本文介绍如何使用Alibaba Cloud SDK for Python实现同账号同地域下的两个VPC互通。

前提条件

在使用Alibaba Cloud SDK for Python前，您需要完成以下准备工作：
  • 使用Alibaba Cloud SDK for Python，您需要一个阿里云账号和访问密钥（AccessKey）。 请在阿里云控制台中的AccessKey管理页面上创建和查看您的AccessKey。
  • 确保您已经安装了Alibaba Cloud SDK for Python，请参见aliyun-python-sdk-vpc 3.0.8。
  • 下载阿里云专有网络Python SDK场景示例的VPC Python Example库。
    进入setup.py所在的目录，执行如下命令，完成环境初始化配置。 
    python setup.py install

背景信息

创建路由器接口时，请注意：
  • 任意两个路由器之间，最多只能存在一对互连的路由器接口。
  • 一个路由器上可以最多创建5个路由器接口。
  • 如果账户下存在欠费状态的路由器接口，则无法再创建路由器接口。
  • 同一路由表下的路由条目的目标网段（DestinationCidrBlock）不允许相同。
本文代码示例中包含以下操作：
  1. 创建发起端路由器接口。
  2. 创建接收端路由器接口。
  3. 修改发起端路由器接口的信息。
  4. 修改接收端路由器接口的信息。
  5. 查询发起端路由器接口的信息。
  6. 查询接收端路由器接口的信息。
  7. 连接发起端路由器接口和接收端路由器接口。
  8. 创建下一跳为发起端路由器接口的路由条目。
  9. 创建下一跳为接收端路由器接口的路由条目。
  10. 删除下一跳为接收端路由器接口的路由条目。
  11. 删除下一跳为发起端路由器接口的路由条目。
  12. 冻结发起端路由器接口。
  13. 冻结接收端路由器接口。
  14. 删除发起端路由器接口。
  15. 删除接收端路由器接口。

操作步骤

  1. 在下载的SDK目录中，打开$aliyun-openapi-python-sdk-examples\sdk_examples\examples\ec文件夹。
  2. 使用编辑器打开ec_same_account.py文件，根据实际情况配置相关参数，保存退出。
    完整代码示例如下： 
    #encoding=utf-8
import sys
import json
from aliyunsdkcore.acs_exception.exceptions import ServerException, ClientException
from aliyunsdkvpc.request.v20160428 import CreateRouterInterfaceRequest
from aliyunsdkvpc.request.v20160428 import DeleteRouterInterfaceRequest
from aliyunsdkvpc.request.v20160428 import DescribeRouterInterfacesRequest
from aliyunsdkvpc.request.v20160428 import ConnectRouterInterfaceRequest
from aliyunsdkvpc.request.v20160428 import DeactivateRouterInterfaceRequest
from aliyunsdkvpc.request.v20160428 import ModifyRouterInterfaceAttributeRequest
from sdk_lib.sdk_route_entry import RouteEntry
from sdk_lib.exception import ExceptionHandler
from sdk_lib.common_util import CommonUtil
from sdk_lib.check_status import CheckStatus
from sdk_lib.consts import *

client = AcsClient(
            '<your-access-key-id>',     # 您的可用区ID
            '<your-access-key-secret>', # 您的AccessKey ID
            '<your-region-id>')         # 您的AccessKey Secret

class RouterInterface(object):
    def __init__(self, client):
        self.client = client

    def create_router_interface(self, params):
        """
        create_router_interface: 创建路由器接口
        """
        try:
            request = CreateRouterInterfaceRequest.CreateRouterInterfaceRequest()
            # 路由器接口的规格
            request.set_Spec(params['spec'])
            # 路由器接口的角色
            request.set_Role(params['role'])
            # 路由器接口关联的路由器ID
            request.set_RouterId(params['router_id'])
            # 路由器接口关联的路由器类型
            request.set_RouterType(params['router_type'])
            # 连接接收端所在的地域ID
            request.set_OppositeRegionId(params['opposite_region_id'])
            # 对端路由器接口关联的路由器类型
            request.set_OppositeRouterType(params['opposite_router_type'])

            response = self.client.do_action_with_exception(request)
            response_json = json.loads(response)
            # 判断路由器接口状态是否可用
            if CheckStatus.check_status(TIME_DEFAULT_OUT, DEFAULT_TIME,
                                        self.describe_ri_status,
                                        'Idle', response_json['RouterInterfaceId']):
                return response_json
        except ServerException as e:
            ExceptionHandler.server_exception(e)
        except ClientException as e:
            ExceptionHandler.client_exception(e)

