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ECSLaunchConfiguration:
  DependsOn: ECSCluster
  Type: AWS::AutoScaling::LaunchConfiguration
  Properties:
    ...
    UserData:
      "Fn::Base64": !Sub |
        #!/bin/bash

        export HTTP_PROXY=${ProxyHost}:${ProxyPort}

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Parameters:
  Environment:
    Description: An environment name that will be prefixed to resource names
    Type: String

  Namespace:
    Description: An infrastructure namespace that will be prefixed to resource names
    Type: String
    Default: simple-api

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VPC:
  Type: AWS::EC2::VPC
  Properties:
    CidrBlock: !Ref VpcCIDR
    Tags:
      - Key: Name
        Value: !Sub ${Namespace}-${Environment}-VPC

InternetGateway:
  Type: AWS::EC2::InternetGateway

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Mappings:
  AWSRegionToAMI:
    ap-southeast-2:
      AMI: ami-942dd1f6

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PublicSubnet1:
  Type: AWS::EC2::Subnet
  Properties:
    VpcId: !Ref VPC
    AvailabilityZone: !Select [ 0, !GetAZs ]
    CidrBlock: !Ref PublicSubnet1CIDR
    MapPublicIpOnLaunch: true
    Tags:
      - Key: Name
        Value: !Sub ${Namespace}-${Environment}-public-subnet-az1

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NatGateway1EIP:
  Type: AWS::EC2::EIP
  DependsOn: InternetGatewayAttachment
  Properties:
    Domain: vpc

NatGateway2EIP:
  Type: AWS::EC2::EIP
  DependsOn: InternetGatewayAttachment
  Properties:

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PublicRouteTable:
  Type: AWS::EC2::RouteTable
  Properties:
    VpcId: !Ref VPC
    Tags:
      - Key: Name
        Value: !Sub ${Namespace}-${Environment}-public-routes

PrivateRouteTable1:
  Type: AWS::EC2::RouteTable

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LoadBalancerSecurityGroup:
  Type: AWS::EC2::SecurityGroup
  Properties:
    GroupDescription: Access to load balancer that sits in front of EC2 hosts
    VpcId: !Ref VPC
    SecurityGroupIngress:
      - CidrIp: 0.0.0.0/0
        IpProtocol: -1
    Tags:
      - Key: Name

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LoadBalancer:
  Type: AWS::ElasticLoadBalancingV2::LoadBalancer
  Properties:
    Name: !Sub ${Namespace}-${Environment}-ALB
    Subnets:
      - !Ref PublicSubnet1
      - !Ref PublicSubnet2
    SecurityGroups:
      - !Ref LoadBalancerSecurityGroup
    Tags:

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AutoScalingGroup:
  Type: AWS::AutoScaling::AutoScalingGroup
  Properties:
    VPCZoneIdentifier:
      - !Ref PrivateSubnet1
      - !Ref PrivateSubnet2
    LaunchConfigurationName: !Ref LaunchConfiguration
    MinSize: 4
    MaxSize: 4
    DesiredCapacity: 4