AWS 无服务器函数：无法访问 aws-sdk 对象的方法...“不是函数”

Question

我在 CloudFormation 模板中有一个无服务器函数，用于实例化 AWS Connect 实例。但是，我无法访问 aws-sdk 对象上的任何方法，抛出的错误是“connect.createInstance 不是函数”。当我在对象上调用 getOwnPropertyNames 时，它返回以下内容，而不是我尝试访问的方法： [ '配置', 'isGlobalEndpoint', '端点', '_events', 'MONITOR_EVENTS_BUBBLE', 'CALL_EVENTS_BUBBLE', '_originalConfig', '_clientId' ]

作为测试，我实例化了一个 S3 对象并在其上调用 getOwnPropertyNames 返回完全相同的内容。我究竟做错了什么？我在这里遵循规范形式：

https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Connect.html#createInstance-property

AWSTemplateFormatVersion: "2010-09-09"
Transform: "AWS::Serverless-2016-10-31"
Parameters:
  IdentityManagementType:
    Description: The type of identity management for your Amazon Connect users.
    Type: String
    AllowedValues: ["SAML", "CONNECT_MANAGED", "EXISTING_DIRECTORY"]
    Default: "SAML"
  InboundCallsEnabled:
    Description: Whether your contact center handles incoming contacts.
    Type: String
    AllowedValues: [true, false]
    Default: true
  InstanceAlias:
    Description: The name for your instance.
    Type: String
    MaxLength: 62
  OutboundCallsEnabled:
    Description: Whether your contact center allows outbound calls.
    Type: String
    AllowedValues: [true, false]
    Default: true
  DirectoryId:
    Description: Optional. The identifier for the directory, if using this type of Identity Management.
    Type: String
  ClientToken:
    Description: Optional. The idempotency token. Used for concurrent deployments
    Type: String
    MaxLength: 500
  Region:
    Description: Region to place the AWS Connect Instance
    Type: String
    Default: us-east-1

#Handler for optional values
Conditions:
  HasClientToken: !Not
    - !Equals
      - ""
      - !Ref ClientToken
  HasDirectoryId: !Not
    - !Equals
      - ""
      - !Ref DirectoryId

Resources:
  LambdaExecutionRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - lambda.amazonaws.com
            Action:
              - sts:AssumeRole
      Path: "/"
      Policies:
        - PolicyName: AWSConnect
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Effect: Allow
                Action:
                  - connect:*
                Resource: arn:aws:connect:*:*
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole

  CreateConnectInstance:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      Runtime: nodejs12.x
      Description: Invoke a function to create an AWS Connect instance
      MemorySize: 128
      Timeout: 8
      Role: !GetAtt LambdaExecutionRole.Arn
      Tracing: Active
      Environment:
        Variables:
          IdentityManagementType:
            Ref: IdentityManagementType
          InboundCallsEnabled:
            Ref: InboundCallsEnabled
          InstanceAlias:
            Ref: InstanceAlias
          OutboundCallsEnabled:
            Ref: OutboundCallsEnabled
          Region:
            Ref: Region
          #Optional Values
          ClientToken: !If
            - HasClientToken
            - !Ref ClientToken
            - !Ref "AWS::NoValue"
          DirectoryId: !If
            - HasClientToken
            - !Ref ClientToken
            - !Ref "AWS::NoValue"
      InlineCode: |
        var AWS = require('aws-sdk');
        var params = {
          IdentityManagementType: process.env.IdentityManagementType,
          InboundCallsEnabled: process.env.InboundCallsEnabled,
          OutboundCallsEnabled: process.env.OutboundCallsEnabled,
          ClientToken: process.env.ClientToken,
          DirectoryId: process.env.DirectoryId,
          InstanceAlias: process.env.InstanceAlias,
        };
        var connect = new AWS.Connect({apiVersion: '2017-08-08'});
        console.log(Object.getOwnPropertyNames(connect)); // ***Not what's expected***
        var createConnectRequest = connect.createInstance(params, function(err, data) {
          if (err) console.log(err, err.stack);
          else     console.log(data);
        }); // ***connect.createInstance is not a function***

  InvokeLambda:
    Type: AWS::CloudFormation::CustomResource
    DependsOn: CreateConnectInstance
    Version: "1.0"
    Properties:
      ServiceToken: !Sub ${CreateConnectInstance.Arn}

Answer 1

AWS Connect createInstance 方法在当前与 AWS Lambda Node.js runtime（在撰写本文时为 v2.771.0）一起部署的 AWS 开发工具包中不可用。 createInstance API 似乎处于预览版中。

该功能是在v2.797.0 中引入的。您可以在本地（在 Lambda 之外）验证这一点。我使用二进制切分方法来测试 2.771.0 和当前 (2.809.0) 之间的 AWS 开发工具包版本以及以下简单代码来验证这一点：

const AWS = require('aws-sdk');
const connect = new AWS.Connect({apiVersion: '2017-08-08'});
connect.createInstance('fred');

changelog 显示了 v2.797.0（除其他外）：

功能：Connect：此版本添加了一组 Amazon Connect API 以编程方式控制实例创建、修改、描述 和删除。

您可以upload a compatible version of the SDK（在您的 Lambda 程序包中或通过 Lambda 层）访问此函数。