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:
    DependsOn:
      - EIP2
      - EIP1
    Type: AWS::ElasticLoadBalancingV2::LoadBalancer
    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'
  TargetGroup:
    Type: AWS::ElasticLoadBalancingV2::TargetGroup
    Properties:
      Name: dask-scheduler-tg1
      Port: 8787
      Protocol: TCP
      TargetType: 'ip'
      TargetGroupAttributes:
        - Key: deregistration_delay.timeout_seconds
          Value: '300'
      VpcId: !Select
        - '0'
        - !Ref 'VPC'
  Listener:
    Type: AWS::ElasticLoadBalancingV2::Listener
    Properties:
      DefaultActions:
        - Type: forward
          TargetGroupArn: !Ref 'TargetGroup'
      LoadBalancerArn: !Ref 'loadBalancer'
      Port: '80'
      Protocol: TCP