Q: How do you implement a drift detection system for your Terraform-managed infrastructure?
Run terraform plan on a schedule in CI. If plan shows unexpected changes (someone edited the console), alert via Slack/PagerDuty. Set up ...
#Terraform #Use VPC ID from another module #L3 #IaC #Cloud Infrastructure #Drift Detection
🎙️ Candidate Opening & Architectural Context
""In our enterprise Terraform repository, we designed reusable modules and remote backends to prevent this exact issue. When addressing this question, I walk the interviewer through our production incident runbook: isolating the blast radius, checking diagnostic logs and metrics, and applying a safe fix.""
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🛠️ Production Runbook & Step-by-Step Resolution
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Production Solution & Architecture
Run terraform plan on a schedule in CI. If plan shows unexpected changes (someone edited the console), alert via Slack/PagerDuty. Set up a dedicated "drift detection" pipeline separate from the apply pipeline. Never auto-apply drift corrections — investigate first.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: Run terraform plan on a schedule in CI. If plan shows unexpected changes (someone edited the console), alert via Slack/PagerDuty. ."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: Run terraform plan on a schedule in CI. If plan shows unexpected changes (someone edited the co
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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