Private Route Table

📦 Overview

This Terraform module provisions a private AWS Route Table within a specified VPC and associates it with one or more private subnets.

It’s designed for routing outbound traffic from internal AWS resources—like EC2 instances or backend services—via NAT Gateways or VPC endpoints, without exposing them directly to the internet.

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✅ Key Features

• Creates a route table scoped for private subnets
• Associates it with one or more private subnet IDs
• Adds standard environment-based tagging
• Modular and reusable across internal network tiers

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💼 Use Cases

• Routing backend traffic through NAT Gateways
• Supporting isolated compute layers in a 3-tier architecture
• Defining private communication paths within a VPC
• Setting up subnet-specific routing in microservice environments

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📥 Input Variables

Name	Type	Description
region	string	AWS region for the route table deployment
vpc_id	string	The ID of the VPC where the route table will be created
subnet_ids	list	List of subnet IDs to associate with the private route table
environment	string	Tag to specify the deployment environment (e.g., dev, prod, test)

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📤 Outputs

Name	Description
route_table_id	The ID of the created private route table

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🚀 Deployment Readiness

• ✅ Compatible with Terraform 1.0+
• ✅ Tested with AWS provider 5.x
• 🧪 Requires IAM permissions for VPC and Route Table management

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🛠️ Example Usage

module "route_table_private" {
  source      = "git::ssh://git@github.com/archiphire/aws-level-1-modules.git//network/route-table-private?ref=v1.0.0"

  region      = "us-east-1"
  vpc_id      = "vpc-0123456789abcdef0"
  subnet_ids  = ["subnet-abc123", "subnet-def456"]
  environment = "dev"
}

terraform init
terraform plan
terraform apply

or

tofu init
tofu plan
tofu apply

🧹 Cleanup Options

Terraform Destroy (for testing):

terraform destroy

or

tofu destroy

Manual Deletion (for production):

Delete via AWS Console or CLI only after verifying it’s not in use by critical subnets:

aws ec2 delete-route-table --route-table-id "route_table_id"

🛡️ Notes

This is a Level 1 module optimized for use with private subnets. To complete routing behavior, consider adding: aws_route resources that point to a NAT Gateway or VPC endpoint VPC flow logs or security group rules for internal visibility and protection

🔒 Deployment Package Notice

This module is part of the Level 1 AWS License Tier. To access the full deployment package and source code, subscribe to Archiphire.