# Terraform Code

We will start with writing terraform code in our local machine.

Before we begin I have uploaded the codes on the [Github Repository](https://github.com/rishawsingh/terraform-automate.git).

Following are the list of things we are going to add in our Terraform Code:

* First configure provider (i.e we have used AWS)
* Create resources for simplicity we have created EC2 instances, VPC, security groups and S3 bucket.
* Once the files are written they need to be validated using plan and apply command.

**Step 1**

**Create Provider.tf file.**

![](/files/pCLgVjSfRjR9yQhL6T6w)

````
```terraform
terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.0"
    }
  }
}

provider "aws" {
  access_key = "${var.aws_access_key}"
  secret_key = "${var.aws_secret_key}"
  region     = "us-east-1"
}

variable "aws_access_key" {}
variable "aws_secret_key" {}
```
````

**Step 2:**

**Create main.tf file**

![](/files/8SoVcVvym8N0IQc9w2d0)

````
```terraform
resource "aws_vpc" "my_vpc" {
  cidr_block = "10.0.0.0/16"
}



# Create the security group
resource "aws_security_group" "my_sg" {
  name_prefix = "my-sg"
  vpc_id      = aws_vpc.my_vpc.id

  # Allow incoming SSH traffic from anywhere
  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

# Create the EC2 instance
resource "aws_instance" "my_ec2" {
  ami           = "ami-00c39f71452c08778" 
  # Amazon Linux 2 AMI
  instance_type = "t2.micro"
}

# Create the S3 bucket
resource "aws_s3_bucket" "my_s3_bucket" {
  bucket = "rishaw-bucket-shaw"
}


output "ec2_public_ip" {
  value = aws_instance.my_ec2.public_ip
}
```
````

Once the files are created, you can initialize the working directory containing Terraform configuration files using the command:

```
terraform init
```

To see what changes will be made in the infrastructure, use the command:

```
terraform plan -var aws_access_key="YOUR ACCESS KEY" -var aws_secret_key="YOUR_SECREt_KEY"
```

After that we can simply make infrastructure changes using the command:

```
terraform apply -auto-approve aws_access_key="YOUR ACCESS KEY" -var aws_secret_key="YOUR_SECREt_KEY"
```

![](/files/1BO95KYs0QG1g5uYQh18)

Once the changes are made and you do not want the infrastructure up any longer you can destroy it using the command:

```
terraform destroy -auto-approve aws_access_key="YOUR ACCESS KEY" -var aws_secret_key="YOUR_SECREt_KEY"
```

 ![](/files/AO60cJvgacQT8HfA6mLW)


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