Q: How do you roll back to a previous Docker image version in Kubernetes?
Update the image tag in the deployment to the previous version's tag. kubectl set image deployment/app container=registry/app:v1.2.3. Or ...
#Docker #Docker #L2 #Containers #Linux
🎙️ Candidate Opening & Architectural Context
""During an image optimization initiative across our services, we solved this exact problem. 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
Production Solution & Architecture
Update the image tag in the deployment to the previous version's tag. kubectl set image deployment/app container=registry/app:v1.2.3. Or kubectl rollout undo deployment/app if using Deployment rollout history.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: Update the image tag in the deployment to the previous version's tag. kubectl set image deployment/app container=registry/app:v1.2."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: Update the image tag in the deployment to the previous version's tag. kubectl set image deploym
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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