AWS CloudFormation template that creates EC2 and calls Lambda - Custom Resource in order to get the latest Windows AMI Id

aws-custom-resource-ec2.yaml

AWSTemplateFormatVersion: 2010-09-09
Description: Secondary CF Stack with EC2 and Custom Resource
#-------------------------------------------------------------------------------
Parameters:
  PrimaryStack:
    Description: "Please provide a name of the primary stack with Lambda"
    Type: "String"
  InstanceType:
    Description: EC2 instance type
    Type: String
    Default: t2.micro
    ConstraintDescription: Must be a valid EC2 instance type
  InstanceName:
    Description: EC2 Instance Name Tag
    Type: String
  DiskSize:
    Description: Instance Primary Disk Size (Gb)
    Type: Number
    Default : 50
  KeyName:
    Description: SSH Key Name
    Type: AWS::EC2::KeyPair::KeyName
  InstanceSubnetID:
    Description: Please choose Subnet
    Type: AWS::EC2::Subnet::Id
  InstanceSGID:
    Description: Please choose Security Group
    Type: AWS::EC2::SecurityGroup::Id
  WindowsVersion:
    Description: Windows Version
    Type: String
    Default: Windows Server 2016 Base English 64-bit (x86)
    AllowedValues:
      - Windows Server 2008 SP2 English 32-bit
      - Windows Server 2008 SP2 English 64-bit
      - Windows Server 2008 R2 English 64-bit
      - Windows Server 2012 RTM English 64-bit
      - Windows Server 2012 R2 English 64-bit
      - Windows Server 2016 Base English 64-bit (x86)
      - Windows Server 2019 Base English 64-bit (x86)
    ConstraintDescription: Must be a valid Windows version.
#-------------------------------------------------------------------------------
Resources:
  EC2Instance:
    Type: 'AWS::EC2::Instance'
    Properties:
      InstanceType: !Ref InstanceType
      BlockDeviceMappings:
        -
          DeviceName: "/dev/sda1"
          Ebs:
            VolumeSize: !Ref DiskSize
            VolumeType: gp2
      ImageId: !GetAtt
        - AMIInfo
        - Id
      KeyName: !Ref KeyName
      SecurityGroupIds:
        - !Ref InstanceSGID
      SubnetId: !Ref InstanceSubnetID
      Tags:
       - Key: Name
         Value: !Ref InstanceName
  AMIInfo:
    Type: 'Custom::AMIInfo'
    Properties:
      ServiceToken:
        Fn::ImportValue: !Sub "${PrimaryStack}-LambdaARN"
      Region: !Ref 'AWS::Region'
      OSName: !Ref WindowsVersion
#-------------------------------------------------------------------------------
Outputs:
  AMIID:
    Description: The Amazon EC2 instance AMI ID.
    Value: !GetAtt
      - AMIInfo
      - Id