Understanding Terraform Resources

A resource in Terraform represents a component of your infrastructure, such as a physical server, a virtual machine, a DNS record, or an S3 bucket. Resources have attributes that define their properties and behaviors, such as the size and location of a virtual machine or the domain name of a DNS record.
When you define a resource in Terraform, you specify the type of resource, a unique name for the resource, and the attributes that define the resource. Terraform uses the resource block to define resources in your Terraform configuration.

Task 1: Create a security group

Create a folder terraform-webserver and enter into it

mkdir terraform-webserver && cd terraform-webserver

create a file terraform.tf and write the code

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 5.0"
    }
  }
}

Now we should install awscli and setup aws configure to configure this you can use this script.

#!/bin/bash

sudo apt install unzip
curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install
aws --version

aws configure

AWS Access Key ID [None]: <your access key>

AWS Secret Access Key [None]: <your Secret Access Key>

create a file providers.tf and write the code

provider "aws" {
    region = "us-east-1"
}

To create a keypair we need to generate a key using this commands

    # come back to your repository
    cd
    cd .ssh
    ssh-keygen
    <your keyname>
    ls
    pwd
    cd

create a file keypair.tf and wite the code

resource "aws_key_pair" "terrakey" {
  key_name   = "terrakey"
  public_key = file("/home/ubuntu/.ssh/terrakey.pub")
}

create a file security-group.tf and write this code

resource "aws_security_group" "web_server" {
   name_prefix = "web-server-sg"

   ingress {
     from_port   = 80
     to_port     = 80
     protocol    = "tcp"
     cidr_blocks = ["0.0.0.0/0"]
   }

   ingress {
     from_port   = 443
     to_port     = 443
     protocol    = "tcp"
     cidr_blocks = ["0.0.0.0/0"]
   }

   ingress {
     from_port   = 22
     to_port     = 22
     protocol    = "tcp"
     cidr_blocks = ["0.0.0.0/0"]
   }

   egress {
     from_port        = 0
     to_port          = 0
     protocol         = "-1"
     cidr_blocks      = ["0.0.0.0/0"]
     ipv6_cidr_blocks = ["::/0"]
   }

 }

Now create a file main.tf and write this code

resource "aws_instance" "web_server" {
    ami           = "<your ami-id>"
    instance_type = "t2.micro"
    key_name      = "<your key name creted in the instance>"
    subnet_id     = "<your subnet-id>"
    security_groups = [
        aws_security_group.web_server.id
    ]
    associate_public_ip_address = true

    user_data = <<-EOF
        #!/bin/bash
        sudo apt update
        sudo apt install -y apache2
        sudo systemctl start apache2
        sudo systemctl enable apache2
        echo "<html><body><h1>Welcome to DevOpsParthu community!</h1></body></html>" > /var/www/html/index.html
    EOF

    tags = {
        Name = "web_server"
    }
}

Run terraform init to initialize the Terraform project

terraform init

Run terraform apply to create the security group.

terraform apply

Task 2: Create an EC2 instance

Now your EC2 instance will create with Terraform.

Task 3: Access your website

Open a web browser and enter the public IP or DNS name of your EC2 instance.
You should see your website's content displayed in your browser.

Day 65 - Working with Terraform Resources 🚀

Understanding Terraform Resources

Task 1: Create a security group

Task 2: Create an EC2 instance

Task 3: Access your website

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Pooja Bhavani

Pooja Bhavani