AWSTemplateFormatVersion: "2010-09-09"

Description: 'Template creates a Network Load Balancer in 2 AZs with EIPs listening on TCP port 80. There are no registered targets these would either be EC2 instance IDs added to the targets property of the target group  or defined under the autoscaling group resources  '

Parameters:
  VPC:
    Type: List<AWS::EC2::VPC::Id>

  Subnet1:
    Description: ID of the Subnet the instance should be launched in, this will link the instance to the same VPC.
    Type: List<AWS::EC2::Subnet::Id>

  Subnet2:
    Description: ID of the Subnet the instance should be launched in, this will link the instance to the same VPC.
    Type: List<AWS::EC2::Subnet::Id>

  ELBType:
    Type: String
    Default: network

  ELBIpAddressType:
    Type: String
    AllowedValues:
      - ipv4
      - dualstack
    Default: ipv4

Resources:
  EIP1:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

  EIP2:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

  loadBalancer:
    Type: AWS::ElasticLoadBalancingV2::LoadBalancer
    DependsOn:
      - EIP2
      - EIP1
    Properties:
      SubnetMappings:
        - AllocationId: !GetAtt EIP1.AllocationId
          SubnetId: !Select
            - "0"
            - !Ref Subnet1
        - AllocationId: !GetAtt EIP2.AllocationId
          SubnetId: !Select
            - "0"
            - !Ref Subnet2
      Type: !Ref ELBType
      IpAddressType: !Ref ELBIpAddressType

  FirstEIP:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

  SecondEIP:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

  TargetGroup:
    Type: AWS::ElasticLoadBalancingV2::TargetGroup
    Properties:
      Name: MyTargets
      Port: 10
      Protocol: TCP
      TargetGroupAttributes:
        - Key: deregistration_delay.timeout_seconds
          Value: "20"
      VpcId: !Select
        - "0"
        - !Ref VPC

  Listener:
    Type: AWS::ElasticLoadBalancingV2::Listener
    Properties:
      DefaultActions:
        - Type: forward
          TargetGroupArn: !Ref TargetGroup
      LoadBalancerArn: !Ref loadBalancer
      Port: "80"
      Protocol: TCP