Q: Infrastructure was created manually in the AWS console. Your team now wants to manage it with Terraform. How do you import it?
Use terraform import:
#Terraform #Import & Migrations #L2 #IaC #Cloud Infrastructure #Terraform State
🎙️ 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
1️⃣
Initial Diagnostics & Root Cause Analysis
Use terraform import:
- Write the Terraform resource configuration first (what the resource should look like in code).
- Import the resource into state:
- Run
terraform plan— it will show diffs between your config and the actual resource.
2️⃣
Remediation & Permanent Safeguards
For large-scale imports: Terraformer or tf-import can auto-generate Terraform code from existing AWS resources. New in Terraform 1.5: import blocks in configuration files — declarative import as code.
terraform import aws_instance.my_server i-1234567890abcdef0- Fix the config to match reality until
planshows no changes.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: Write the Terraform resource configuration first (what the resource should look like in code).."
⚡ 60-Second Elevator Pitch Talking Points
- Write the Terraform resource configuration first (what the resource should look like in code).
- Import the resource into state:
- Run terraform plan — it will show diffs between your config and the actual resource.
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