Q: How would you migrate a stateful workload from one Kubernetes cluster to another with minimal downtime?
1) Snapshot PVC data (Velero). 2) Deploy workload in new cluster from same Git source. 3) Restore data snapshot to new cluster PVCs. 4) T...
#Kubernetes #Advanced Scenarios #L3 #Container Orchestration #K8s #Git
🎙️ Candidate Opening & Architectural Context
""In one of our high-traffic production clusters, our SRE team handled this incident using a standardized runbook. 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
1) Snapshot PVC data (Velero). 2) Deploy workload in new cluster from same Git source. 3) Restore data snapshot to new cluster PVCs. 4) Test new cluster. 5) Switch DNS/load balancer to new cluster. 6) Decommission old cluster.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: 1) Snapshot PVC data (Velero). 2) Deploy workload in new cluster from same Git source. 3) Restore data snapshot to new cluster PVC."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: 1) Snapshot PVC data (Velero). 2) Deploy workload in new cluster from same Git source. 3) Resto
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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