AWS Template CloudFormation for VPC

MultitierVPC

{
  "AWSTemplateFormatVersion" : "2010-09-09",

  "Description" : "AWS CloudFormation Template multi-tier-web-app-in-vpc. It will create a multi-tier web applications in a VPC with multiple subnets. The first subnet is public and contains and internet facing load balancer, a NAT device for internet access from the private subnet and a bastion host to allow SSH access to the hosts in the private subnet. The second subnet is private and contains a Frontend fleet Security Group for EC2 instances",

  "Parameters" : {

    "KeyName": {
      "Description" : "Name of an existing EC2 KeyPair to enable SSH access to the instances",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "255",
      "AllowedPattern" : "[\\x20-\\x7E]*",
      "ConstraintDescription" : "can contain only ASCII characters."
    },

    "SSHLocation" : {
      "Description" : "Lockdown SSH access to the bastion host (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."
    },

    "BastionInstanceType" : {
      "Description" : "Bastion Host EC2 instance type",
      "Type" : "String",
      "Default" : "m1.small",
      "AllowedValues" : [ "t1.micro","m1.small","m1.medium","m1.large","m1.xlarge","m2.xlarge","m2.2xlarge","m2.4xlarge","m3.xlarge","m3.2xlarge","c1.medium","c1.xlarge","cc1.4xlarge","cc2.8xlarge","cg1.4xlarge"],
      "ConstraintDescription" : "must be a valid EC2 instance type."
    },

    "NATInstanceType" : {
      "Description" : "NET Device EC2 instance type",
      "Type" : "String",
      "Default" : "m1.small",
      "AllowedValues" : [ "t1.micro","m1.small","m1.medium","m1.large","m1.xlarge","m2.xlarge","m2.2xlarge","m2.4xlarge","m3.xlarge","m3.2xlarge","c1.medium","c1.xlarge","cc1.4xlarge","cc2.8xlarge","cg1.4xlarge"],
      "ConstraintDescription" : "must be a valid EC2 instance type."
    }
  },

  "Mappings" : {
    "AWSNATAMI" : {
      "us-east-1"      : { "AMI" : "ami-c6699baf" },
      "us-west-2"      : { "AMI" : "ami-52ff7262" },
      "us-west-1"      : { "AMI" : "ami-3bcc9e7e" },
      "eu-west-1"      : { "AMI" : "ami-0b5b6c7f" },
      "ap-southeast-1" : { "AMI" : "ami-02eb9350" },
      "ap-southeast-2" : { "AMI" : "ami-ab990e91" },
      "ap-northeast-1" : { "AMI" : "ami-14d86d15" },
      "sa-east-1"      : { "AMI" : "ami-0439e619" }
    },

    "AWSInstanceType2Arch" : {
      "t1.micro"    : { "Arch" : "64" },
      "m1.small"    : { "Arch" : "64" },
      "m1.medium"   : { "Arch" : "64" },
      "m1.large"    : { "Arch" : "64" },
      "m1.xlarge"   : { "Arch" : "64" },
      "m2.xlarge"   : { "Arch" : "64" },
      "m2.2xlarge"  : { "Arch" : "64" },
      "m2.4xlarge"  : { "Arch" : "64" },
      "m3.xlarge"   : { "Arch" : "64" },
      "m3.2xlarge"  : { "Arch" : "64" },
      "c1.medium"   : { "Arch" : "64" },
      "c1.xlarge"   : { "Arch" : "64" },
      "cc1.4xlarge" : { "Arch" : "64Cluster" },
      "cc2.8xlarge" : { "Arch" : "64Cluster" },
      "cg1.4xlarge" : { "Arch" : "64GPU" }
    },

    "AWSRegionArch2AMI" : {
      "us-east-1"      : { "32" : "ami-a0cd60c9", "64" : "ami-aecd60c7", "64Cluster" : "ami-a8cd60c1",      "64GPU" : "ami-eccf6285" },
      "us-west-2"      : { "32" : "ami-46da5576", "64" : "ami-48da5578", "64Cluster" : "NOT_YET_SUPPORTED", "64GPU" : "NOT_YET_SUPPORTED" },
      "us-west-1"      : { "32" : "ami-7d4c6938", "64" : "ami-734c6936", "64Cluster" : "NOT_YET_SUPPORTED", "64GPU" : "NOT_YET_SUPPORTED" },
      "eu-west-1"      : { "32" : "ami-61555115", "64" : "ami-6d555119", "64Cluster" : "ami-67555113",      "64GPU" : "NOT_YET_SUPPORTED" },
      "ap-southeast-1" : { "32" : "ami-220b4a70", "64" : "ami-3c0b4a6e", "64Cluster" : "NOT_YET_SUPPORTED", "64GPU" : "NOT_YET_SUPPORTED" },
      "ap-southeast-2" : { "32" : "ami-b3990e89", "64" : "ami-bd990e87", "64Cluster" : "NOT_YET_SUPPORTED", "64GPU" : "NOT_YET_SUPPORTED" },
      "ap-northeast-1" : { "32" : "ami-2a19aa2b", "64" : "ami-2819aa29", "64Cluster" : "NOT_YET_SUPPORTED", "64GPU" : "NOT_YET_SUPPORTED" },
      "sa-east-1"      : { "32" : "ami-f836e8e5", "64" : "ami-fe36e8e3", "64Cluster" : "NOT_YET_SUPPORTED", "64GPU" : "NOT_YET_SUPPORTED" }
    },