    def connect_router_interface(self, params):
        """
        connect_router_interface: 由发起端路由器接口向接收端发起连接
        """
        try:
            request = ConnectRouterInterfaceRequest.ConnectRouterInterfaceRequest()
            # 发起端路由器接口的ID
            request.set_RouterInterfaceId(params['router_interface_id'])
            response = self.client.do_action_with_exception(request)
            response_json = json.loads(response)
            if CheckStatus.check_status(TIME_DEFAULT_OUT * 5, DEFAULT_TIME * 5,
                                        self.describe_ri_status,
                                        'Active', params['router_interface_id']):
                return response_json
        except ServerException as e:
            ExceptionHandler.server_exception(e)
        except ClientException as e:
            ExceptionHandler.client_exception(e)

    def deactivate_router_interface(self, params):
        """
        deactivate_router_interface: 冻结路由器接口
        """
        try:
            request = DeactivateRouterInterfaceRequest.DeactivateRouterInterfaceRequest()
            # 路由器接口的ID
            request.set_RouterInterfaceId(params['router_interface_id'])
            response = self.client.do_action_with_exception(request)
            response_json = json.loads(response)
            # 判断路由器接口状态是否可用
            if CheckStatus.check_status(TIME_DEFAULT_OUT * 5, DEFAULT_TIME * 5,
                                        self.describe_ri_status,
                                        'Inactive', params['router_interface_id']):
                return response_json
        except ServerException as e:
            ExceptionHandler.server_exception(e)
        except ClientException as e:
            ExceptionHandler.client_exception(e)

    def modify_router_interface_attribute(self, params):
        """
        modify_router_interface_attribute: 修改路由器接口的配置
        """
        try:
            request = ModifyRouterInterfaceAttributeRequest.ModifyRouterInterfaceAttributeRequest()
            # 路由器接口的ID
            request.set_RouterInterfaceId(params['router_interface_id'])
            # 对端路由器接口ID
            request.set_OppositeInterfaceId(params['opposite_interface_id'])
            # 对端的路由器的ID
            request.set_OppositeRouterId(params['opposite_router_id'])
            response = self.client.do_action_with_exception(request)
            response_json = json.loads(response)
            # 判断路由器接口状态是否可用
            if CheckStatus.check_status(TIME_DEFAULT_OUT, DEFAULT_TIME,
                                        self.describe_ri_status,
                                        'Idle', params['router_interface_id']):
                return response_json
        except ServerException as e:
            ExceptionHandler.server_exception(e)
        except ClientException as e:
            ExceptionHandler.client_exception(e)



    def describe_router_interface(self, instance_id):
        """
        describe_router_interface: 查询指定地域内的路由器接口
        """
        try:
            request = DescribeRouterInterfacesRequest.DescribeRouterInterfacesRequest()
            # 查询的过滤类型
            request.add_query_param('Filter.1.Key', "RouterInterfaceId")
            # 查询的实例ID
            request.add_query_param('Filter.1.Value.1', instance_id)
            response = self.client.do_action_with_exception(request)
            response_json = json.loads(response)
            return response_json
        except ServerException as e:
            ExceptionHandler.server_exception(e)
        except ClientException as e:
            ExceptionHandler.client_exception(e)

    def describe_ri_status(self, instance_id):
        """
        describe_ri_status: 查询指定地域内的路由器接口状态
        """
        response = self.describe_router_interface(instance_id)
        if len(response['RouterInterfaceSet']['RouterInterfaceType']) == 0:
            return ''
        return response['RouterInterfaceSet']['RouterInterfaceType'][0]['Status']

    def delete_router_interface(self, params):
        """
        delete_router_interface: 删除路由器接口
        """
        try:
            request = DeleteRouterInterfaceRequest.DeleteRouterInterfaceRequest()
            # 路由器接口的ID
            request.set_RouterInterfaceId(params['instance_id'])
            response = self.client.do_action_with_exception(request)
            response_json = json.loads(response)
            # 判断Router Interface状态是否可用
            if CheckStatus.check_status(TIME_DEFAULT_OUT, DEFAULT_TIME * 5,
                                        self.describe_ri_status,
                                        '', params['instance_id']):
                return response_json
        except ServerException as e:
            ExceptionHandler.server_exception(e)
        except ClientException as e:
            ExceptionHandler.client_exception(e)

def main():
    client = ACS_CLIENT
    router_interface = RouterInterface(client)
    route_entry = RouteEntry(client)

    params = {}
    params['spec'] = "Large.2"
    params['role'] = "InitiatingSide"
    params['router_id'] = ROUTER_ID
    params['router_type'] = "VRouter"
    params['opposite_region_id'] = "cn-hangzhou"
    params['opposite_router_type'] = "VRouter"

    # 创建发起端路由器接口
    router_interface_json = router_interface.create_router_interface(params)
    CommonUtil.log("create_router_interface", router_interface_json)

    # 创建接收端路由器接口
    params['spec'] = "Negative"
    params['role'] = "AcceptingSide"
    params['router_id'] = ROUTER_ID2
    router_interface_json2 = router_interface.create_router_interface(params)
    CommonUtil.log("create_router_interface", router_interface_json2)

