setup_nodejs

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

  "Description" : "AWS CloudFormation to Setup NodeJS and run a fruit searching application. http://www.trailblazing.in/p/ohiodn8",

  "Parameters" : {

    "KeyName": {
      "Description" : "Existing EC2 KeyPair to enable SSH access to the instances",
      "Type": "AWS::EC2::KeyPair::KeyName",
      "ConstraintDescription" : "must be the name of an existing EC2 KeyPair."
    },
    
    "SubnetCIDR" : {
      "Description" : "SUBNET CIDR BLOCK e.g. 150.0.0.0/24",
      "Type" : "String",
      "Default" : "10.0.0.0/24"    
    },    
    
    "vpcCIDR" : {
      "Description" : "VPC CIDR BLOCK e.g. 150.0.0.0/16",
      "Type" : "String",
      "Default" : "10.0.0.0/16"    
    },    

    "InstanceType" : {
      "Description" : "WebServer EC2 instance type",
      "Type" : "String",
      "Default" : "t2.micro",
      "AllowedValues" : [ "t2.micro", "t2.small"]
,
      "ConstraintDescription" : "must be a valid EC2 instance type."
    },

    "SSHLocation": {
      "Description": "The IP address range that can be used to SSH to the EC2 instances: SG Inbound Rule",
      "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 IP CIDR range of the form x.x.x.x/x."
    }
  },

  "Mappings" : {
    "AWSInstanceType2Arch" : {
      "t2.micro"    : { "Arch" : "HVM64"  },
      "t2.small"     : { "Arch" : "HVM64"  }
    },

    "AWSInstanceType2NATArch" : {
      "t2.micro"    : { "Arch" : "NATHVM64"  },
      "t2.small"     : { "Arch" : "NATHVM64"  }
    }
,
    "AWSRegionArch2AMI" : {
      "us-east-1"        : {"HVM64" : "ami-0ac019f4fcb7cb7e6"},
      "us-east-2"        : {"HVM64" : "ami-0f65671a86f061fcd"},
      "us-west-2"        : {"HVM64" : "ami-0bbe6b35405ecebdb"},
      "us-west-1"        : {"HVM64" : "ami-063aa838bd7631e0b"}
    }

  },

  "Resources" : {
    "VPC" : {
      "Type" : "AWS::EC2::VPC",
      "Properties" : {
        "EnableDnsSupport" : "true",
        "EnableDnsHostnames" : "true",
        "CidrBlock" : { "Ref" : "vpcCIDR" }
      }
    },
    "PublicSubnet" : {
      "Type" : "AWS::EC2::Subnet",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" },
        "CidrBlock" : { "Ref" : "SubnetCIDR" }
      }
    },
    "InternetGateway" : {
      "Type" : "AWS::EC2::InternetGateway"
    },
    "VPCGatewayAttachment" : {
       "Type" : "AWS::EC2::VPCGatewayAttachment",
       "Properties" : {
         "VpcId" : { "Ref" : "VPC" },
         "InternetGatewayId" : { "Ref" : "InternetGateway" }
       }
    },
    "PublicRouteTable" : {
      "Type" : "AWS::EC2::RouteTable",
      "Properties" : {
        "VpcId" : { "Ref" : "VPC" }
      }
    },
    "PublicRoute" : {
      "Type" : "AWS::EC2::Route",
      "DependsOn" : "VPCGatewayAttachment",
      "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" }
      }
    },
    "PublicSubnetNetworkAclAssociation" : {
      "Type" : "AWS::EC2::SubnetNetworkAclAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "PublicSubnet" },
        "NetworkAclId" : { "Fn::GetAtt" : ["VPC", "DefaultNetworkAcl"] }
      }
    },  
    "WebServerSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "Enable HTTP access via port 80 locked down to the load balancer + SSH access",
        "VpcId" : { "Ref" : "VPC" },
        "SecurityGroupIngress" : [
          {"IpProtocol" : "tcp", "FromPort" : "80", "ToPort" : "80", "CidrIp" : "0.0.0.0/0"},
          {"IpProtocol" : "tcp", "FromPort" : "22", "ToPort" : "22", "CidrIp" : { "Ref" : "SSHLocation"}}
        ]
      }
    },      

    "WebServer": {
      "Type" : "AWS::EC2::Instance",
      "Properties": {
        "ImageId" : { "Fn::FindInMap" : [ "AWSRegionArch2AMI", { "Ref" : "AWS::Region" },
                          { "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "InstanceType" }, "Arch" ] } ] },
        "InstanceType"   : { "Ref" : "InstanceType" },
        "NetworkInterfaces" : [{
          "GroupSet"                 : [{"Ref": "WebServerSecurityGroup"}],
          "AssociatePublicIpAddress" : "true",
          "DeviceIndex"              : "0",
          "DeleteOnTermination"      : "true",
          "SubnetId"                 : {"Ref": "PublicSubnet"}
        }],
        "KeyName"        : { "Ref" : "KeyName" },
        "UserData" : { "Fn::Base64" : { "Fn::Join" : ["\n", [
                       "#!/bin/bash -xe",
                       "sudo apt-get update -y",
                       "sudo apt-get install -y git",
                       "wget -qO- https://deb.nodesource.com/setup_8.x | sudo -E bash -",
                       "sudo apt-get install -y nodejs",
                       "sudo apt-get install -y build-essential",
                       "cd /home/ubuntu && git clone https://github.com/ohiodn8/FruitApp.git",
                       "cd /home/ubuntu/FruitApp && sudo npm install",
                       "cd /home/ubuntu/FruitApp && sudo npm start"
        ]]}}
      }
    }
  },

  "Outputs" : {
    "WebsiteURL" : {
      "Value" : { "Fn::Join" : ["", ["http://", { "Fn::GetAtt" : [ "WebServer", "PublicDnsName" ]} ]]},
      "Description" : "NodeJS FruitApp Website"
    },
    "InstanceId" : {
      "Description" : "InstanceId of the newly created EC2 instance",
      "Value" : { "Ref" : "WebServer" }
    },
    "AZ" : {
      "Description" : "Availability Zone of the newly created EC2 instance",
      "Value" : { "Fn::GetAtt" : [ "WebServer", "AvailabilityZone" ] }
    },
    "PublicIP" : {
      "Description" : "Public IP address of the newly created EC2 instance",
      "Value" : { "Fn::GetAtt" : [ "WebServer", "PublicIp" ] }
    },
    "KeyName" : {
      "Description" : "KeyPair name to ssh into the instamce",
      "Value" : { "Ref" : "KeyName" }
    }    
  }
}