使用Python SDK给SLB实例创建TCP监听，创建完成后删除SLB实例。
前提条件
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，其他配置使用系统默认值。
- 将张家口地域的两台ECS实例添加到默认服务器组，用来分发流量，ECS实例的后端服务权重都为100。
- 创建TCP监听，SLB实例前端使用的端口为80，后端服务器开放用来接收请求的端口为80，健康检查协议为TCP，不限制监听带宽峰值，其他使用默认值。
- TCP监听创建完成后，从默认服务器组中移除ECS实例。
- 删除新建的SLB实例。
操作步骤
- 在下载的SDK目录中，打开$aliyun-openapi-python-sdk-examples\sdk_examples\examples\slb文件夹。
- 使用编辑器打开slb_create_tcp_listener.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 """ 创建slb实例->添加后端服务器->创建tcp监听->删除后端服务器->删除slb实例 """ import json import sys import uuid #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 #调用添加TCP监听API from aliyunsdkslb.request.v20140515 import CreateLoadBalancerTCPListenerRequest #调用从默认服务器组中移除ECS实例API from aliyunsdkslb.request.v20140515 import RemoveBackendServersRequest #调用删除SLB实例API from aliyunsdkslb.request.v20140515 import DeleteLoadBalancerRequest #命令行打印日志 from sdk_lib.common_util import CommonUtil #异常处理逻辑 from sdk_lib.exception import ExceptionHandler #client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 ) TRY_TIME = 3 def create_load_balancer(params): ''' create_load_balancer：创建slb实例 ''' 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"]) request.set_LoadBalancerSpec(params["load_balancer_spec"]) request.set_ClientToken(str(uuid.uuid1())) #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"]) request.set_ClientToken(str(uuid.uuid1())) #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 create_tcp_listener(params): ''' create_tcp_listener：创建tcp监听 ''' counter = 0 while counter < TRY_TIME: try: #设置创建TCP监听的调用参数 request = CreateLoadBalancerTCPListenerRequest.CreateLoadBalancerTCPListenerRequest() #负载均衡实例的ID request.set_LoadBalancerId(params["load_balancer_id"]) #负载均衡实例前端使用的端口 request.set_ListenerPort(params["listener_port"]) #负载均衡实例后端使用的端口 request.set_BackendServerPort(params["backend_server_port"]) #监听的健康检查协议 request.set_HealthCheckType(params["listener_health_check"]) #设置监听的带宽峰值 request.set_Bandwidth(params["listener_bandwidth"]) #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 remove_backend_servers(params): ''' add_backend_servers：删除后端服务器 ''' counter = 0 while counter < TRY_TIME: try: #设置删除后端服务器的调用参数 request = RemoveBackendServersRequest.RemoveBackendServersRequest() #负载均衡实例的ID request.set_LoadBalancerId(params["load_balancer_id"]) #要删除的后端服务器列表 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 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实例的主可用区为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" #设置新建SLB实例的规格为slb.s1.small params["load_balancer_spec"] = "slb.s1.small" #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-8vbe8yi8krxxxxxxxxxxw","Weight":"100"},{"ServerId":"i-8vbe8yi8kccxxxxxxxxxv","Weight":"100"}] #设置添加TCP监听的参数 #前端使用的端口为80 params["listener_port"] = 80 #后端服务器开放用来接收请求的端口为80 params["backend_server_port"] = 80 #健康检查协议为TCP params["listener_health_check"] = "tcp" #TCP监听的带宽峰值为-1，即不限制带宽峰值 params["listener_bandwidth"] = -1 #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) #slb实例id params["load_balancer_id"] = load_balancer_json["LoadBalancerId"] #添加后端服务器 load_balancer_json = add_backend_servers(params) CommonUtil.log("add_backend_servers", load_balancer_json) #创建tcp监听 load_balancer_json = create_tcp_listener(params) CommonUtil.log("create_tcp_listener", load_balancer_json) #删除后端服务器 load_balancer_json = remove_backend_servers(params) CommonUtil.log("remove_backend_servers", load_balancer_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()) - 进入slb_create_tcp_listener.py所在的目录，执行如下命令，运行创建TCP监听示例。
python slb_create_tcp_listener.py系统显示类似如下：---------------------------create_load_balancer--------------------------- { "VpcId": "", "AddressIPVersion": "ipv4", "LoadBalancerName": "SLB1", "ResourceGroupId": "rg-acfmxazb4pxxxxx", "VSwitchId": "", "RequestId": "8E72DFDD-E510-4D65-9063-F47B62DE9887", "Address": "39.98.xx.xx", "NetworkType": "classic", "LoadBalancerId": "lb-8vbjd6pzphvjoq29xxxxx" } ---------------------------add_backend_servers--------------------------- { "RequestId": "F6BF0E0B-5837-48A3-9CEC-2EE2CED5293A", "BackendServers": { "BackendServer": [ { "ServerId": "i-8vbe8yi8krqri2axxxxx", "Type": "ecs", "Weight": 100 }, { "ServerId": "i-8vbe8yi8krqri2xxxxxx", "Type": "ecs", "Weight": 100 } ] }, "LoadBalancerId": "lb-8vbjd6pzphvjoq29xxxxx" } ---------------------------create_tcp_listener--------------------------- { "RequestId": "6FF090BD-DF9F-49C6-84A6-30F2D9F88489" } ---------------------------remove_backend_servers--------------------------- { "RequestId": "F7D62969-D7F0-4022-95FA-1710DA448B6A", "BackendServers": { "BackendServer": [] }, "LoadBalancerId": "lb-8vbjd6pzphvjoq29xxxxx" } ---------------------------delete_load_balancer--------------------------- { "RequestId": "1A8CB48F-8242-49A9-9958-E762B1E9BA4D" }