教程：配置主题订阅以调用 Lambda 函数

您可以使用发布到您的亚马逊SNS主题的事件通知来调用 Lambda 函数。配置匹配器时，请务必将通知目标设置为SNS主题的通知目标ARN。

以下 AWS CloudFormation 模板将订阅名为的SNS主题配置为调用名MyFlexMatchEventTopic为的 Lambda 函数。FlexMatchEventHandlerLambdaFunction该模板创建了一个IAM权限策略，允许 Amazon GameLift 写入该SNS主题。然后，该模板为该SNS主题添加了调用 Lambda 函数的权限。

FlexMatchEventTopic:
  Type: "AWS::SNS::Topic"
  Properties:
    KmsMasterKeyId: alias/aws/sns #Enables server-side encryption on the topic using an AWS managed key 
    Subscription:
      - Endpoint: !GetAtt FlexMatchEventHandlerLambdaFunction.Arn
        Protocol: lambda
    TopicName: MyFlexMatchEventTopic

FlexMatchEventTopicPolicy:
  Type: "AWS::SNS::TopicPolicy"
  DependsOn: FlexMatchEventTopic
  Properties:
    PolicyDocument:
      Version: "2012-10-17"
      Statement:
        - Effect: Allow
          Principal:
            Service: gamelift.amazonaws.com
          Action:
            - "sns:Publish"
          Resource: !Ref FlexMatchEventTopic
    Topics:
      - Ref: FlexMatchEventTopic

FlexMatchEventHandlerLambdaPermission:
  Type: "AWS::Lambda::Permission"
  Properties:
    Action: "lambda:InvokeFunction"
    FunctionName: !Ref FlexMatchEventHandlerLambdaFunction
    Principal: sns.amazonaws.com
    SourceArn: !Ref FlexMatchEventTopic