Q: A container is consuming 100% CPU. How do you limit it without restarting?
docker update --cpus="1.5" <container> — limit to 1.5 CPU cores. Also --memory="512m" for memory limit. For Kubernetes, update the resour...
#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
docker update --cpus="1.5" — limit to 1.5 CPU cores. Also --memory="512m" for memory limit. For Kubernetes, update the resource limits in the pod spec and trigger a rolling restart.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: docker update --cpus="1.5" — limit to 1.5 CPU cores. Also --memory="512m" for memory limit. For Kubernetes, update the resource l."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: docker update --cpus="1.5" — limit to 1.5 CPU cores. Also --memory="512m" for memory limit. Fo
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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