Deploy AWS Cloudformation Template Using AWS CLI | Create Virtual Private Cloud , Internet Gateway & Associate

🌟Launch Internet Gateway & Associate🌟

Here we will launch new InternetGateway resource and attach it to VPC so that it can communicate via Internet.

🔳 Parameters:-
✦ CustomVPC :- Using this parameter for VPC “AWS::EC2::VPC::Id” we can list existing VPC list into the account and select anyone from them. Apart from this list we can also you default value if no value is selected in the parameter.
✦ CustomInternetGateway :- Using this parameter for Internet gateway with type “String” we are setting default value for this parameter.
🔳 Resources
✦ CustomInternetGateway :- This resource helps us allocate an internet gateway[IGW] for use with a Virtual private cloud. Post Internet gateway creation, we can attach it to a Virtual private cloud. Tags:- Tags to set naming based on the tagging policy defined.
✦ AttachGateway :- This resource helps us attach an internet gateway, or a virtual private gateway to a our custom VPC, which enables connectivity between the internet and VPC.
As part of VPCGatewayAttachment property we will define.
➖ VpcId :- The one we have selected in parameter “CustomVPC” , we will refer it using “!Ref CustomVPC”.
➖ InternetGatewayId:- We will refer it using “!Ref CustomInternetGateway”, here we are referring from our previously created resource CustomInternetGateway.
🔳 Outputs: Its always a best practice to print output for your resources.
✦ outputCustomInternetGateway: A reference to the created Internet gateway.
✦ outputAttachGateway: A reference to the created attach gateway resource.

Parameters:
  CustomVPC:
    Description: Select One VPC available in your existing account
    Type: AWS::EC2::VPC::Id
    Default: <Default VPC ID>
Resources:
  CustomInternetGateway:
    Type: AWS::EC2::InternetGateway
    Properties:
      Tags:
        - Key: Name
          Value: VPC_internet_Gateway
  AttachGateway:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      VpcId: !Ref CustomVPC
      InternetGatewayId: !Ref CustomInternetGateway
Outputs:
  outputCustomInternetGateway:
    Description: A reference to the created Internet gateway
    Value: !Ref CustomInternetGateway
  outputAttachGateway:
    Description: A reference to the created attach gateway resource
    Value: !Ref AttachGateway

🔊 To view entire github code click here

1️⃣ Lets validate our template 👨‍💻

aws cloudformation validate-template --template-body file://<file path>

2️⃣ After successfull template verification lets create stack using our template 👨‍💻

aws cloudformation create-stack --stack-name launchandattachinternetgateway --template-body file://<file path>

Note:- If you are not providing default vpc id in parameter then you will have to use below command

aws cloudformation create-stack --stack-name launchandattachinternetgateway --template-body file://<file path> --parameters ParameterKey=CustomVPC,ParameterValue=<VPC ID>

3️⃣ Check if the stack we created via template is completed successfully 👨‍💻

aws cloudformation list-stack-resources --stack-name launchandattachinternetgateway

4️⃣ Describe stack and its resources to view its properties 👨‍💻

aws cloudformation describe-stacks --stack-name launchandattachinternetgateway

aws cloudformation describe-stack-resources --stack-name launchandattachinternetgateway

5️⃣ Check events for stack formation 👨‍💻

aws cloudformation describe-stack-events --stack-name launchandattachinternetgateway

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