{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "MyApp VPC",
  "Parameters" : {
    "Project" : {
      "Description" : "Project name to tag resources with",
      "Type" : "String",
      "MinLength": "1",
      "MaxLength": "16",
      "AllowedPattern" : "[a-z]*",
      "ConstraintDescription" : "any alphabetic string (1-16) characters in length"
    },
    "Environment" : {
      "Description" : "Environment name to tag resources with",
      "Type" : "String",
      "AllowedValues" : [ "dev", "qa", "prod" ],
      "ConstraintDescription" : "must be one of dev, qa, or prod"
    },
    "SSHFrom": {
      "Description" : "Lockdown SSH access (default: can be accessed from anywhere)",
      "Type" : "String",
      "MinLength": "9",
      "MaxLength": "18",
      "Default" : "0.0.0.0/0",
      "AllowedPattern" : "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "ConstraintDescription" : "must be a valid CIDR range of the form x.x.x.x/x."
    },
    "VPCNetworkCIDR" : {
      "Description": "The CIDR block for the entire VPC network",
      "Type": "String",
      "AllowedPattern" : "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "Default": "10.114.0.0/16",
      "ConstraintDescription" : "must be an IPv4 dotted quad plus slash plus network bit length in CIDR format"
    },
    "VPCSubnet0CIDR" : {
      "Description": "The CIDR block for VPC subnet0 segment",
      "Type": "String",
      "AllowedPattern" : "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "Default": "10.114.0.0/24",
      "ConstraintDescription" : "must be an IPv4 dotted quad plus slash plus network bit length in CIDR format"
    },
    "VPCSubnet1CIDR" : {
      "Description": "The CIDR block for VPC subnet1 segment",
      "Type": "String",
      "AllowedPattern" : "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "Default": "10.114.1.0/24",
      "ConstraintDescription" : "must be an IPv4 dotted quad plus slash plus network bit length in CIDR format"
    },
    "VPCSubnet2CIDR" : {
      "Description": "The CIDR block for VPC subnet2 segment",
      "Type": "String",
      "AllowedPattern" : "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "Default": "10.114.2.0/24",
      "ConstraintDescription" : "must be an IPv4 dotted quad plus slash plus network bit length in CIDR format"
    }
  },
  "Resources" : {
    "VPC" : {
      "Type" : "AWS::EC2::VPC",
      "Properties" : {
        "EnableDnsSupport" : "true",
        "EnableDnsHostnames" : "true",
        "CidrBlock" : { "Ref": "VPCNetworkCIDR" },
        "Tags" : [
          { "Key" : "Name", "Value" : { "Fn::Join": [ "-", [ "vpc", { "Ref": "Project" }, { "Ref" : "Environment" } ] ] } },
          { "Key" : "Project", "Value" : { "Ref": "Project" } },
          { "Key" : "Environment", "Value" : { "Ref": "Environment" } }
        ]
      }
    },
    "VPCSubnet0" : {
      "Type" : "AWS::EC2::Subnet",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "AvailabilityZone": { "Fn::Select" : [ 0, { "Fn::GetAZs" : "" } ] },
        "CidrBlock" : { "Ref": "VPCSubnet0CIDR" },
        "Tags" : [
          { "Key" : "Name", "Value" : { "Fn::Join": [ "-", [ "subnet", { "Ref": "Project" }, { "Ref": "Environment" } ] ] } },
          { "Key" : "AZ", "Value" : { "Fn::Select" : [ 0, { "Fn::GetAZs" : "" } ] } },
          { "Key" : "Project", "Value" : { "Ref": "Project" } },
          { "Key" : "Environment", "Value" : { "Ref": "Environment" } }
        ]
      }
    },
    "VPCSubnet1" : {
