CloudformationでALB作成

ALBでコードを作りました。

AWSTemplateFormatVersion: '2010-09-09'
Description: ALB and EC2 with CloudFormation

Parameters:
  Subnet1:
    Type: String
    Description: Subnet 1 ID
  Subnet2:
    Type: String
    Description: Subnet 2 ID
  VpcId:
    Type: String
    Description: VPC ID
  KeyName:
    Type: String
    Description: Name of an existing EC2 KeyPair for SSH access

Resources:
  # Security Group for ALB and EC2
  MySecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Security group for ALB and EC2
      VpcId: !Ref VpcId
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 22
          ToPort: 22
          CidrIp: 0.0.0.0/0  # Restrict to your IP for SSH access
        - IpProtocol: tcp
          FromPort: 80
          ToPort: 80
          CidrIp: 0.0.0.0/0  # Allow HTTP traffic

  # Load Balancer
  MyLoadBalancer:
    Type: AWS::ElasticLoadBalancingV2::LoadBalancer
    Properties:
      Name: MyLoadBalancer
      Scheme: internet-facing
      Subnets:
        - !Ref Subnet1
        - !Ref Subnet2
      SecurityGroups:
        - !Ref MySecurityGroup

  # Target Group
  MyTargetGroup:
    Type: AWS::ElasticLoadBalancingV2::TargetGroup
    Properties:
      Name: MyTargetGroup
      Port: 80
      Protocol: HTTP
      TargetType: instance
      VpcId: !Ref VpcId
      Targets:
        - Id: !Ref MyEC2Instance

  # EC2 Instance
  MyEC2Instance:
    Type: AWS::EC2::Instance
    Properties:
      ImageId: ami-08ce76bae392de7dc  # Example: Amazon Linux 2 AMI
      InstanceType: t2.micro
      KeyName: !Ref KeyName
      SecurityGroupIds:
        - !Ref MySecurityGroup
      SubnetId: !Ref Subnet1

  # Listener for ALB
  MyALBListener:
    Type: AWS::ElasticLoadBalancingV2::Listener
    Properties:
      DefaultActions:
        - Type: forward
          TargetGroupArn: !Ref MyTargetGroup
      LoadBalancerArn: !Ref MyLoadBalancer
      Port: 80
      Protocol: HTTP

これで構築完了。