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将特定的AWS API网关阶段连接到CloudInformation模板中的特定lambda别名

amazon-cloudformation aws-api-gateway aws-lambda amazon-web-services

Hleb · 技术社区 · 6 年前

我为我的AWS API网关和lambda函数创建了cloudformation模板,我需要将特定的API网关阶段连接到特定的lambda别名。我有两个别名—qa和prod,以及两个api阶段(qa和prod也是),在cloudformation模板中,它看起来像:

AWSTemplateFormatVersion: "2010-09-09"

Transform: "AWS::Serverless-2016-10-31"

Description: Lambda function configuration

Resources:
  EndpointLambda:
    Type: "AWS::Lambda::Function"
    Properties:
      FunctionName: "endpoint-lambda"
      Handler: "com.test.aws.RequestHandler::handleRequest"
      Runtime: java8
      Code:
        S3Bucket: "lambda-functions"
        S3Key: "test-endpoint-lambda-0.0.1.jar"
      Description: Test Lambda function
      MemorySize: 256
      Timeout: 60
      Environment:
        Variables:
          ES_HOST: test-es-host-url
          ES_ON: true
          ES_PORT: 443
          ES_PROTOCOL: https
          REDIS_URL: test-redis-host-url

  QaLambdaAlias:
    Type: "AWS::Lambda::Alias"
    Properties:
      FunctionName: !Ref EndpointLambda
      FunctionVersion: 1
      Name: "QA"
      Description: "QA alias"

  ProdLambdaAlias:
    Type: "AWS::Lambda::Alias"
    Properties:
      FunctionName: !Ref EndpointLambda
      FunctionVersion: 1
      Name: "Prod"
      Description: "Production alias"

  RestApi:
    Type: "AWS::ApiGateway::RestApi"
    Properties:
      Name: "test-rest-api"
      Description: "Test REST API"

  RestApiResource:
    Type: "AWS::ApiGateway::Resource"
    Properties:
      RestApiId: !Ref "RestApi"
      ParentId: !GetAtt "RestApi.RootResourceId"
      PathPart: "/test"

  RestApiDeployment:
    Type: "AWS::ApiGateway::Deployment"
    Properties:
      RestApiId: !Ref "RestApi"

  QaRestApiStage:
    Type: "AWS::ApiGateway::Stage"
    Properties:
      DeploymentId: !Ref "RestApiDeployment"
      RestApiId: !Ref "RestApi"
      StageName: "qa"

  ProdRestApiStage:
    Type: "AWS::ApiGateway::Stage"
    Properties:
      DeploymentId: !Ref "RestApiDeployment"
      RestApiId: !Ref "RestApi"
      StageName: "prod"

我如何在模板中描述QA API阶段应该调用lambda函数的QA别名和prod-stage-prod别名?

1 回复 | 直到 6 年前

JohnB 6 年前

首先要了解如何使用图形用户界面。这里有一些关于你想做什么的文档。如果这是您第一次设置这个,您还需要添加一些额外的权限,包括在这里-

https://docs.aws.amazon.com/apigateway/latest/developerguide/stage-variables.html

但要快速回答问题,您需要查找的是$:StageVariables.Stage它所做的是链接要触发的lambda的别名。在GUI中,它看起来像这样:

这将允许lambda触发某个别名。一旦输入了这个选项,当在API网关中使用测试功能时,您将能够看到一个新的选项。所以在这里您将指定QA。

所以,为了在云形成中反映这一点,我们需要做一些类似的事情-

  RestApi:
      Type: "AWS::ApiGateway::RestApi"
      Properties:
          Name: "test-rest-api"
          Description: "Test REST API"
          paths:
              /ExamplePath:
                put:
                    #Here will go all the configuration setting you want
                    #Such as security, httpMethod, amd passthroughBehavior
                    #But what you need is
                    uri: 'arn:aws:apigateway:${AWS:Region}:lambda:path/2-15/03/31/functions/${LambdaARN}:${!stageVariables.stage}/invocations'

有关此的详细信息,请参见: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-apitgateway-method-integration.html 你想看到的是在页面的最底部。希望这有帮助!