Interview › Infrastructure as Code (Terraform, Ansible)
What is the difference between terraform destroy and removing a resource from code?
Infrastructure as Code (Terraform, Ansible) · Intermediate level
Answer
terraform destroy plans deletion for all resources managed by the current state. Removing a resource from code usually plans to destroy that specific resource because Terraform thinks it is no longer desired. If the goal is to stop managing without deleting, use a removed block with destroy=false or a state removal workflow, with approvals.
Technical explanation
Removing code means 'this should no longer exist' unless you explicitly remove state ownership without destruction.
Destroying an entire workspace is a high-risk operation and should require strong approval.
Decommissioning should include backups, dependency checks, and post-destroy verification.
Keep Terraform's ownership boundary clear: one state should own a resource or field, and other tools should consume published outputs instead of modifying it.
Use fmt, validate, linting, policy checks, plan review, and state locking before production applies.
Design for small blast radius by splitting state around lifecycle, permissions, and recovery boundaries.
Hands-on example
1. Build a safe IaC delivery workflow for: What is the difference between terraform destroy and removing a resource from code?
2. Pull request job:
terraform fmt -check
terraform init -backend=false
terraform validate
tflint --recursive
checkov -d .
terraform init
terraform plan -out=tfplan
terraform show -json tfplan > tfplan.json
3. Policy job evaluates plan JSON for public exposure, missing encryption, IAM wildcards, and destructive changes.
4. Apply job runs only after approval, uses remote state locking, short-lived cloud credentials, and applies the saved plan artifact.
5. For failures, rerun plan, inspect state and cloud objects, and fix root cause before any state surgery.
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