CloudFormation template

{
  "Description": "Building on AWS VPC",
  "Mappings": {
    "AWSRegionToAMI": {
      "us-west-2": {
        "AMI": "ami-32cf7b4a"
      }
    }
  },
  "Resources": {
    "VPC": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": "10.1.0.0/16",
        "Tags": [
          {
            "Key": "Name",
            "Value": "edx-build-aws-vpc"
          }
        ]
      }
    },
    "InternetGateway": {
      "Type": "AWS::EC2::InternetGateway",
      "Properties": {
        "Tags": [
          {
            "Key": "Name",
            "Value": "edx-igw"
          }
        ]
      }
    },
    "AttachGateway": {
      "Type": "AWS::EC2::VPCGatewayAttachment",
      "Properties": {
        "VpcId": {
          "Ref": "VPC"
        },
        "InternetGatewayId": {
          "Ref": "InternetGateway"
        }
      }
    },
    "PublicSubnet1": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "CidrBlock": "10.1.1.0/24",
        "VpcId": {
          "Ref": "VPC"
        },
        "MapPublicIpOnLaunch": "true",
        "Tags": [
          {
            "Key": "Name",
            "Value": "edx-subnet-public-a"
          }
        ]
      }
    },
    "PublicSubnet2": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "1",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "CidrBlock": "10.1.2.0/24",
        "VpcId": {
          "Ref": "VPC"
        },
        "MapPublicIpOnLaunch": "true",
        "Tags": [
          {
            "Key": "Name",
            "Value": "edx-subnet-public-b"
          }
        ]
      }
    },
    "PublicRouteTable": {
      "Type": "AWS::EC2::RouteTable",
      "Properties": {
        "VpcId": {
          "Ref": "VPC"
        },
        "Tags": [
          {
            "Key": "Name",
            "Value": "edx-routetable-public"
          }
        ]
      }
    },
    "PublicDefaultRoute": {
      "Type": "AWS::EC2::Route",
      "DependsOn": "AttachGateway",
      "Properties": {
        "DestinationCidrBlock": "0.0.0.0/0",
        "GatewayId": {
          "Ref": "InternetGateway"
        },
        "RouteTableId": {
          "Ref": "PublicRouteTable"
        }
      }
    },
    "PublicRouteAssociation1": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {
          "Ref": "PublicRouteTable"
        },
        "SubnetId": {
          "Ref": "PublicSubnet1"
        }
      }
    },
    "PublicRouteAssociation2": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {
          "Ref": "PublicRouteTable"
        },
        "SubnetId": {
          "Ref": "PublicSubnet2"
        }
      }
    },
    "PrivateSubnet1": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "CidrBlock": "10.1.3.0/24",
        "VpcId": {
          "Ref": "VPC"
        },
        "Tags": [
          {
            "Key": "Name",
            "Value": "edx-subnet-private-a"
          }
        ]
      }
    },
    "PrivateSubnet2": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "1",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "CidrBlock": "10.1.4.0/24",
        "VpcId": {
          "Ref": "VPC"
        },
        "Tags": [
          {
            "Key": "Name",
            "Value": "edx-subnet-private-b"
          }
        ]
      }
    }
  },
  "Outputs": {
    "PublicSubnet1" : {
      "Description" : "Public Subnet 1",
      "Value" : { "Ref": "PublicSubnet1" }
    },
    "PublicSubnet2" : {
      "Description" : "Public Subnet 2",
      "Value" : { "Ref": "PublicSubnet2" }
    },
    "PrivateSubnet1" : {
      "Description" : "Private Subnet 1",
      "Value" : { "Ref": "PrivateSubnet1" }
    },
    "PrivateSubnet2" : {
      "Description" : "Private Subnet 2",
      "Value" : { "Ref": "PrivateSubnet2" }
    },
  }
}