Common Web Stack with ALB

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "Common Web Stack with ALB",
  "Parameters" : {
    "Env": {
      "Type": "String"
    },
    "VPCID": {
      "Type": "AWS::EC2::VPC::Id"
    },
    "Subnets": {
      "Type": "List<AWS::EC2::Subnet::Id>"
    },
    "KeyPair": {
      "Type": "AWS::EC2::KeyPair::KeyName"
    },
    "AMIID": {
      "Description": "Input Amazon Linux Image ID",
      "Type": "AWS::EC2::Image::Id"
    }
  },
  "Resources" : {
    "ALBSG" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "-",
        "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"
          }
        ],
        "Tags" : [
          {"Key": "Name", "Value": { "Fn::Join" : [ "", [{ "Ref": "Env" }, "-ALBSG"]]} }
        ],
        "VpcId" : { "Ref": "VPCID" }
      }
    },
    "AppSG" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "-",
        "SecurityGroupIngress" : [ 
          {
            "IpProtocol" : "tcp",
            "FromPort" : "80",
            "ToPort" : "80",
            "SourceSecurityGroupId" : { "Ref" : "ALBSG" }
          }
        ],
        "Tags" : [
          {"Key": "Name", "Value": { "Fn::Join" : [ "", [{ "Ref": "Env" }, "-AppSG"]]} }
        ],
        "VpcId" : { "Ref": "VPCID" }
      }
    },
    "Instance01": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "ImageId": { "Ref": "AMIID" },
        "InstanceType": "t2.micro",
        "KeyName": { "Ref": "KeyPair" },
        "SecurityGroupIds" : [ { "Ref": "AppSG" } ],
        "SubnetId" : { "Fn::Select" : [ "0", { "Ref": "Subnets" }]},
        "Tags": [
          {"Key": "Name", "Value": { "Fn::Join" : [ "", [{ "Ref": "Env" }, "-Instance01"]]} }
        ],
        "Tenancy" : "default",
        "UserData" : { "Fn::Base64" : { "Fn::Join" : [ "", [
          "#! /bin/bash -v\n",
          "yum install -y httpd\n",
          "curl -s http://169.254.169.254/latest/meta-data/instance-id >> /var/www/html/index.html\n",
          "service httpd start\n"
        ]]}}
      }
    },
    "Instance02": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "ImageId": { "Ref": "AMIID" },
        "InstanceType": "t2.micro",
        "KeyName": { "Ref": "KeyPair" },
        "SecurityGroupIds" : [ { "Ref": "AppSG" } ],
        "SubnetId" : { "Fn::Select" : [ "0", { "Ref": "Subnets" }]},
        "Tags": [
          {"Key": "Name", "Value": { "Fn::Join" : [ "", [{ "Ref": "Env" }, "-Instance02"]]} }
        ],
        "Tenancy" : "default",
        "UserData" : { "Fn::Base64" : { "Fn::Join" : [ "", [
          "#! /bin/bash -v\n",
          "yum install -y httpd\n",
          "curl -s http://169.254.169.254/latest/meta-data/instance-id >> /var/www/html/index.html\n",
          "service httpd start\n"
        ]]}}
      }
    },
    "ALBTarget" : {
      "Type" : "AWS::ElasticLoadBalancingV2::TargetGroup",
      "Properties" : {
        "HealthCheckIntervalSeconds" : "30",
        "HealthCheckPath" : "/index.html",
        "HealthCheckPort" : "traffic-port",
        "HealthCheckProtocol" : "HTTP",
        "HealthCheckTimeoutSeconds" : "5",
        "HealthyThresholdCount" : "5",
        "Matcher" : { "HttpCode" : "200" },
        "Name" : { "Fn::Join" : [ "", [{ "Ref": "Env" }, "-ALBTarget"]]},
        "Port" : "80",
        "Protocol" : "HTTP",
        "Tags" : [
          {"Key": "Name", "Value": { "Fn::Join" : [ "", [{ "Ref": "Env" }, "-ALBTarget"]]} }
        ],
        "TargetGroupAttributes" : [
          { "Key" : "deregistration_delay.timeout_seconds", "Value" : "300" },
          { "Key" : "stickiness.enabled", "Value" : "false" },
          { "Key" : "stickiness.type", "Value" : "lb_cookie" },
          { "Key" : "stickiness.lb_cookie.duration_seconds", "Value" : "86400" }
        ],
        "Targets" : [
          { "Id" : { "Ref" : "Instance01" }, "Port" : "80" },
          { "Id" : { "Ref" : "Instance02" }, "Port" : "80" }
        ],
        "UnhealthyThresholdCount" : "2",
        "VpcId" : { "Ref": "VPCID" }
      }
    },
    "ALB" : {
      "Type" : "AWS::ElasticLoadBalancingV2::LoadBalancer",
      "Properties" : {
        "LoadBalancerAttributes" : [
          { "Key" : "access_logs.s3.enabled", "Value" : "false" },
          { "Key" : "deletion_protection.enabled", "Value" : "false" },
          { "Key" : "idle_timeout.timeout_seconds", "Value" : "60" }
        ],
        "Name" : { "Fn::Join" : [ "", [{ "Ref": "Env" }, "-ALB"]]},
        "Scheme" : "internet-facing",
        "SecurityGroups" : [
          { "Ref": "ALBSG" }
        ],
        "Subnets" : { "Ref": "Subnets" },
        "Tags" : [
          {"Key": "Name", "Value": { "Fn::Join" : [ "", [{ "Ref": "Env" }, "-ALB"]]} }
        ]
      }
    },
    "ALBListener" : {
      "Type" : "AWS::ElasticLoadBalancingV2::Listener",
      "Properties" : {
        "DefaultActions" : [{
          "TargetGroupArn" : { "Ref" : "ALBTarget" },
          "Type" : "forward"
        }],
        "LoadBalancerArn" : { "Ref" : "ALB" },
        "Port" : "80",
        "Protocol" : "HTTP"
      }
    }
  },
  "Outputs" : {
    "CheckURL" : {
      "Value" : { "Fn::Join" : [ "", [ "http://", { "Fn::GetAtt" : [ "ALB", "DNSName" ]}, "/index.html"]]}
    }
  }
}