What are implicit dependencies in Terraform?

Refs like `aws_vpc.main.id` auto-wire the graph. No code needed. Parallel where possible.

When should I use explicit depends_on in Terraform?

Hidden links—provisioners, data sources sans refs, module side-effects. Forces order, no questions.

How do I visualize Terraform dependencies?

`terraform graph | dot -Tpng > graph.png`. See the DAG arrows tell all.

Terraform Dependencies: Implicit Magic or Explicit Must-Have?

Terraform promises smooth sailing, but dependency snags sink ships. This lab pits implicit refs against explicit depends_on—guess which wins in the clutch.

DevTools Feed Apr 03, 2026 3 min read

Terraform dependency graph showing implicit and explicit arrows between AWS resources

⚡ Key Takeaways

Implicit deps via references build the graph automatically—but miss hidden ones. 𝕏
Explicit depends_on essential for provisioners and non-ref links. 𝕏
Always graph it: terraform graph reveals the real order. 𝕏

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