLB实例API
   from aliyunsdkslb.request.v20140515 import CreateLoadBalancerRequest
   # 调用添加默认服务器组API
   from aliyunsdkslb.request.v20140515 import AddBackendServersRequest
   # 调用创建HTTPS监听的API
   from aliyunsdkslb.request.v20140515 import CreateLoadBalancerHTTPSListenerRequest
   # 调用修改HTTPS监听的API
   from aliyunsdkslb.request.v20140515 import SetLoadBalancerHTTPSListenerAttributeRequest
   # 调用删除SLB实例API
   from aliyunsdkslb.request.v20140515 import DeleteLoadBalancerRequest
   ##异常处理逻辑
   from sdk_lib.exception import ExceptionHandler
   # 命令行导入日志
   from sdk_lib.common_util import CommonUtil
   
   # 用户身份鉴权参数配置
   ACS_CLIENT = AcsClient(
       'your-access-key-id',  # your-access-key-id
       'your-access-key-secret',  # your-access-key-secret
       'cn-zhangjiakou',  # your-region-id
   )
   # 失败重试次数
   TRY_TIME = 3
   '''
   创建slb实例->上传服务器证书->创建https监听->上传新的服务器证书
   ->循环修改https监听配置
   '''
   
   
   def create_load_balancer(params):
       '''
       create_load_balancer：创建slb实例
       官网API参考链接：help.aliyun.com/document_detail/27577.html
       '''
       try:
           # 设置创建SLB实例的调用参数
           request = CreateLoadBalancerRequest.CreateLoadBalancerRequest()
           request.set_MasterZoneId(params["master_zone_id"])
           request.set_SlaveZoneId(params["slave_zone_id"])
           request.set_LoadBalancerName(params["load_balancer_name"])
           request.set_PayType(params["pay_balancer_type"])
           # 发送调用请求并接收返回数据
           response = ACS_CLIENT.do_action_with_exception(request)
           response_json = json.loads(response)
           # 返回结果
           return response_json
       except ServerException as e:
           ExceptionHandler.server_exception(e)
       except ClientException as e:
           ExceptionHandler.client_exception(e)
   
   
   def add_backend_servers(params):
       '''
       add_backend_servers：添加后端服务器
   
       '''
       counter = 0
       while counter < TRY_TIME:
           try:
               # 设置添加默认服务器组的调用参数
               request = AddBackendServersRequest.AddBackendServersRequest()
               # 负载均衡实例的ID
               request.set_LoadBalancerId(params["load_balancer_id"])
               # 要添加的后端服务器列表
               request.set_BackendServers(params["backend_servers"])
               # 发送调用请求并接收返回数据
               response = ACS_CLIENT.do_action_with_exception(request)
               response_json = json.loads(response)
               # 返回结果
               return response_json
           except ServerException as e:
               if ExceptionHandler.server_exception(e):
                   return e
           except ClientException as e:
               if ExceptionHandler.client_exception(e):
                   return e
           finally:
               counter += 1
   
   
   def upload_server_certificate(params):
       '''
       upload_server_certificate：上传服务器证书
   
       '''
       counter = 0
       while counter < TRY_TIME:
           try:
               request = UploadServerCertificateRequest.UploadServerCertificateRequest()
               # 要上传的公钥证书
               request.set_ServerCertificate(params["server_certificate"])
               # 需要上传的私钥
               request.set_PrivateKey(params["private_key"])
               # 发送调用请求并接收返回数据
               response = ACS_CLIENT.do_action_with_exception(request)
               response_json = json.loads(response)
               # 返回结果
               return response_json
           except ServerException as e:
               ExceptionHandler.server_exception(e)
           except ClientException as e:
               ExceptionHandler.client_exception(e)
           finally:
               counter += 1
   
   
   def create_https_listener(params):
       '''
       create_https_listener：创建HTTPS监听
   
       '''
       counter = 0
       while counter < TRY_TIME:
           try:
               request = CreateLoadBalancerHTTPSListenerRequest.CreateLoadBalancerHTTPSListenerRequest()
               # 负载均衡实例的ID
               request.set_LoadBalancerId(params["load_balancer_id"])
               # 监听的带宽峰值
               request.set_Bandwidth(params["bandwidth"])
               # 负载均衡实例前端使用的端口
               request.set_ListenerPort(params["listener_port"])
               # 是否开启健康检查
               request.set_HealthCheck(params["health_check"])
               # 是否开启会话保持
               request.set_StickySession(params["sticky_session"])
               # 负载均衡实例后端使用的端口
               request.set_BackendServerPort(params["backend_server_port"])
               # 服务器证书的ID
               request.set_ServerCertificateId(params["server_certificate_id"])
               # 发送调用请求并接收返回数据
               response = ACS_CLIENT.do_action_with_exception(request)
               response_json = json.loads(response)
               # 返回结果
               return response_json
           except ServerException as e:
               ExceptionHandler.server_exception(e)
           except ClientException as e:
               ExceptionHandler.client_exception(e)
           finally:
               counter += 1
   
   
   def set_https_listener_attribute(params):
       '''
       set_https_listener_attribute：修改HTTPS监听的配置
   
