template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: 'SAM template for Serverless framework service: '
Parameters:
  CodeDeploySnsTopic:
    Type: String
    Default: codedeploy
    Description: The SNS topic getting code deploy notifications
Resources:
  CodeDeploySetTargetGroupDevSetTargetGroup:
    Type: 'AWS::Serverless::Function'
    Properties:
      Handler: lib/lambdas.setTargetGroup
      Runtime: nodejs14.x
      Description: >-
        Update the target group of the asg after a successfull blue/green
        codedeploy. 
      MemorySize: 128
      Timeout: 3
      Policies:
        - Version: '2012-10-17'
          Statement:
            - Effect: Allow
              Action:
                - 'codedeploy:GetDeployment'
              Resource: !Sub 'arn:aws:ec2:${AWS::Region}:${AWS::AccountId}:deploymentgroup:*'
            - Effect: Allow
              Action:
                - 'autoscaling:AttachLoadBalancerTargetGroups'
              Resource: !Sub 'arn:aws:ec2:${AWS::Region}:${AWS::AccountId}:autoScalingGroup:*:autoScalingGroupName/*'
            - Effect: Allow
              Action:
                - 'autoscaling:DescribeLoadBalancerTargetGroups'
              Resource:
                - '*'
            - Effect: Allow
              Action:
                - 'elasticloadbalancing:DescribeTargetGroups'
              Resource:
                - '*'
      Events:
        Event1:
          Type: SNS
          Properties:
            Topic: !Sub 'arn:aws:sns:${AWS::Region}:${AWS::AccountId}:${CodeDeploySnsTopic}'