Observed Signal · Jun 19, 2026 · Technical Guide · Source: DEV Community · Impact: 2/5 · Sentiment: Positive
Production-grade 3-tier AWS architecture with Terraform
A Dev.to author publishes a detailed walkthrough and full GitHub repo (vatul16/terratier) that provisions a production-minded, modular Terraform stack for a small Go/Node.js app on AWS. The design uses a four-tier VPC (public, frontend private, backend private, database isolated) across two Availability Zones, two ALBs (public and internal), RDS Postgres, Secrets Manager for credentials, and SSM alongside a bastion host. The post explains trade-offs: an internal ALB for stable backend scaling, Secrets Manager usage vs. environment variables, a single-NAT cost/availability option, robust user-data with retry loops, layered health checks, and observability endpoints. The author lists next steps (CI/CD, move to ECR, remote Terraform state) and includes the full Terraform source, module docs, and an architecture diagram on GitHub.
Practical, modular Terraform patterns and AWS design trade-offs are useful to cloud/platform engineers building production infrastructure, but the article is a technical how‑to rather than industry‑shifting news.
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Key Takeaways & Evidence Grounding
- Source code and architecture diagram published at GitHub repository https://github.com/vatul16/terratier
- TerraTier app is a Go/Node.js CRUD goals app deployed on AWS using modular Terraform
- VPC split into four subnet tiers (public, frontend private, backend private, database isolated) across two Availability Zones
- Two ALBs are used: a public ALB for frontend traffic and an internal ALB for backend traffic
- AWS Secrets Manager stores RDS credentials; instances use an IAM role scoped to GetSecretValue/DescribeSecret
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