AWSTemplateFormatVersion: '2010-09-09'
Description:  This template deploys a VPC, with a single public subnet.  It deploys an internet gateway, with a default route on the public subnet.
Parameters:
  VpcCIDR:
    Description: Please enter the IP range (CIDR notation) for this VPC
    Type: String
    Default: 10.0.0.0/24

  PublicSubnet1CIDR:
    Description: Please enter the IP range (CIDR notation) for the public subnet in the first Availability Zone
    Type: String
    Default: 10.0.0.0/24

Resources:
  VPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: !Ref VpcCIDR
      EnableDnsSupport: true
      EnableDnsHostnames: true
      Tags:
        - Key: Name
          Value: "CloudWatchEC2AutoAlarmDemo"

  InternetGateway:
    Type: AWS::EC2::InternetGateway
    Properties:
      Tags:
        - Key: Name
          Value: "CloudWatchEC2AutoAlarmDemo"

  InternetGatewayAttachment:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      InternetGatewayId: !Ref InternetGateway
      VpcId: !Ref VPC

  PublicSubnet1:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 0, !GetAZs '' ]
      CidrBlock: !Ref PublicSubnet1CIDR
      MapPublicIpOnLaunch: true
      Tags:
        - Key: Name
          Value: CloudWatchEC2AutoAlarmDemo Public Subnet (AZ1)


  PublicRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC
      Tags:
        - Key: Name
          Value: CloudWatchEC2AutoAlarmDemo Public Routes

  DefaultPublicRoute:
    Type: AWS::EC2::Route
    DependsOn: InternetGatewayAttachment
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref InternetGateway

  PublicSubnet1RouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      RouteTableId: !Ref PublicRouteTable
      SubnetId: !Ref PublicSubnet1


#  Vpc:
#    Condition: CreateSubnet1
#    Type: AWS::EC2::VPC
#    Properties:
#      CidrBlock: !Ref VpcCidr
#      EnableDnsSupport: true
#      EnableDnsHostnames: true
#  PubSubnetAz1:
#    Condition: CreateSubnet1
#    Type: AWS::EC2::Subnet
#    Properties:
#      VpcId: !Ref Vpc
#      CidrBlock: !Ref SubnetCidr1
#      AvailabilityZone: !Select [ 0, !Ref VpcAvailabilityZones ]
#      MapPublicIpOnLaunch: true
#  PubSubnetAz2:
#    Condition: CreateSubnet2
#    Type: AWS::EC2::Subnet
#    Properties:
#      VpcId: !Ref Vpc
#      CidrBlock: !Ref SubnetCidr2
#      AvailabilityZone: !Select [ 1, !Ref VpcAvailabilityZones ]
#      MapPublicIpOnLaunch: true
#  PubSubnetAz3:
#    Condition: CreateSubnet3
#    Type: AWS::EC2::Subnet
#    Properties:
#      VpcId: !Ref Vpc
#      CidrBlock: !Ref SubnetCidr3
#      AvailabilityZone: !Select [ 2, !Ref VpcAvailabilityZones ]
#      MapPublicIpOnLaunch: true
#  InternetGateway:
#    Condition: CreateSubnet1
#    Type: AWS::EC2::InternetGateway
#  AttachGateway:
#    Condition: CreateSubnet1
#    Type: AWS::EC2::VPCGatewayAttachment
#    Properties:
#      VpcId: !Ref Vpc
#      InternetGatewayId: !Ref InternetGateway
#  RouteViaIgw:
#    Condition: CreateSubnet1
#    Type: AWS::EC2::RouteTable
#    Properties:
#      VpcId: !Ref Vpc
#  PublicRouteViaIgw:
#    Condition: CreateSubnet1
#    Type: AWS::EC2::Route
#    DependsOn: AttachGateway
#    Properties:
#      RouteTableId: !Ref RouteViaIgw
#      DestinationCidrBlock: 0.0.0.0/0
#      GatewayId: !Ref InternetGateway
#  PubSubnet1RouteTableAssociation:
#    Condition: CreateSubnet1
#    Type: AWS::EC2::SubnetRouteTableAssociation
#    Properties:
#      SubnetId: !Ref PubSubnetAz1
#      RouteTableId: !Ref RouteViaIgw
#  PubSubnet2RouteTableAssociation:
#    Condition: CreateSubnet2
#    Type: AWS::EC2::SubnetRouteTableAssociation
#    Properties:
#      SubnetId: !Ref PubSubnetAz2
#      RouteTableId: !Ref RouteViaIgw
#  PubSubnet3RouteTableAssociation:
#    Condition: CreateSubnet3
#    Type: AWS::EC2::SubnetRouteTableAssociation
#    Properties:
#      SubnetId: !Ref PubSubnetAz3
#      RouteTableId: !Ref RouteViaIgw