ec2.template

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

  "Description" : "make an instance, based on region, ami, subnet, and security group",

  "Parameters" : {

    "KeyName" : {
      "Description" : "Name of and existing EC2 KeyPair to enable SSH access to the instance",
      "Type" : "String"
    },

    "VpcId" : {
      "Type" : "String",
      "Description" : "VpcId of your existing Virtual Private Cloud (VPC)"
    },

    "SubnetId" : {
      "Type" : "String",
      "Description" : "SubnetId of an existing subnet in your Virtual Private Cloud (VPC)"
    },

    "AmiId" : {
      "Type" : "String",
      "Description" : "AMI You want to use"
      
    },

    "SecurityGroupId": {
      "Type" : "String",
      "Description" : "SecurityGroup to use"
    }

  },

  "Resources" : {

    "Ec2Instance" : {
      "Type" : "AWS::EC2::Instance",
      "Properties" : {
        "ImageId" : { "Ref" : "AmiId" },
        "SecurityGroupIds" : [{ "Ref" : "SecurityGroupId" }],
        "SubnetId" : { "Ref" : "SubnetId" },
        "KeyName" : { "Ref" : "KeyName" },
        "UserData" : { "Fn::Base64" : { "Fn::Join" : ["", [
          "#!/bin/bash -v\n",
          "curl http://chef-brentozar.s3.amazonaws.com/bootstrap.sh -o /tmp/bootstrap.sh\n",
          "bash /tmp/bootstrap.sh\n",
          "# If all went well, signal success\n",
          "cfn-signal -e $? -r 'Chef Server configuration'\n"
          ]]}}
      }
    }
  },

  "Outputs" : {
    "InstanceId" : {
      "Value" : { "Ref" : "Ec2Instance" },
      "Description" : "Instance Id of newly created instance"
    },

    "Subnet" : {
      "Value" : { "Ref" : "SubnetId" },
      "Description" : "Subnet of instance"
    },

    "SecurityGroupId" : {
      "Value" : { "Ref" : "SecurityGroupId" },
      "Description" : "Security Group of instance"
    }
  }

}