Production ready terraform configruation for AWS

Project Overview: Terraform Multi-Environment Infrastructure

Core Components

1. Environment Management

• Separate configurations for dev, staging, and prod
• Environment-specific variables
• Isolated state files
• Different resource sizes per environment

2. Module System

• Common Module: Shared resources and IAM configurations
• EC2 Module: Instance and security group management
• S3 Module: Storage bucket with security features
• VPC Module: Network infrastructure and routing

Environment Specifications

Development (dev)

• Resource Sizing: t2.micro instances
• Network: 10.0.0.0/16 CIDR
• Purpose: Feature development and testing
• Minimal resource allocation
• More permissive security

Staging

• Resource Sizing: t2.small instances
• Network: 10.1.0.0/16 CIDR
• Purpose: Pre-production testing
• Production-like configuration
• Similar security to production

Production (prod)

• Resource Sizing: t2.medium instances
• Network: 10.2.0.0/16 CIDR
• Purpose: Live workloads
• Maximum resource allocation
• Strict security measures
• Remote state management

Key Features

1. Infrastructure Components

• VPC with public/private subnets
• EC2 instances for web and application servers
• S3 buckets for storage
• IAM roles and policies

2. Security Measures

• Network isolation
• Security groups
• IAM role-based access
• Encryption at rest
• Public access blocking

3. Scalability

• Environment-specific sizing
• Expandable CIDR ranges
• Modular design
• Resource customization

Deployment Workflow

1. Initial Setup

cd environments/<env>
terraform init

2. Configuration Review

terraform plan

3. Resource Creation

terraform apply

4. Resource Destruction

terraform destroy

5. Resource Destruction auto approve

NOTE: Resource Destruction Auto-Approve is NOT recommended in production environments.

terraform destroy --auto-approve

6. Specific resource Resource Destruction

We do this using the -target flag provided by resource type and name of the resource.

terraform destroy -target=RESOURCE_TYPE.RESOURCE_NAME

7. Environment Management

• Independent state files
• Separate variable sets
• Environment-specific tags

Best Practices Implemented

1. Code Organization

• Modular structure
• DRY (Don't Repeat Yourself) principles
• Clear separation of concerns
• Environment isolation

2. Security

• Least privilege principle
• Network segmentation
• Resource isolation
• Access controls
• Encryption

3. Maintainability

• Consistent naming
• Clear documentation
• Version control
• State management

Resource Management

1. State Files

• Environment separation
• Remote backend (prod)
• State locking
• Backup management

2. Variables

• Environment-specific values
• Consistent naming
• Clear documentation
• Default values

3. Outputs

• Resource identifiers
• Network information
• Access details