    # 修改发起端路由器接口信息
    params['router_interface_id'] = router_interface_json['RouterInterfaceId']
    params['opposite_interface_id'] = router_interface_json2['RouterInterfaceId']
    params['opposite_router_id'] = ROUTER_ID2
    modify_ri_json = router_interface.modify_router_interface_attribute(params)
    CommonUtil.log("modify_router_interface_attribute", modify_ri_json)

    # 修改接收端路由器接口信息
    params['router_interface_id'] = router_interface_json2['RouterInterfaceId']
    params['opposite_interface_id'] = router_interface_json['RouterInterfaceId']
    params['opposite_router_id'] = ROUTER_ID
    modify_ri_json2 = router_interface.modify_router_interface_attribute(params)
    CommonUtil.log("modify_router_interface_attribute", modify_ri_json2)

    # 查询发起端路由器接口信息
    describe_ri_json = router_interface.describe_router_interface(router_interface_json['RouterInterfaceId'])
    CommonUtil.log("describe_router_interface", describe_ri_json)

    # 查询接收端路由器接口信息
    describe_ri_json2 = router_interface.describe_router_interface(router_interface_json2['RouterInterfaceId'])
    CommonUtil.log("describe_router_interface", describe_ri_json2)

    # 发起连接
    params['router_interface_id'] = router_interface_json['RouterInterfaceId']
    connect_ri_json = router_interface.connect_router_interface(params)
    CommonUtil.log("connect_router_interface", connect_ri_json)

    # 创建下一跳为发起端路由器接口的路由条目
    params['route_table_id'] = TABLE_ID
    params['destination_cidr_block'] = "0.0.0.0/0"
    params['nexthop_type'] = 'RouterInterface'
    params['nexthop_id'] = router_interface_json['RouterInterfaceId']
    route_entry_json = route_entry.create_route_entry(params)
    CommonUtil.log("create_route_entry", route_entry_json)

    # 创建下一跳为接收端路由器接口的路由条目
    params['route_table_id'] = TABLE_ID2
    params['destination_cidr_block'] = "0.0.0.0/0"
    params['nexthop_type'] = 'RouterInterface'
    params['nexthop_id'] = router_interface_json2['RouterInterfaceId']
    route_entry_json2 = route_entry.create_route_entry(params)
    CommonUtil.log("create_route_entry", route_entry_json2)

    # 删除下一跳为接收端路由器接口的路由条目
    route_entry_json = route_entry.delete_route_entry(params)
    CommonUtil.log("delete_route_entry", route_entry_json)

    # 删除下一跳为发起端路由器接口的路由条目
    params['route_table_id'] = TABLE_ID
    params['nexthop_id'] = router_interface_json['RouterInterfaceId']
    route_entry_json = route_entry.delete_route_entry(params)
    CommonUtil.log("delete_route_entry", route_entry_json)

    # 冻结发起端路由器接口
    params['router_interface_id'] = router_interface_json['RouterInterfaceId']
    deactivate_ri_json = router_interface.deactivate_router_interface(params)
    CommonUtil.log("deactivate_router_interface", deactivate_ri_json)

    # 冻结接收端路由器接口
    params['router_interface_id'] = router_interface_json2['RouterInterfaceId']
    deactivate_ri_json2 = router_interface.deactivate_router_interface(params)
    CommonUtil.log("deactivate_router_interface", deactivate_ri_json2)

    # 删除发起端路由器接口
    params['instance_id'] = router_interface_json['RouterInterfaceId']
    router_interface_json = router_interface.delete_router_interface(params)
    CommonUtil.log("delete_router_interface", router_interface_json)

    # 删除接收端路由器接口
    params['instance_id'] = router_interface_json2['RouterInterfaceId']
    router_interface_json2 = router_interface.delete_router_interface(params)
    CommonUtil.log("delete_router_interface", router_interface_json2)


if __name__ == '__main__':
    sys.exit(main())
  3. 进入ec_same_account.py所在的目录，执行如下命令，实现同账号同地域下的两个VPC互通。 
    python ec_same_account.py

