Lean version of 3 subnet VPC Template

vpc-lean.template.json

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "VPC Across 3 AZs",
  "Parameters": {
    "EnvName": {
      "Type": "String",
      "Default": "Dev",
      "AllowedValues": [
        "Dev", "Test", "Prod"
      ],
      "Description": "Select the environment name"
    },
    "TargetAZs": {
      "Description": "AZs to create Subnets for. Hardcoded to 3 currently, if you do not supply 3, stack will fail.",
      "Type": "List<AWS::EC2::AvailabilityZone::Name>"
    }
  },
  "Mappings": {
    "SubnetConfig": {
      "VPC": {
        "CIDR": "10.0.0.0/16"
      }, "AZ1-Public": {
        "CIDR": "10.0.32.0/20"
      }, "AZ1-Private": {
        "CIDR": "10.0.0.0/19"
      }, "AZ2-Public": {
        "CIDR": "10.0.96.0/20"
      }, "AZ2-Private": {
        "CIDR": "10.0.64.0/19"
      }, "AZ3-Public": {
        "CIDR": "10.0.160.0/20"
      }, "AZ3-Private": {
        "CIDR": "10.0.128.0/19"
      }
    }
  },
  "Resources": {
    "VPC": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": {"Fn::FindInMap": ["SubnetConfig", "VPC", "CIDR"]},
        "InstanceTenancy": "default",
        "EnableDnsSupport": "true",
        "EnableDnsHostnames": "false",
        "Tags": [
          {
            "Key": "Name", "Value": {"Fn::Join": ["", [{"Ref": "EnvName"}, "_VPC"]]}
          }
        ]
      }
    },
    "SubnetAz1Public": {
      "Type": "AWS::EC2::Subnet", "Properties": {
        "CidrBlock": {
          "Fn::FindInMap": ["SubnetConfig", "AZ1-Public", "CIDR"]
        },
        "AvailabilityZone": {
          "Fn::Select": ["0", {"Ref": "TargetAZs"}]
        },
        "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {
              "Fn::Join": [
                "", [{"Ref": "EnvName"}, "-", {"Fn::Select": ["0", {"Ref": "TargetAZs"}]}, "-public"]
              ]
            }
          }
        ]
      }
    },
    "SubnetAz1Private": {
      "Type": "AWS::EC2::Subnet", "Properties": {
        "CidrBlock": {"Fn::FindInMap": ["SubnetConfig", "AZ1-Private", "CIDR"]},
        "AvailabilityZone": {"Fn::Select": ["0", {"Ref": "TargetAZs"}]}, "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {
              "Fn::Join": [
                "", [{"Ref": "EnvName"}, "-", {"Fn::Select": ["0", {"Ref": "TargetAZs"}]}, "-private"]
              ]
            }
          }
        ]
      }
    },
    "SubnetAz2Public": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "CidrBlock": {"Fn::FindInMap": ["SubnetConfig", "AZ2-Public", "CIDR"]},
        "AvailabilityZone": {"Fn::Select": ["1", {"Ref": "TargetAZs"}]}, "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {
              "Fn::Join": [
                "", [{"Ref": "EnvName"}, "-", {"Fn::Select": ["1", {"Ref": "TargetAZs"}]}, "-public"]
              ]
            }
          }
        ]
      }
    },
    "SubnetAz2Private": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "CidrBlock": {"Fn::FindInMap": ["SubnetConfig", "AZ2-Private", "CIDR"]},
        "AvailabilityZone": {"Fn::Select": ["1", {"Ref": "TargetAZs"}]}, "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {
              "Fn::Join": [
                "", [{"Ref": "EnvName"}, "-", {"Fn::Select": ["1", {"Ref": "TargetAZs"}]}, "-private"]
              ]
            }
          }
        ]
      }
    },
    "SubnetAz3Public": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "CidrBlock": {"Fn::FindInMap": ["SubnetConfig", "AZ3-Public", "CIDR"]},
        "AvailabilityZone": {"Fn::Select": ["2", {"Ref": "TargetAZs"}]}, "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {
              "Fn::Join": [
                "", [{"Ref": "EnvName"}, "-", {"Fn::Select": ["2", {"Ref": "TargetAZs"}]}, "-public"]
              ]
            }
          }
        ]
      }
    },
    "SubnetAz3Private": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "CidrBlock": {"Fn::FindInMap": ["SubnetConfig", "AZ3-Private", "CIDR"]},
        "AvailabilityZone": {"Fn::Select": ["2", {"Ref": "TargetAZs"}]}, "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {
              "Fn::Join": [
                "", [{"Ref": "EnvName"}, "-", {"Fn::Select": ["2", {"Ref": "TargetAZs"}]}, "-private"]
              ]
            }
          }
        ]
      }
    },
    "InternetGateway": {
      "Type": "AWS::EC2::InternetGateway",
      "Properties": {
        "Tags": [
          {
            "Key": "Name", "Value": "Dev-Internet_Gateway"
          }
        ]
      }
    },
    "RouteTableInternal": {
      "Type": "AWS::EC2::RouteTable",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name", "Value": "Dev-Internal-RouteTable"
          }
        ]
      }
    },
    "RouteTablePublic": {
      "Type": "AWS::EC2::RouteTable",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name", "Value": "Dev-Public-RouteTable"
          }
        ]
      }
    },
    "GwAttachmentInternetGateway": {
      "Type": "AWS::EC2::VPCGatewayAttachment",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "InternetGatewayId": {"Ref": "InternetGateway"}
      }
    }, "RouteTableAssocAz1Private": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "RouteTableInternal"},
        "SubnetId": {"Ref": "SubnetAz1Private"}
      }
    },
    "RouteTableAssocAz3Private": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "RouteTableInternal"},
        "SubnetId": {"Ref": "SubnetAz3Private"}
      }
    },
    "RouteTableAssocAz2Private": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "RouteTableInternal"},
        "SubnetId": {"Ref": "SubnetAz2Private"}
      }
    },
    "RouteTableAssocAz1Public": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "RouteTablePublic"},
        "SubnetId": {"Ref": "SubnetAz1Public"}
      }
    },
    "RouteTableAssocAz3Public": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "RouteTablePublic"},
        "SubnetId": {"Ref": "SubnetAz3Public"}
      }
    },
    "RouteTableAssocAz2Public": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "RouteTablePublic"},
        "SubnetId": {"Ref": "SubnetAz2Public"}
      }
    },
    "RouteTablePublicRoute1": {
      "Type": "AWS::EC2::Route",
      "Properties": {
        "DestinationCidrBlock": "0.0.0.0/0",
        "RouteTableId": {"Ref": "RouteTablePublic"},
        "GatewayId": {"Ref": "InternetGateway"}
      },
      "DependsOn": "GwAttachmentInternetGateway"
    }
  }
}