CustomLaunchStackBuilder.yaml

AWSTemplateFormatVersion: '2010-09-09'
Description: Build a custom launch stack png with OpenCV. This also creates an S3 bucket, API Gateway.

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

Resources:

    ApiGatewayRestApi:
      Type: AWS::ApiGateway::RestApi
      Properties:
        Name: launch-stack-custom-icon-api
        Description: An API Gateway with a Lambda Integration for Custom Launch Stack Builder
        FailOnWarnings: true
        EndpointConfiguration:
          Types:
            - REGIONAL

    ApiGatewayResource:
        Type: AWS::ApiGateway::Resource
        Properties:
          ParentId: !GetAtt ApiGatewayRestApi.RootResourceId
          PathPart: 'CustomLaunchStackFunction'
          RestApiId: !Ref ApiGatewayRestApi

    ApiGatewayIamRole:
      Type: AWS::IAM::Role
      Properties:
        AssumeRolePolicyDocument:
          Version: '2012-10-17'
          Statement:
            - Sid: ''
              Effect: 'Allow'
              Principal:
                Service:
                  - 'apigateway.amazonaws.com'
              Action:
                - 'sts:AssumeRole'
        Path: '/'
        Policies:
          - PolicyName: LambdaAccess
            PolicyDocument:
              Version: '2012-10-17'
              Statement:
                - Effect: 'Allow'
                  Action: 'lambda:*'
                  Resource: !GetAtt CustomLaunchStackLambda.Arn

    ApiGatewayMethodPOST:
      Type: AWS::ApiGateway::Method
      Properties:
        RestApiId: !Ref ApiGatewayRestApi
        ResourceId: !Ref ApiGatewayResource
        HttpMethod: ANY
        AuthorizationType: NONE
        ApiKeyRequired: false
        Integration:
          Type: AWS
          IntegrationHttpMethod: POST
          Uri: !Sub 'arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${CustomLaunchStackLambda.Arn}/invocations'
          IntegrationResponses:
          - StatusCode: 200
            ResponseParameters:
              method.response.header.Access-Control-Allow-Headers: "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'"
              method.response.header.Access-Control-Allow-Methods: "'POST,OPTIONS'"
              method.response.header.Access-Control-Allow-Origin: "'*'"
            ResponseTemplates:
              application/json: ''
          RequestTemplates:
            application/json: '{"statusCode": 200}'
        RequestParameters:
          method.request.querystring.name: false
        MethodResponses:
        - StatusCode: 200
          ResponseModels:
            application/json: 'Empty'
          ResponseParameters:
              method.response.header.Access-Control-Allow-Headers: false
              method.response.header.Access-Control-Allow-Methods: false
              method.response.header.Access-Control-Allow-Origin: false

    ApiGatewayStage:
      Type: AWS::ApiGateway::Stage
      Properties:
        DeploymentId: !Ref ApiGatewayDeployment
        Description: Lambda API Stage Demo
        RestApiId: !Ref ApiGatewayRestApi
        StageName: 'Demo'

    ApiGatewayDeployment:
      Type: AWS::ApiGateway::Deployment
      DependsOn: ApiGatewayMethodPOST
      Properties:
        Description: Lambda API Deployment
        RestApiId: !Ref ApiGatewayRestApi

    Permission:
      Type: 'AWS::Lambda::Permission'
      DependsOn: ApiGatewayStage
      Properties:
        FunctionName:
          'Fn::GetAtt':
            - CustomLaunchStackLambda
            - Arn
        Action: 'lambda:InvokeFunction'
        Principal: apigateway.amazonaws.com
        SourceArn:
          'Fn::Join':
            - ''
            - - 'arn:aws:execute-api:'
              - Ref: 'AWS::Region'
              - ':'
              - Ref: 'AWS::AccountId'
              - ':'
              - Ref: ApiGatewayRestApi
              - /*


