Terragrunt at Scale: Dependency Graphs, Circular Deps & OCI Versioning

Managing a Terragrunt dependency graph across 500+ modules without hitting circular dependencies or version drift is one of the hardest scaling problems in platform engineering. You'll learn: How to map and audit a large Terragrunt dependency graph using terragrunt graph-dependencies and DAG visualisation tools Patterns for structuring module hierarchies to prevent circular dependencies before they reach CI Enforcing module versioning with OCI registries — why OCI beats Git tags at this scale How to segment a 500+ module monorepo into dependency tiers so targeted runs stay fast Common failure modes: implicit dependencies, missing mock_outputs, and run-all ordering bugs Keywords: Terragrunt dependency graph, Terragrunt at scale, OCI module registry, circular dependencies Terraform, platform engineering IaC 🎧 Listen, then go deeper — DevOps & Cloud interview-prep ebooks at DevOpsInterview.Cloud