terraform-application-auto-scaling

Terraform Application Auto Scaling

5 min 16 sec for provisioning on AWS after 'terraform apply' command

Status: Finished

Description • Pre-requisites • Solution Architecture • How it works • Tech Stack • Author • License

Description

This project consists of creating a structure in AWS for a auto scaling application. It is made up of the following components:

• VPC
• Internet Gateway
• Subnets
• Route Tables
• Security Groups
• Load Balancer
• Auto Scaling Group
• CloudWatch
• RDS

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Pre-requisites

Before you begin, you will need to have the following tools installed on your machine: [Terraform] (https://www.terraform.io/) and [Git] (https://git-scm.com). You will need to have a [AWS Account] (https://aws.amazon.com/). In addition, it is good to have an editor to work with the code like [VSCode] (https://code.visualstudio.com/).

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Solution Architecture

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How it works

1 - Clone this repository.

git clone git@github.com:diogofiaminghi/terraform-application-auto-scaling.git

2 - Open console AWS.

IMPORTANT: Make sure you are in "us-east-1" region

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• Go to EC2

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• Network & Security >> Key Pairs

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• Create Key Pair

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• Name = terraform-application-auto-scaling
• Key pair type = RSA
• Privete key format = .pem
• Click on "Create key pair"

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• The key is downloaded automatically

IMPORTANT: Copy the key to the same project directory (keep your key in a safe place and don't share it. You will use it to access the instances).

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• Change permission.

chmod 400 terraform-application-auto-scaling.pem

3 - Add the key-name in your .gitignore file.

4 - You must now configure your AWS Access Keys using the bash terminal.

export AWS_ACCESS_KEY_ID=XXXXXXXXXXXXXXXX

export AWS_SECRET_ACCESS_KEY=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

5 - Terraform Commands in Project Folder

terraform init

terraform fmt

terraform validate

terraform plan -out=plan.out

terraform apply plan.out

6 - Now, to prove that everything worked, we will test the Auto Scaling.

• AWS console >> EC2 >> Instances >> click on WEB instance >> monitoring >> CPU Utilization >> View in metrics >> periodo 10s >> auto-refresching 10s. Repit this for the second WEB instance in another browser tab.

• In another browser tab, open Auto Scaling Grou >> Activity >> Activity history

• In Load Balancer, copy the DNS name >> paste in another browser tab >> the html page must be loaded

• connect via ssh to both web instances

ssh -i "terraform-application-auto-scaling.pem" ubuntu@the-public-ip-here

sudo stress-ng --cpu 32 --timeout 600 --metrics-brief

• observe the number of instances being increased and decreased as stress rises and falls. The test will end in 10 minutes.

7 - Do not forget to destroy the provisioned structure otherwise you will be able to receive invoices.

terraform destroy

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Tech Stack

The following tools were used in the construction of the project:

• AWS
• Terraform
• VSCode
• Git
• GitHub

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Author

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License

This project is under the license MIT.

Made with love by Diogo Fiaminghi 👋🏽 Get in Touch!

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