Description: >
  Create Application Load Balancer resources for Blue/Green Deployment on ECS. For further reference, please review BluegreenRepo ==> https://github.com/awslabs/ecs-blue-green-deployment

Parameters:
  VpcId:
    Type: String

  VpcCIDR:
    Type: String

  Subnet1:
    Type: AWS::EC2::Subnet::Id
  Subnet2:
    Type: AWS::EC2::Subnet::Id

  Name:
    Type: String


Resources:
  SecurityGroup:
    Type: "AWS::EC2::SecurityGroup"
    Properties:
      GroupDescription: !Sub ${AWS::StackName}-alb
      SecurityGroupIngress:
        - CidrIp: "0.0.0.0/0"
          IpProtocol: "TCP"
          FromPort: 80
          ToPort: 80
        - CidrIp: "0.0.0.0/0"
        # Change above to !Ref VpcCIDR, if you want to restrict the beta version of the traffic to VPC CIDRs only
          IpProtocol: "TCP"
          FromPort: 8080
          ToPort: 8080
      VpcId: !Ref VpcId

  LoadBalancer:
    Type: AWS::ElasticLoadBalancingV2::LoadBalancer
    Properties:
      Name: !Ref Name
      Subnets:
        - !Ref Subnet1
        - !Ref Subnet2
      SecurityGroups:
        - !Ref SecurityGroup
        
Outputs:
  ServiceUrl:
    Description: URL of the load balancer for the sample service.
    Value: !Sub http://${LoadBalancer.DNSName}

  SecurityGroup:
    Value: !Ref SecurityGroup

  LoadBalancerArn:
    Value: !Ref LoadBalancer