tes.json

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

	"Description": "AWS CloudFormation Sample Template vpc_single_instance_in_subnet.template: Sample template showing how to create a VPC and add an EC2 instance with an Elastic IP address and a security group. **WARNING** This template creates an Amazon EC2 instance. You will be billed for the AWS resources used if you create a stack from this template.",

	"Parameters": {

		"InstanceType": {
			"Description": "WebServer EC2 instance type",
			"Type": "String",
			"Default": "m1.medium",
			"ConstraintDescription": "must be a valid EC2 instance type."
		},

		"KeyName": {
			"Description": "Name of an existing EC2 KeyPair to enable SSH access to the instance",
			"Type": "String",
			"Default": "dfad"

		},
		"ImageID": {
			"Description": "Name of an existing EC2 KeyPair to enable SSH access to the instance",
			"Type": "String",
			"Default": "ami-12345"

		},
		"InstanceSecurityGroup": {
			"Description": " The IP address range that can be used to SSH to the EC2 instances",
			"Type": "AWS::EC2::SecurityGroup::Id",
			"Default": "sg-12345"
		},
		"SubnetId": {
			"Description": " The IP address range that can be used to SSH to the EC2 instances",
			"Type": "AWS::EC2::Subnet::Id",
			"Default": "subnet-12345"
		}

	},
	"Resources": {
		"testInstance": {
			"Type": "AWS::EC2::Instance",
			"Properties": {
				"ImageId": {
					"Ref": "ImageID"
				},

				"SecurityGroupIds": [{
					"Ref": "InstanceSecurityGroup"
				}],
				"SubnetId": {
					"Ref": "SubnetId"
				},
				"InstanceType": {
					"Ref": "InstanceType"
				},
				"KeyName": {
					"Ref": "KeyName"
				},
				"UserData": {
					"Fn::Base64": {
						"Fn::Join": ["", [
							"#!/bin/bash -v\n",
                                                        "curl -o /tmp/bootchef.sh http://35.163.69.37/bootchef.sh\n",
                                                        "chmod +x /tmp/bootchef.sh\n",
                                                        "/bin/bash /tmp/bootchef.sh\n",
							"/opt/aws/bin/cfn-signal -e 0 -r \"ChefClient setup complete\" '", {
							"Ref": "WaitHandle"
							}, "'\n"

						]]
					}
				}
			}
		},
		"WaitHandle": {
			"Type": "AWS::CloudFormation::WaitConditionHandle"
		}
	}
}