执行结果

系统显示类似如下： 
---------------------------create_router_interface---------------------------
{
  "RequestId": "F5493DC1-53B0-4916-874F-87773A54525F", 
  "RouterInterfaceId": "ri-bp1ujwb6xsw16xxxxxxxx"
}
---------------------------create_router_interface---------------------------
{
  "RequestId": "E3F5BE99-B2C5-4751-8173-0F590300EE72", 
  "RouterInterfaceId": "ri-bp1vze2rusg2cxxxxxxxx"
}
---------------------------modify_router_interface_attribute---------------------------
{
  "RequestId": "8D691507-F31A-41E5-9C72-457EFF1F7727"
}
---------------------------modify_router_interface_attribute---------------------------
{
  "RequestId": "2E664208-8F37-4F19-B719-00B4F1AF03B2"
}
---------------------------describe_router_interface---------------------------
{
  "TotalCount": 1, 
  "RouterInterfaceSet": {
    "RouterInterfaceType": [
      {
        "BusinessStatus": "Normal", 
        "CreationTime": "2019-04-30T06:09:16Z", 
        "Role": "InitiatingSide", 
        "OppositeRouterId": "vrt-bp141no9pds2bxxxxxxxx", 
        "Spec": "Large.2", 
        "Status": "Idle", 
        "EndTime": "2999-09-08T16:00:00Z", 
        "OppositeInterfaceSpec": "Negative", 
        "RouterInterfaceId": "ri-bp1ujwb6xsw16xxxxxxxx", 
        "RouterType": "VRouter", 
        "OppositeBandwidth": 0, 
        "OppositeVpcInstanceId": "vpc-bp1v31by9jix2xxxxxxxx", 
        "HasReservationData": false, 
        "OppositeInterfaceBusinessStatus": "Normal", 
        "OppositeRouterType": "VRouter", 
        "OppositeRegionId": "cn-hangzhou", 
        "VpcInstanceId": "vpc-bp15opprpg0rgxxxxxxxx", 
        "RouterId": "vrt-bp1ltkytn6lgmxxxxxxxx", 
        "CrossBorder": false, 
        "OppositeInterfaceOwnerId": "", 
        "Bandwidth": 2048, 
        "OppositeInterfaceId": "ri-bp1vze2rusg2cxxxxxxxx", 
        "ChargeType": "AfterPay"
      }
    ]
  }, 
  "PageNumber": 1, 
  "RequestId": "89EF0631-0A36-41AD-A586-AF4FFDA6E68B", 
  "PageSize": 10
}
---------------------------describe_router_interface---------------------------
{
  "TotalCount": 1, 
  "RouterInterfaceSet": {
    "RouterInterfaceType": [
      {
        "Status": "Idle", 
        "OppositeRegionId": "cn-hangzhou", 
        "BusinessStatus": "Normal", 
        "OppositeRouterId": "vrt-bp1ltkytn6lgmxxxxxxxx", 
        "VpcInstanceId": "vpc-bp1v31by9jix2xxxxxxxx", 
        "RouterInterfaceId": "ri-bp1vze2rusg2cxxxxxxxx", 
        "CreationTime": "2019-04-30T06:09:18Z", 
        "RouterType": "VRouter", 
        "OppositeInterfaceOwnerId": "", 
        "RouterId": "vrt-bp141no9pds2bxxxxxxxx", 
        "Bandwidth": 0, 
        "OppositeInterfaceId": "ri-bp1ujwb6xsw16xxxxxxxx", 
        "EndTime": "2999-09-08T16:00:00Z", 
        "ChargeType": "AfterPay", 
        "OppositeVpcInstanceId": "vpc-bp15opprpg0rgxxxxxxxx", 
        "HasReservationData": false, 
        "CrossBorder": false, 
        "OppositeInterfaceBusinessStatus": "Normal", 
        "Spec": "Negative", 
        "OppositeRouterType": "VRouter", 
        "Role": "AcceptingSide"
      }
    ]
  }, 
  "PageNumber": 1, 
  "RequestId": "578448D7-9DCF-4703-8337-EF88DDF2C325", 
  "PageSize": 10
}
---------------------------connect_router_interface---------------------------
{
  "RequestId": "A5DBB86B-F6F5-4A53-899E-8CF4FEF510F2"
}
---------------------------create_route_entry---------------------------
{
  "RequestId": "70D896FE-986B-48EF-9734-17D6BDC8327A"
}
---------------------------create_route_entry---------------------------
{
  "RequestId": "A2233E25-4D6B-4713-A96F-E7CA745973CA"
}
---------------------------delete_route_entry---------------------------
{
  "RequestId": "464C62A4-EE65-4414-AF0A-4984AE6B8696"
}
--------------------------delete_route_entry---------------------------
{
  "RequestId": "0C11A332-969B-47CA-A683-5BFFECA28B3D"
}
---------------------------deactivate_router_interface---------------------------
{
  "RequestId": "018305AD-FB9E-450A-91E8-3830634F5AC2"
}
---------------------------deactivate_router_interface---------------------------
{
  "RequestId": "89B03203-9224-4CA3-8679-E0A49029A2D2"
}
---------------------------delete_router_interface---------------------------
{
  "RequestId": "FB0424CE-D0C7-438B-A3FA-BCF24EE9CC8A"
}
---------------------------delete_router_interface---------------------------
{
  "RequestId": "8A0A0BB6-A69D-461B-A117-14AD6670DECA"
}