      "Type" : "AWS::EC2::Subnet",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "AvailabilityZone": { "Fn::Select" : [ 1, { "Fn::GetAZs" : "" } ] },
        "CidrBlock" : { "Ref": "VPCSubnet1CIDR" },
        "Tags" : [
          { "Key" : "Name", "Value" : { "Fn::Join": [ "-", [ "subnet", { "Ref": "Project" }, { "Ref": "Environment" } ] ] } },
          { "Key" : "AZ", "Value" : { "Fn::Select" : [ 1, { "Fn::GetAZs" : "" } ] } },
          { "Key" : "Project", "Value" : { "Ref": "Project" } },
          { "Key" : "Environment", "Value" : { "Ref": "Environment" } }
        ]
      }
    },
    "VPCSubnet2" : {
      "Type" : "AWS::EC2::Subnet",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "AvailabilityZone": { "Fn::Select" : [ 2, { "Fn::GetAZs" : "" } ] },
        "CidrBlock" : { "Ref": "VPCSubnet2CIDR" },
        "Tags" : [
          { "Key" : "Name", "Value" : { "Fn::Join": [ "-", [ "subnet", { "Ref": "Project" }, { "Ref": "Environment" } ] ] } },
          { "Key" : "AZ", "Value" : { "Fn::Select" : [ 2, { "Fn::GetAZs" : "" } ] } },
          { "Key" : "Project", "Value" : { "Ref": "Project" } },
          { "Key" : "Environment", "Value" : { "Ref": "Environment" } }
        ]
      }
    },
    "InternetGateway" : {
      "Type" : "AWS::EC2::InternetGateway",
      "Properties" : {
        "Tags" : [
          { "Key" : "Name", "Value" : { "Fn::Join": [ "-", [ "igw", { "Ref": "Project" }, { "Ref": "Environment" } ] ] } },
          { "Key" : "Project", "Value" : { "Ref": "Project" } },
          { "Key" : "Environment", "Value" : { "Ref": "Environment" } }
        ]
      }
    },
    "GatewayToInternet" : {
       "Type" : "AWS::EC2::VPCGatewayAttachment",
       "Properties" : {
         "VpcId" : { "Ref" : "VPC" },
         "InternetGatewayId" : { "Ref" : "InternetGateway" }
       }
    },
    "PublicRouteTable" : {
      "Type" : "AWS::EC2::RouteTable",
      "DependsOn" : "GatewayToInternet",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "Tags" : [
          { "Key" : "Name", "Value" : { "Fn::Join": [ "-", [ "route", { "Ref": "Project" }, { "Ref" : "Environment" } ] ] } },
          { "Key" : "Project", "Value" : { "Ref": "Project" } },
          { "Key" : "Environment", "Value" : { "Ref": "Environment" } }
        ]
      }
    },
    "PublicRoute" : {
      "Type" : "AWS::EC2::Route",
      "DependsOn" : "GatewayToInternet",
      "Properties" : {
        "RouteTableId" : { "Ref" : "PublicRouteTable" },
        "DestinationCidrBlock" : "0.0.0.0/0",
        "GatewayId" : { "Ref" : "InternetGateway" }
      }
    },
    "VPCSubnet0RouteTableAssociation" : {
      "Type" : "AWS::EC2::SubnetRouteTableAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "VPCSubnet0" },
        "RouteTableId" : { "Ref" : "PublicRouteTable" }
      }
    },
    "VPCSubnet1RouteTableAssociation" : {
      "Type" : "AWS::EC2::SubnetRouteTableAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "VPCSubnet1" },
        "RouteTableId" : { "Ref" : "PublicRouteTable" }
      }
    },
    "VPCSubnet2RouteTableAssociation" : {
      "Type" : "AWS::EC2::SubnetRouteTableAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "VPCSubnet2" },
        "RouteTableId" : { "Ref" : "PublicRouteTable" }
      }
    },
    "InstanceRole": {
      "Type": "AWS::IAM::Role",
      "Properties": {
        "AssumeRolePolicyDocument": {
          "Version": "2012-10-17",
          "Statement": [
            {
              "Effect": "Allow",
              "Principal": {
                "Service": [ "ec2.amazonaws.com" ]
