[AWS Lab] CloudFormation – VPC: Internet Gateway

In this lab, we will learn how to create an Internet Gateway and attach it to a VPC using CloudFormation.

• You need to check the AWS reference for details.
  • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-template-resource-type-ref.html
  • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-internetgateway.html
  • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpc-gateway-attachment.html
• Resource Type
  • AWS::EC2::InternetGateway
  • AWS::EC2::VPCGatewayAttachment

0. Create a custom VPC

Please refer to this document: CloudFormation – VPC

• Copy the VPC id

1. Create a Template File

• Please review the following YAML template file and save it “myigw.yaml”.

AWSTemplateFormatVersion: 2010-09-09 
Description: Create an Internet Gateway and attach it to a VPC
Parameters:
  MyVpcId:
    Type: AWS::EC2::VPC::Id
    Description: 'Id of an existing VPC'
Resources:
  MyIGW:
    Type: AWS::EC2::InternetGateway
    Properties:
      Tags:
      - Key: env
        Value: dev
      - Key: Name
        Value: MyIGW
  AttachIGW:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      VpcId:
        Ref: MyVpcId
      InternetGatewayId:
        Ref: MyIGW
Outputs:
  IGWId:
    Description: The Internet Gateway ID
    Value: !Ref MyIGW

2. CloudFormation – Create a Stack

• Click “Create stack”
  • Click “with new resources (standard)“
• Create Stack
  • Check “Template is ready“
  • Check “Upload a template file”
    • Choose “myigw.yaml“
  • Click “Next“
• Stack Details
  • Stack name: “IGW-Stack“
  • parameters
    • MyVpcId: Select the id of the vpc that you created earlier
  • Click “Next“
• Stack Options
  • Accept all defaults
  • Click “Next“
• Review
  • Click “Submit“

3. CloudFormation – Create Resources

• The stack is creating an Internet Gateway.
  • Wait until the process completes.
• Check the “Events” tab
• Check the “Outputs” tab
  • You can see the igw id.
• Check the “Resources” tab
  • Click the IGW id and check the properties

In the next part, we will create a route table.