IaC Templates

AWS infrastructure templates: CloudFormation learning basics and Terraform basics plus portfolio scenarios.

Portfolio scenarios are validated with terraform fmt / terraform validate only. They are not deployed to AWS in this repository’s default workflow.

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Repository structure

iac-templates/
├── cloudformation/
│   └── basics/
│       ├── tasks/                 # Progressive CFN exercises
│       └── others/                # Extra CFN examples
└── terraform/
    ├── basics/                    # Progressive TF exercises (01–07)
    ├── modules/                   # vpc, iam, s3, rds, alb, asg
    ├── business-growth/
    │   ├── level-1-startup/       # Implemented
    │   ├── level-2-growth/        # Implemented
    │   ├── level-3-ecs/           # Roadmap
    │   └── level-3-eks/           # Roadmap
    └── deployment-strategies/
        ├── README.md              # Blue-green vs canary vs A/B
        ├── blue-green/            # Implemented
        ├── canary/                # Roadmap
        └── ab-testing/            # Roadmap

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Scenario status

Scenario	What it demonstrates	Status
terraform/basics/*	Progressive TF exercises (VPC, EC2, S3, ALB, ASG, RDS)	Implemented (learning)
cloudformation/basics/*	Progressive CFN exercises	Implemented (learning)
business-growth/level-1-startup	VPC, SSM EC2, single-AZ RDS, S3, least-privilege IAM	Implemented
business-growth/level-2-growth	ALB + ASG (CPU tracking), NAT, Multi-AZ RDS + replica, CloudWatch	Implemented
business-growth/level-3-ecs	ECS Fargate, Aurora Serverless v2, SQS/EventBridge	Roadmap
business-growth/level-3-eks	EKS	Roadmap
deployment-strategies/blue-green	Dual ASG (for_each) + ALB weighted forward cutover	Implemented
deployment-strategies/canary	Gradual traffic shift	Roadmap
deployment-strategies/ab-testing	Rule-based traffic split	Roadmap

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Validate portfolio scenarios (offline)

Requires Terraform >= 1.11. No AWS credentials needed for validate.

# From repo root — repeat per Implemented scenario directory:
cd terraform/business-growth/level-1-startup
terraform fmt -check -recursive
terraform init -backend=false
terraform validate

cd ../level-2-growth
terraform init -backend=false
terraform validate

cd ../../deployment-strategies/blue-green
terraform init -backend=false
terraform validate

Defaults: region eu-west-1; AMI and AZs are variables (no data sources) so validation works offline. Copy terraform.tfvars.example before any real plan/apply.

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CloudFormation (basics)

aws cloudformation create-stack \
  --stack-name my-stack \
  --template-body file://cloudformation/basics/tasks/template01.yml \
  --parameters ParameterKey=CrearInstancia,ParameterValue=true

CFN concept	Templates
Parameters + AllowedValues	All
Conditions	01, 02, 03, 05, 06
Rules	01
Mappings	02, 04, 05, 06
ALB + ASG	03
NAT + Peering	04
RDS Multi-AZ	05
S3 lifecycle	06

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Terraform basics

cd terraform/basics/01-test
terraform init
terraform plan

Terraform concept	Basics
provider / modules	All
VPC, subnets, IGW	All
EC2	01–03, 05, 07
S3	04
ALB	05
ASG	06
RDS	07

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Learning templates and portfolio scenarios. Review AMI IDs, bucket names, regions, and costs before any real deploy.