Hello! We are a writer team from Definer Inc. In this issue, you are wondering about the use of Infrastructure as Code in AWS. Let's take a look at the actual screens and resources to explain in detail.

This article is about using the Cloudformation technology for the purpose of "managing cloud resources in code". It summarizes information and practices that can be helpful when you want to use Cloudformation to manage AWS resources Infrastructure as Code (IaC) in IT.

Infrastructure as Code (IaC) is the creation and management of infrastructure and its configuration in code. Instead of the traditional method of manually creating resources on the AWS console, infrastructure settings are put into code and resource creation is performed automatically. Using IaC is expected to reduce human error and increase development speed because it is coded. AWS has an IaC service called Cloudformation (Cfn). Cloudformation allows resources to be described in yaml or json format, and there is a 1:1 correspondence between the Cloudformation unit called a stack and the described resources.

We will create a VPC using Cloudformation as soon as possible. Below is a description of the VPC in json format.   It is hard to comment out.

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "definer-vpc-test",
  "Resources": {
    "VPC": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": "172.16.0.0/16",
        "EnableDnsSupport": true,
        "EnableDnsHostnames": true,
        "Tags": [
          {
            "Key": "Name",
            "Value": "definer-test"
          }
        ]
      }
    }
  }
}                

 

Then, I described the same VPC as above in yaml.
Since comments can be written, visibility seems to be higher than json.

# Comment

AWSTemplateFormatVersion: "2010-09-09"
Description: definer-vpc-test
Resources:
  VPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 172.16.0.0/16
      EnableDnsSupport: true
      EnableDnsHostnames: true
      Tags:
      - Key: Name
        Value: definer-test                  

Finally, let's create a VPC using this template. ① Log in to AWS and go to the Cloudformation screen. ② Click "Create Stack" -> "Use New Resource (Standard)" to move to the stack creation details screen. ③ Select "Upload Template File" and upload the yaml file or json file you have just created. ④ Enter an arbitrary stack name. The other items can be left as default. ⑤ Press "Create Stack" to start VPC creation.   After the stack creation is complete, a look at the list of VPCs on the VPC screen confirms that a VPC has indeed been created!

What is Infrastructure as Code? Explanation of Purpose, Benefits, and Cautions ... What is Infrastructure as Code (IaC)? What tools should we use? How ... Advantages and Disadvantages of Infrastructure as Code｜Automation of IT ... AWS CloudFormation（Modeling resources using templates and ...

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This article provides useful introductory information free of charge. For consultation and inquiries, please contact "Definer Inc".

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