    OpenCVSourceLayer:
      Type: AWS::Lambda::LayerVersion
      DependsOn: CopyZipsInvoke
      Properties:
        CompatibleRuntimes:
          - python3.7
          - python3.8
        Content:
            S3Bucket: !Ref DemoBucket
            S3Key: support-zipfiles/opencv-python3-7-6.zip
        Description: OpenCV Source Layer
        LayerName: opencv-custom-icon-layer

    CustomLaunchStackLambda:
      Type: AWS::Lambda::Function
      DependsOn: CopyZipsInvoke
      Properties:
        Code:
          S3Bucket: !Ref DemoBucket
          S3Key: support-zipfiles/Lambda_Function_Python.zip
        Description: Custom Launch Stack Builder Lambda
        Environment:
          Variables:
            PYTHONPATH: /opt/
            BucketName: !Ref DemoBucket
        FunctionName: CustomLaunchStackFunction
        Handler: lambda_function.lambda_handler
        Layers:
          - !Ref OpenCVSourceLayer
        MemorySize: 1024
        Runtime: python3.7
        Timeout: 900
        Role:
          Fn::GetAtt:
            - LambdaRole
            - Arn

    LambdaRole:
      Type: AWS::IAM::Role
      Properties:
        RoleName:
          Fn::Sub: lambda-role-custom-launch-stack
        AssumeRolePolicyDocument:
          Statement:
            - Action:
              - sts:AssumeRole
              Effect: Allow
              Principal:
                Service:
                - lambda.amazonaws.com
          Version: 2012-10-17
        ManagedPolicyArns:
          - arn:aws:iam::aws:policy/AWSLambdaExecute
          - arn:aws:iam::aws:policy/AmazonS3FullAccess
          - arn:aws:iam::aws:policy/AmazonRekognitionFullAccess
        Path: /

    CopyZipsLambda:
      Type: AWS::Lambda::Function
      Properties:
        Description: Copies objects from a source S3 bucket to a destination
        FunctionName: CustomLaunchStackInitFileCopier
        Handler: index.handler
        Runtime: python3.7
        Role: !GetAtt LambdaRole.Arn
        Timeout: 240
        Code:
          ZipFile: |
            import json
            import logging
            import threading
            import boto3
            import cfnresponse
            def copy_objects(source_bucket, dest_bucket, prefix, objects):
                s3 = boto3.client('s3')
                for o in objects:
                    key = prefix + o
                    copy_source = {
                        'Bucket': source_bucket,
                        'Key': key
                    }
                    print('copy_source: %s' % copy_source)
                    print('dest_bucket = %s'%dest_bucket)
                    print('key = %s' %key)
                    s3.copy_object(CopySource=copy_source, Bucket=dest_bucket,
                          Key=key)
                    s3.put_object_acl(ACL = "public-read", Bucket=dest_bucket, Key = key)
            def delete_objects(bucket, prefix, objects):
                s3 = boto3.client('s3')
                objects = {'Objects': [{'Key': prefix + o} for o in objects]}
                s3.delete_objects(Bucket=bucket, Delete=objects)
            def timeout(event, context):
                logging.error('Execution is about to time out, sending failure response to CloudFormation')
                cfnresponse.send(event, context, cfnresponse.FAILED, {}, None)
            def handler(event, context):
                # make sure we send a failure to CloudFormation if the function
                # is going to timeout
                timer = threading.Timer((context.get_remaining_time_in_millis() / 1000.00) - 0.5, timeout, args=[event, context])
                timer.start()
                print('Received event: %s' % json.dumps(event))
                status = cfnresponse.SUCCESS
                try:
                    source_bucket = event['ResourceProperties']['SourceBucket']
                    dest_bucket = event['ResourceProperties']['DestBucket']
                    prefix = event['ResourceProperties']['Prefix']
                    objects = event['ResourceProperties']['Objects']
                    if event['RequestType'] == 'Delete':
                        delete_objects(dest_bucket, prefix, objects)
                    else:
                        copy_objects(source_bucket, dest_bucket, prefix, objects)
                except Exception as e:
                    logging.error('Exception: %s' % e, exc_info=True)
                    status = cfnresponse.FAILED
                finally:
                    timer.cancel()
                    cfnresponse.send(event, context, status, {}, None)