    "SubnetConfig" : {
      "VPC"     : { "CIDR" : "10.0.0.0/16" },
      "Public"  : { "CIDR" : "10.0.0.0/24" },
      "Private" : { "CIDR" : "10.0.1.0/24" }
    }
  },

  "Resources" : {


    "VPC" : {
      "Type" : "AWS::EC2::VPC",
      "Properties" : {
        "CidrBlock" : { "Fn::FindInMap" : [ "SubnetConfig", "VPC", "CIDR" ]},
        "Tags" : [
          { "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } },
          { "Key" : "Network", "Value" : "Public" }
        ]
      }
    },

    "PublicSubnet" : {
      "Type" : "AWS::EC2::Subnet",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "CidrBlock" : { "Fn::FindInMap" : [ "SubnetConfig", "Public", "CIDR" ]},
        "Tags" : [
          { "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } },
          { "Key" : "Network", "Value" : "Public" }
        ]
      }
    },

    "InternetGateway" : {
      "Type" : "AWS::EC2::InternetGateway",
      "Properties" : {
        "Tags" : [
          { "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } },
          { "Key" : "Network", "Value" : "Public" }
        ]
      }
    },

    "GatewayToInternet" : {
       "Type" : "AWS::EC2::VPCGatewayAttachment",
       "Properties" : {
         "VpcId" : { "Ref" : "VPC" },
         "InternetGatewayId" : { "Ref" : "InternetGateway" }
       }
    },

    "PublicRouteTable" : {
      "Type" : "AWS::EC2::RouteTable",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "Tags" : [
          { "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } },
          { "Key" : "Network", "Value" : "Public" }
        ]
      }
    },

    "PublicRoute" : {
      "Type" : "AWS::EC2::Route",
      "DependsOn" : "GatewayToInternet",
      "Properties" : {
        "RouteTableId" : { "Ref" : "PublicRouteTable" },
        "DestinationCidrBlock" : "0.0.0.0/0",
        "GatewayId" : { "Ref" : "InternetGateway" }
      }
    },

    "PublicSubnetRouteTableAssociation" : {
      "Type" : "AWS::EC2::SubnetRouteTableAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "PublicSubnet" },
        "RouteTableId" : { "Ref" : "PublicRouteTable" }
      }
    },

    "PublicNetworkAcl" : {
      "Type" : "AWS::EC2::NetworkAcl",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "Tags" : [
          { "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } },
          { "Key" : "Network", "Value" : "Public" }
        ]
      }
    },

    "InboundHTTPPublicNetworkAclEntry" : {
      "Type" : "AWS::EC2::NetworkAclEntry",
      "Properties" : {
        "NetworkAclId" : { "Ref" : "PublicNetworkAcl" },
        "RuleNumber" : "100",
        "Protocol" : "6",
        "RuleAction" : "allow",
        "Egress" : "false",
        "CidrBlock" : "0.0.0.0/0",
        "PortRange" : { "From" : "80", "To" : "80" }
      }
    },

    "InboundHTTPSPublicNetworkAclEntry" : {
      "Type" : "AWS::EC2::NetworkAclEntry",
      "Properties" : {
        "NetworkAclId" : { "Ref" : "PublicNetworkAcl" },
        "RuleNumber" : "101",
        "Protocol" : "6",
        "RuleAction" : "allow",
        "Egress" : "false",
        "CidrBlock" : "0.0.0.0/0",
        "PortRange" : { "From" : "443", "To" : "443" }
      }
    },

    "InboundSSHPublicNetworkAclEntry" : {
      "Type" : "AWS::EC2::NetworkAclEntry",
      "Properties" : {
        "NetworkAclId" : { "Ref" : "PublicNetworkAcl" },
        "RuleNumber" : "102",
        "Protocol" : "6",
        "RuleAction" : "allow",
        "Egress" : "false",
        "CidrBlock" : { "Ref" : "SSHLocation" },
        "PortRange" : { "From" : "22", "To" : "22" }
      }
    },