              },
              "Action": [ "sts:AssumeRole" ]
            }
          ]
        },
        "Path": "/",
        "Policies": [
          {
            "PolicyName": "ApplicationPolicy",
            "PolicyDocument": {
              "Version": "2012-10-17",
              "Statement": [
                {
                  "Effect": "Allow",
                  "Action": [
                    "elasticbeanstalk:*",
                    "elastiCache:*",
                    "ec2:*",
                    "elasticloadbalancing:*",
                    "autoscaling:*",
                    "cloudwatch:*",
                    "dynamodb:*",
                    "s3:*",
                    "sns:*",
                    "sqs:*",
                    "cloudformation:*",
                    "rds:*",
                    "iam:AddRoleToInstanceProfile",
                    "iam:CreateInstanceProfile",
                    "iam:CreateRole",
                    "iam:PassRole",
                    "iam:ListInstanceProfiles"
                  ],
                  "Resource": "*"
                }
              ]
            }
          }
        ]
      }
    },
    "InstanceProfile": {
       "Type": "AWS::IAM::InstanceProfile",
       "Properties": {
          "Path": "/",
          "Roles": [ { "Ref": "InstanceRole" } ]
       }
    },
    "VPCSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : { "Fn::Join": [ "", [ "VPC Security Group for ", { "Fn::Join": [ "-", [ { "Ref": "Project" }, { "Ref": "Environment" } ] ] } ] ] },
        "SecurityGroupIngress" : [
          {"IpProtocol": "tcp", "FromPort" : "22",  "ToPort" : "22",  "CidrIp" : { "Ref" : "SSHFrom" }},
          {"IpProtocol": "tcp", "FromPort": "80", "ToPort": "80", "CidrIp": "0.0.0.0/0" },
          {"IpProtocol": "tcp", "FromPort": "443", "ToPort": "443", "CidrIp": "0.0.0.0/0" }
        ],
        "VpcId" : { "Ref" : "VPC" },
        "Tags" : [
          { "Key" : "Name", "Value" : { "Fn::Join": [ "-", [ "sg", { "Ref": "Project" }, { "Ref" : "Environment" } ] ] } },
          { "Key" : "Project", "Value" : { "Ref": "Project" } },
          { "Key" : "Environment", "Value" : { "Ref": "Environment" } }
        ]
      }
    },
    "VPCSGIngress": {
      "Type": "AWS::EC2::SecurityGroupIngress",
      "Properties": {
        "GroupId": { "Ref" : "VPCSecurityGroup" },
        "IpProtocol": "-1",
        "FromPort": "0",
        "ToPort": "65535",
        "SourceSecurityGroupId": { "Ref": "VPCSecurityGroup" }
      }
    }
  },
  "Outputs" : {
    "VpcId" : {
      "Description" : "VPC Id",
      "Value" :  { "Ref" : "VPC" }
    },
    "VPCDefaultNetworkAcl" : {
      "Description" : "VPC",
      "Value" :  { "Fn::GetAtt" : ["VPC", "DefaultNetworkAcl"] }
    },
    "VPCDefaultSecurityGroup" : {
      "Description" : "VPC Default Security Group that we blissfully ignore thanks to self-referencing bugs",
      "Value" :  { "Fn::GetAtt" : ["VPC", "DefaultSecurityGroup"] }
    },
    "VPCSecurityGroup" : {
      "Description" : "VPC Security Group created by this stack",
      "Value" :  { "Ref": "VPCSecurityGroup" }
    },
    "VPCSubnet0": {
      "Description": "The subnet id for VPCSubnet0",
      "Value": {
        "Ref": "VPCSubnet0"
      }
    },
    "VPCSubnet1": {
      "Description": "The subnet id for VPCSubnet1",
      "Value": {
        "Ref": "VPCSubnet1"
      }
    },
    "VPCSubnet2": {
      "Description": "The subnet id for VPCSubnet2",
      "Value": {
        "Ref": "VPCSubnet2"
      }
    }
  }
}