Terraform

When to Use

• Provisioning: Creating VPCs, Databases, K8s Clusters.
• Multi-Cloud: Learn one syntax (HCL), use it for AWS, Azure, GCP, Datadog, etc.
• State Management: It tracks resource state, allowing "Plan" (preview) and "Apply".

Quick Start

# main.tf
provider "aws" {
  region = "us-west-2"
}

resource "aws_s3_bucket" "b" {
  bucket = "my-tf-test-bucket"
  tags = {
    Name = "My bucket"
  }
}

Core Concepts

Providers

State

terraform.tfstate

Stacks (2025)

Best Practices (2025)

• Use Remote State: S3 backend or Terraform Cloud. Never local state.
• Use Modules: DRY. Write a "Company Standard Bucket" module and reuse it.
• Use

  tfsec

  /

  trivy

  : Scan HCL for misconfigurations (open security groups) before deploy.

• Don't hardcode secrets: Use

  variable "db_password" {}

  and pass it via

  TF_VAR_

  or a secret manager.

References

• Terraform Documentation