Terraform Projects

Terraform learning sprint documenting practical AWS Infrastructure as Code (IaC). Progresses from basic syntax to production-ready structure—perfect showcasing S3, EC2, remote state, variables, file organization, CloudFront, and more.

📋 Day-by-Day Tasks

Day	Focus	Key Learnings	Resources Created
01	Basic Syntax + S3	Providers, aws_s3_bucket, init/plan/apply	S3 bucket
02	Remote Backend	S3 backend setup, DynamoDB lock table, state migration	Remote state bucket
03	Variables + EC2	variables.tf, outputs.tf, tfvars, aws_instance, lock file	EC2 instance
04	File Structure	main.tf, outputs.tf, variables.tf, project layout	Complete project template
05	Meta-arguments	count and for_each resource iteration	Multiple S3 buckets
06	Lifecycle Meta	create_before_destroy, prevent_destroy, SSM data source	EC2 instance
07	Expressions	Conditional, dynamic blocks, splat expressions	EC2 instances, Security Group
08	Terraform Functions	String, math, collection, and file functions in locals	S3 bucket
09	Data Sources	Fetching existing VPC, subnets, and querying AMIs	EC2 instance
10	Static Website Project	CloudFront, OAC, S3 bucket policies, fileset function	S3 Website + CloudFront CDN
11	VPC Peering Demo	Multi-region providers, VPC peering, Route Tables, Aliases	VPCs, EC2s, Peering Connection
12	IAM & CSV Processing	csvdecode, for_each, complex data filtering (regex, can)	IAM Users, Profiles, Groups
13	Blue-Green Deployment	Elastic Beanstalk environments, CNAME Swapping, Zero-downtime deployment	Elastic Beanstalk App, Environments
14	Serverless Image Processing	Lambda functions, layers, S3 event notifications, IAM policies	S3 Buckets, Lambda
15	Terraform Provisioners	local-exec, remote-exec, file provisioners on EC2	EC2 instance, provisioner scripts
16	Production EKS Cluster	Custom modules, VPC tags, IAM roles, Managed Node Groups	EKS Cluster, VPC, IAM, Node Groups
17	Terraform IAM Policies and Governance	IAM roles, policies, attachments structure	IAM
18	2-Tier Application Architecture	Web server + RDS database, Security groups, Secrets Manager	VPC, EC2, RDS, Secrets
19	End-to-End observability project	CloudTrail, CloudWatch Logs, Metric Filters, SNS	S3, CloudTrail, CloudWatch, SNS

🚀 Quick Start (Any Day)

cd environments/day_01  # Pick your day
terraform init
terraform plan          # Preview changes
terraform apply         # Create (type 'yes')
terraform output        # View results
terraform destroy       # Cleanup (IMPORTANT!)

Prerequisites: AWS CLI configured, Terraform installed, Free Tier account.

🏗️ Repository Structure

terraform-learning/
├── README.md               # This file
├── environments/
│   ├── day_01/             # Basic S3 syntax, S3 bucket setup
│   ├── day_02/             # Remote state setup in S3 bucket
│   ├── day_03/             # EC2 + variables
│   ├── day_04/             # Complete file structure
│   ├── day_05/             # count and for_each meta-arguments
│   ├── day_06/             # lifecycle resource blocks
│   ├── day_07/             # Dynamic blocks and conditional expressions
│   ├── day_08/             # Built-in Terraform functions
│   ├── day_09/             # Data sources and querying AWS
│   ├── day_10/             # CloudFront + S3 Static Website project
│   ├── day_11/             # Multi-region VPC Peering Demo
│   ├── day_12/             # IAM users & groups scaling with CSV decode
│   ├── day_13/             # AWS Elastic Beanstalk Blue-Green Deployment
│   ├── day_14/             # Serverless Image Processing (S3 + Lambda)
│   ├── day_15/             # Terraform Provisioners (local-exec, remote-exec, file)
│   ├── day_16/             # Production EKS Cluster with Custom Modules
│   ├── day_17/             # Terraform IAM Policies and Governance
│   ├── day_18/             # 2-Tier AWS Architecture (Web + RDS)
│   └── day_19/             # End-to-End observability project
└── .gitignore              # Protects .terraform/, tfstate