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InfrastructureJanuary 2026
Reusable Terraform modules and infrastructure patterns
Well-designed modules reduce duplication and speed up provisioning - but poor modularisation leads to unexpected coupling.
Design principles
Keep modules small and opinionated, expose a minimal surface area, and version modules through a registry or git tags.
Prefer composition over inheritance: build higher-level stacks by composing smaller modules.
Safety and testing
Use `terraform validate` and `tflint` in CI. Apply infrastructure in ephemeral test accounts before promoting to production.
Document expected inputs and outputs to make reuse predictable across teams.