chime/terraform-aws-alternat resource

Health v2 · maintenance only

Adoption not part of the score

1261 stars · 94 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Terraform module that deploys highly available NAT instances on AWS as a cost-effective alternative to NAT Gateways. It automates EC2-based NAT with automatic route recovery and failover across availability zones.

Use cases

• reduce AWS NAT Gateway data processing costs
• set up high availability NAT instances in a VPC
• replace NAT gateways with EC2 NAT instances via Terraform
• automatically recover NAT instance routes after failures
• cut egress networking costs for high-traffic private subnets

When to choose

• NAT Gateway data processing charges are a significant part of your AWS bill
• you want infrastructure-as-code, self-healing NAT instances across multiple AZs
• your traffic volumes are high enough that EC2 instances are cheaper than managed NAT

When to avoid

• you prefer a fully managed solution with no EC2 instances to maintain
• your traffic volume is low enough that NAT Gateway pricing is negligible
• you need NAT features like built-in high bandwidth or CloudWatch metrics without operational overhead

Facets

infra-config · maturity active

infrastructure-as-code networking cloud deployment cloud-computing infrastructure-as-code networking cloud nat-instance high-availability aws-vpc cost-optimization terraform-module ec2 devops terraform linux

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markdown · JSON · MCP: product_card(name="chime/terraform-aws-alternat")