       '''
       counter = 0
       while counter < TRY_TIME:
           try:
               request = SetLoadBalancerHTTPSListenerAttributeRequest.SetLoadBalancerHTTPSListenerAttributeRequest()
               # 负载均衡实例的ID
               request.set_LoadBalancerId(params["load_balancer_id"])
               # 监听的带宽峰值
               request.set_Bandwidth(params["bandwidth"])
               # 负载均衡实例前端使用的端口
               request.set_ListenerPort(params["listener_port"])
               # 是否开启健康检查
               request.set_HealthCheck(params["health_check"])
               # 是否开启会话保持
               request.set_StickySession(params["sticky_session"])
               # 服务器证书的ID
               request.set_ServerCertificateId(params["server_certificate_id"])
               # 发送调用请求并接收返回数据
               response = ACS_CLIENT.do_action_with_exception(request)
               response_json = json.loads(response)
               # 返回结果
               return response_json
           except ServerException as e:
               ExceptionHandler.server_exception(e)
           except ClientException as e:
               ExceptionHandler.client_exception(e)
           finally:
               counter += 1
   
   
   def delete_load_balancer(load_balancer_id):
       '''
       delete_load_balancer：删除slb实例
   
       '''
       try:
           # 设置删除SLB实例的调用参数
           request = DeleteLoadBalancerRequest.DeleteLoadBalancerRequest()
           # 负载均衡实例的ID
           request.set_LoadBalancerId(load_balancer_id)
           # 发送调用请求并接收返回数据
           response = ACS_CLIENT.do_action_with_exception(request)
           response_json = json.loads(response)
           # 返回结果
           return response_json
       except ServerException as e:
           ExceptionHandler.server_exception(e)
       except ClientException as e:
           ExceptionHandler.client_exception(e)
   
   
   def main():
       params = {}
       # 设置创建SLB实例的参数
       # 设置新建SLB实例的主可用区为cn-zhangjiakou-a
       params["master_zone_id"] = "cn-zhangjiakou-a"
       # 设置新建SLB实例的备可用区为cn-zhangjiakou-b
       params["slave_zone_id"] = "cn-zhangjiakou-b"
       # 设置新建SLB实例的名称为SLB1
       params["load_balancer_name"] = "SLB1"
       # 设置新建SLB实例的计费类型为按量计费
       params["pay_balancer_type"] = "PayOnDemand"
   
       # 设置添加到默认服务器组的ECS的实例ID和权重
       params["backend_servers"] = [{"ServerId": "i-8vbe8yixxxxxxxxxxxxxw", "Weight": "100"},
                                    {"ServerId": "i-8vbe8yxxxxxxxxxxxxxj9v", "Weight": "100"}]
   
       # 设置上传服务器证书的参数
   
       # 设置创建HTTPS监听的参数
       # 关闭健康检查
       params["health_check"] = "off"
       # 设置监听的带宽峰值
       params["bandwidth"] = 6
       # 负载均衡实例前端使用的端口
       params["listener_port"] = 80
       # 设置负载均衡实例后端使用的端口
       params["backend_server_port"] = 443
       # 关闭会话保持
       params["sticky_session"] = "off"
   
       # 创建slb实例
       # 获取create_load_balancer函数返回值，load_balancer_json为结果的json串
       load_balancer_json = create_load_balancer(params)
       # 打印 load_balancer_json结果，其中"create_load_balancer"是对json串起的名字
       CommonUtil.log("create_load_balancer", load_balancer_json)
   
       # 上传服务器证书
       # 要上传的公钥证书
       params["server_certificate"] = "-----BEGIN CERTIFICATE-----xxxxxxx-----END CERTIFICATE-----"
       params["private_key"] = "-----BEGIN RSA PRIVATE KEY-----xxxxxxxxxxx-----END RSA PRIVATE KEY-----"
       result_json = upload_server_certificate(params)
       CommonUtil.log("upload_server_certificate", result_json)
       params["server_certificate_id"] = result_json["ServerCertificateId"]
   
       # slb实例id
       params["load_balancer_id"] = load_balancer_json["LoadBalancerId"]
   
       # 创建https监听
       result_json = create_https_listener(params)
       CommonUtil.log("create_https_listener", result_json)
   
       # 上传新的服务器证书
       # 要上传的新公钥证书
       params["server_certificate"] = "-----BEGIN CERTIFICATE-----xxxxxxx-----END CERTIFICATE-----"
       params["private_key"] = "-----BEGIN RSA PRIVATE KEY-----xxxxxxxxxxx-----END RSA PRIVATE KEY-----"
       result_json = upload_server_certificate(params)
       CommonUtil.log("upload_server_certificate", result_json)
       params["server_certificate_id"] = result_json["ServerCertificateId"]
   
       # 修改https监听配置
       result_json = set_https_listener_attribute(params)
       CommonUtil.log("set_https_listener_attribute", result_json)
   
       # 删除slb实例
       # 删除返回的LoadBalancerId对应的SLB实例
       load_balancer_json = delete_load_balancer(load_balancer_json["LoadBalancerId"])
       # 打印 load_balancer_json结果
       CommonUtil.log("delete_load_balancer", load_balancer_json)
   
   
   if __name__ == "__main__":
       sys.exit(main())

3. 进入slb_quick_start.py所在的目录，执行如下命令，运行创建和删除SLB实例示例。

   python slb_quick_start.py

   系统显示类似如下：

   
   ---------------------------create_load_balancer---------------------------
   {
     "VpcId": "",
     "AddressIPVersion": "ipv4",
     "LoadBalancerName": "SLB1",
     "ResourceGroupId": "rg-acfmxxxxxxxxxy",
     "VSwitchId": "",
     "RequestId": "070A9361-EA2B-4A4E-91E8-F70C1E47866A",
     "Address": "172.16.XX.XX",
     "NetworkType": "classic",
     "LoadBalancerId": "lb-8vbninnfxxxxxxxxxxxxx"
   }
   
   ---------------------------delete_load_balancer---------------------------
   {
     "RequestId": "4825E5BB-5131-4A1E-AF67-0EF3E8E5B323"
   }