Why do Terraform modules and application artifacts need different versioning disciplines?

Applications roll back by redeploying; modules cannot unapply state. The asymmetry that forces expand-contract discipline and plan-reviewed upgrades instead of promote-and-rollback pipelines.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

Applications roll back by redeploying; modules cannot unapply state. The asymmetry that forces expand-contract discipline and plan-reviewed upgrades instead of promote-and-rollback pipelines.

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Next in this trackYou are moving CI execution onto Kubernetes. Walk me through your isolation and cost decisions.Next in this trackSome teams ship daily while others board a release train each fortnight. How do you choose cadence per product area?Next in this trackDesign the pipeline that retrains and redeploys a model nightly. What makes it different from a normal CD pipeline?

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