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Terraform Drift Detection

08. 01. 2022 1 min read advanced

Cloud Advanced

Terraform Drift Detection

TerraformDriftReconciliationGitOps 5 min read

Drift detection, terraform plan -refresh-only, prevention and remediation.

What is Drift

Difference between desired vs actual state. Causes: manual changes, auto-scaling, other tooling.

Detection

terraform plan -refresh-only -detailed-exitcode
# Exit 0 = no drift, Exit 2 = drift detected

# Scheduled CI check
on:
  schedule:
    - cron: '0 8 * * 1-5'

Prevention

  • SCPs/Azure Policy — block manual changes
  • Read-only console — write only through CI/CD
  • lifecycle ignore_changes for auto-managed attributes

Summary

Drift is inevitable. Scheduled plans + policies + review = solution.

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CORE SYSTEMS tým

Stavíme core systémy a AI agenty, které drží provoz. 15 let zkušeností s enterprise IT.