    S3ApiEndPointLambda:
      Type: AWS::Lambda::Function
      Properties:
        FunctionName: CustomLaunchStackInitCreateApiGatewayURLFile
        Code:
          ZipFile: |
            import boto3
            import os
            import cfnresponse
            import logging
            import threading
            import json

            def timeout(event, context):
              logging.error('Execution is about to time out, sending failure response to CloudFormation')
              cfnresponse.send(event, context, cfnresponse.FAILED, {}, None)

            def lambda_handler(event, context):
              status = cfnresponse.SUCCESS
              timer = threading.Timer((context.get_remaining_time_in_millis() / 1000.00) - 0.5, timeout, args=[event, context])
              timer.start()
              apiString = os.getenv('ApiEndpoint')
              bodyString = f"var appVariables = {{apiEndpoint: '{apiString}'}};"
              try:
                aBucket = os.getenv('Bucket')
                client = boto3.client('s3')

                if event['RequestType'] == 'Delete':
                  client.delete_object(Bucket=aBucket, Key='demo-ui-config.js')
                else:
                  client.put_object(Body=bodyString, Bucket=aBucket, Key='demo-ui-config.js')
                  client.put_object_acl(ACL = "public-read", Bucket = aBucket, Key = 'demo-ui-config.js')
              except Exception as e:
                logging.error('Exception: %s' % e, exc_info=True)
                status = cfnresponse.FAILED
              finally:
                timer.cancel()
                cfnresponse.send(event, context, status, {})
              return True

        Environment:
          Variables:
            ApiEndpoint: !Sub 'https://${ApiGatewayRestApi}.execute-api.${AWS::Region}.amazonaws.com/${ApiGatewayStage}/${CustomLaunchStackLambda}'
            Bucket: !Ref DemoBucket
        Runtime: python3.7
        Handler: index.lambda_handler
        Role:
          Fn::GetAtt:
            - LambdaRole
            - Arn
      DependsOn:
        - ApiGatewayStage
        - DemoBucket

    CopyZipsInvoke:
      Type: AWS::CloudFormation::CustomResource
      DependsOn:
        - CopyZipsLambda
        - DemoBucket
      Version: "1.0"
      Properties:
        ServiceToken: !GetAtt CopyZipsLambda.Arn
        DestBucket: !Ref DemoBucket
        SourceBucket: launch-stack-custom-icon
        Prefix: ''
        Objects:
            - support-zipfiles/Lambda_Function_Python.zip
            - support-zipfiles/opencv-python3-7-6.zip
            - index.html
            - style.css
            - launch-stack-icons/generic-launch-stack.png


    PrimerInvoke:
      Type: AWS::CloudFormation::CustomResource
      DependsOn: S3ApiEndPointLambda
      Version: "1.0"
      Properties:
        ServiceToken: !GetAtt S3ApiEndPointLambda.Arn

    DemoBucket:
      Type: 'AWS::S3::Bucket'
      Properties:
        BucketEncryption:
          ServerSideEncryptionConfiguration:
            - ServerSideEncryptionByDefault:
                SSEAlgorithm: AES256
        WebsiteConfiguration:
          IndexDocument: index.html
          ErrorDocument: index.html
        AccessControl: PublicRead
        PublicAccessBlockConfiguration:
          BlockPublicAcls: false
          BlockPublicPolicy: false
          IgnorePublicAcls: false
          RestrictPublicBuckets: false
        BucketName: !Join
          - "-"
          - - "launch-stack-custom-icon"
            - !Select
              - 0
              - !Split
                - "-"
                - !Select
                  - 2
                  - !Split
                    - "/"
                    - !Ref "AWS::StackId"

Outputs:

  BucketName:
    Value: !Ref DemoBucket

  Endpoint:
    Value: !Sub 'https://${ApiGatewayRestApi}.execute-api.${AWS::Region}.amazonaws.com/${ApiGatewayStage}'