🔹 1. AWS CLI Authentication

Before using Terraform, AWS CLI must be set up.
I used the following command:

aws configure

This asked for:

• AWS Access Key

• AWS Secret Key

• Default Region (ap-south-1 for me)

• Output Format (json)

Once done, I verified the login using:

aws sts get-caller-identity

If the credentials are correct, AWS returns:

• Account ID

• User ARN

• AWS IAM Identity

This means the CLI is authenticated successfully.

aws configure
video : https://youtu.be/dZgLNL869YU?si=9VnhOkd82Xs4lesd

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🔹 2. Creating an S3 Bucket (Hands-on)

In Day 03 video, the main focus was on creating a sample S3 bucket.

I practiced using both AWS CLI and Terraform.

S3 Bucket via AWS CLI

aws s3api create-bucket \
  --bucket nazeer-terraform-day03 \
  --region ap-south-1 \
  --create-bucket-configuration LocationConstraint=ap-south-1

This instantly created the bucket.

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🔹 3. Creating S3 Bucket via Terraform (Concept Review)

Although I already built this in Day 01, today’s focus was understanding how Terraform interacts with AWS once CLI credentials are configured.

Sample Terraform resource:

resource "aws_s3_bucket" "demo" {
  bucket = "nazeer-terraform-day03"
}

Run:

terraform init
terraform plan
terraform apply

Now Terraform talks to AWS securely because AWS CLI is configured.

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🔹 4. What I Understood Today

• Terraform needs AWS CLI configuration before creating resources

• S3 bucket creation is one of the simplest and most common demos

• Using both CLI and Terraform helps understand how AWS APIs work

• The flow for Terraform & AWS is straightforward:

•     AWS CLI Configure → Terraform Init → Plan → Apply
  

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📺 Day 03 Video (Embed Here Later)

https://youtu.be/09HQ_R1P7Lw?si=UM7eZCUy2m9KwtKs

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🧠 My Day 03 Takeaways

• AWS CLI configuration is an essential step before using Terraform

• Creating resources manually (CLI) helps understand what Terraform automates

• S3 bucket creation is the best beginner-friendly demo

• Feeling more confident as the basics are now clear

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🔚 End

Day 03 was simple, practical, and important for building a strong foundation.
Excited for Day 04! 🚀

#30DaysOfAWSTerraform #AWS #Terraform #DevOps #Cloud