    "InboundEmphemeralPublicNetworkAclEntry" : {
      "Type" : "AWS::EC2::NetworkAclEntry",
      "Properties" : {
        "NetworkAclId" : { "Ref" : "PublicNetworkAcl" },
        "RuleNumber" : "103",
        "Protocol" : "6",
        "RuleAction" : "allow",
        "Egress" : "false",
        "CidrBlock" : "0.0.0.0/0",
        "PortRange" : { "From" : "1024", "To" : "65535" }
      }
    },

    "OutboundPublicNetworkAclEntry" : {
      "Type" : "AWS::EC2::NetworkAclEntry",
      "Properties" : {
        "NetworkAclId" : { "Ref" : "PublicNetworkAcl" },
        "RuleNumber" : "100",
        "Protocol" : "6",
        "RuleAction" : "allow",
        "Egress" : "true",
        "CidrBlock" : "0.0.0.0/0",
        "PortRange" : { "From" : "0", "To" : "65535" }
      }
    },

    "PublicSubnetNetworkAclAssociation" : {
      "Type" : "AWS::EC2::SubnetNetworkAclAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "PublicSubnet" },
        "NetworkAclId" : { "Ref" : "PublicNetworkAcl" }
      }
    },

    "PrivateSubnet" : {
      "Type" : "AWS::EC2::Subnet",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "CidrBlock" : { "Fn::FindInMap" : [ "SubnetConfig", "Private", "CIDR" ]},
        "Tags" : [
          { "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } },
          { "Key" : "Network", "Value" : "Private" }
        ]
      }
    },

    "PrivateRouteTable" : {
      "Type" : "AWS::EC2::RouteTable",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "Tags" : [
          { "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } },
          { "Key" : "Network", "Value" : "Private" }
        ]
      }
    },

    "PrivateSubnetRouteTableAssociation" : {
      "Type" : "AWS::EC2::SubnetRouteTableAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "PrivateSubnet" },
        "RouteTableId" : { "Ref" : "PrivateRouteTable" }
      }
    },

    "PrivateRoute" : {
      "Type" : "AWS::EC2::Route",
      "Properties" : {
        "RouteTableId" : { "Ref" : "PrivateRouteTable" },
        "DestinationCidrBlock" : "0.0.0.0/0",
        "InstanceId" : { "Ref" : "NATDevice" }
      }
    },

    "PrivateNetworkAcl" : {
      "Type" : "AWS::EC2::NetworkAcl",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "Tags" : [
          { "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } },
          { "Key" : "Network", "Value" : "Private" }
        ]
      }
    },

    "InboundPrivateNetworkAclEntry" : {
      "Type" : "AWS::EC2::NetworkAclEntry",
      "Properties" : {
        "NetworkAclId" : { "Ref" : "PrivateNetworkAcl" },
        "RuleNumber" : "100",
        "Protocol" : "6",
        "RuleAction" : "allow",
        "Egress" : "false",
        "CidrBlock" : "0.0.0.0/0",
        "PortRange" : { "From" : "0", "To" : "65535" }
      }
    },

    "OutBoundPrivateNetworkAclEntry" : {
      "Type" : "AWS::EC2::NetworkAclEntry",
      "Properties" : {
        "NetworkAclId" : { "Ref" : "PrivateNetworkAcl" },
        "RuleNumber" : "100",
        "Protocol" : "6",
        "RuleAction" : "allow",
        "Egress" : "true",
        "CidrBlock" : "0.0.0.0/0",
        "PortRange" : { "From" : "0", "To" : "65535" }
      }
    },

    "PrivateSubnetNetworkAclAssociation" : {
      "Type" : "AWS::EC2::SubnetNetworkAclAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "PrivateSubnet" },
        "NetworkAclId" : { "Ref" : "PrivateNetworkAcl" }
      }
    },

    "NATIPAddress" : {
      "Type" : "AWS::EC2::EIP",
      "DependsOn" : "GatewayToInternet",
      "Properties" : {
        "Domain" : "vpc",
        "InstanceId" : { "Ref" : "NATDevice" }
      }
    },

    "NATDevice" : {
      "Type" : "AWS::EC2::Instance",
      "Properties" : {
        "InstanceType" : { "Ref" : "NATInstanceType" },
        "KeyName" : { "Ref" : "KeyName" },
        "SubnetId" : { "Ref" : "PublicSubnet" },
        "SourceDestCheck" : "false",
        "ImageId" : { "Fn::FindInMap" : [ "AWSNATAMI", { "Ref" : "AWS::Region" }, "AMI" ]},
        "SecurityGroupIds" : [{ "Ref" : "NATSecurityGroup" }]
      }
    },

    "NATSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "Enable internal access to the NAT device",
        "VpcId" : { "Ref" : "VPC" },
        "SecurityGroupIngress" : [
           { "IpProtocol" : "tcp", "FromPort" : "80",  "ToPort" : "80",  "CidrIp" : "0.0.0.0/0"} ,
           { "IpProtocol" : "tcp", "FromPort" : "443", "ToPort" : "443", "CidrIp" : "0.0.0.0/0"} ,
           { "IpProtocol" : "tcp", "FromPort" : "22",  "ToPort" : "22",  "CidrIp" : { "Ref" : "SSHLocation" }} ],
        "SecurityGroupEgress" : [
           { "IpProtocol" : "tcp", "FromPort" : "80",  "ToPort" : "80",  "CidrIp" : "0.0.0.0/0"} ,
           { "IpProtocol" : "tcp", "FromPort" : "443", "ToPort" : "443", "CidrIp" : "0.0.0.0/0"} ]
      }
    },

    "BastionIPAddress" : {
      "Type" : "AWS::EC2::EIP",
      "DependsOn" : "GatewayToInternet",
      "Properties" : {
        "Domain" : "vpc",
        "InstanceId" : { "Ref" : "BastionHost" }
      }
    },

    "BastionHost" : {
      "Type" : "AWS::EC2::Instance",
      "Properties" : {
        "InstanceType" : { "Ref" : "BastionInstanceType" },
        "KeyName"  : { "Ref" : "KeyName" },
        "SubnetId" : { "Ref" : "PublicSubnet" },
        "ImageId"  : { "Fn::FindInMap" : [ "AWSRegionArch2AMI", { "Ref" : "AWS::Region" }, { "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "BastionInstanceType" }, "Arch" ] } ] },
        "SecurityGroupIds" : [{ "Ref" : "BastionSecurityGroup" }]
      }
    },

    "BastionSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "Enable access to the Bastion host",
        "VpcId" : { "Ref" : "VPC" },
        "SecurityGroupIngress" : [ { "IpProtocol" : "tcp", "FromPort" : "22",  "ToPort" : "22",  "CidrIp" : { "Ref" : "SSHLocation" }} ],
        "SecurityGroupEgress"  : [ { "IpProtocol" : "tcp", "FromPort" : "22",  "ToPort" : "22",  "CidrIp" : { "Fn::FindInMap" : [ "SubnetConfig", "Private", "CIDR" ]}}]
      }
    },

    "PublicElasticLoadBalancer" : {
      "Type" : "AWS::ElasticLoadBalancing::LoadBalancer",
      "Properties" : {
        "SecurityGroups" : [ { "Ref" : "PublicLoadBalancerSecurityGroup" } ],
        "Subnets" : [ { "Ref" : "PublicSubnet" } ],
        "Listeners" : [ { "LoadBalancerPort" : "80", "InstancePort" : "80", "Protocol" : "HTTP" } ],
        "HealthCheck" : {
          "Target" : "HTTP:80/",
          "HealthyThreshold" : "3",
          "UnhealthyThreshold" : "5",
          "Interval" : "90",
          "Timeout" : "60"
        }
      }
    },

    "PublicLoadBalancerSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "Public ELB Security Group with HTTP access on port 80 from the internet",
        "VpcId" : { "Ref" : "VPC" },
        "SecurityGroupIngress" : [ { "IpProtocol" : "tcp", "FromPort" : "80", "ToPort" : "80", "CidrIp" : "0.0.0.0/0"} ],
        "SecurityGroupEgress" : [ { "IpProtocol" : "tcp", "FromPort" : "80", "ToPort" : "80", "CidrIp" : "0.0.0.0/0"} ]
      }
    },

    "FrontendSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "Allow access from load balancer and bastion as well as outbound HTTP and HTTPS traffic",
        "VpcId" : { "Ref" : "VPC" },
        "SecurityGroupIngress" : [
          { "IpProtocol" : "tcp", "FromPort" : "80", "ToPort" : "80", "SourceSecurityGroupId" : { "Ref" : "PublicLoadBalancerSecurityGroup" } } ,
          { "IpProtocol" : "tcp", "FromPort" : "22", "ToPort" : "22", "SourceSecurityGroupId" : { "Ref" : "BastionSecurityGroup" } } ],
        "SecurityGroupEgress" : [
           { "IpProtocol" : "tcp", "FromPort" : "80",  "ToPort" : "80",  "CidrIp" : "0.0.0.0/0" } ,
           { "IpProtocol" : "tcp", "FromPort" : "443", "ToPort" : "443", "CidrIp" : "0.0.0.0/0" } ]
      }
    }
  },

  "Outputs" : {
    "NATDevice" : {
      "Description" : "Bastion",
      "Value" :  { "Ref" : "NATIPAddress"}
    },
    "Bastion" : {
      "Description" : "IP Address of the Bastion host",
      "Value" :  { "Ref" : "BastionIPAddress" }
    }
  }
}