Q: Your Docker image is 2GB. How do you reduce it?
Multi-stage build (build artifact in fat builder image, copy only artifact to slim runtime). Use alpine-based images. Clean up package ma...
#Docker #Docker #L2 #Containers #Linux
🎙️ Candidate Opening & Architectural Context
""Container stability relies on clean signal handling (SIGTERM vs SIGKILL) and immutable image tagging. 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
Multi-stage build (build artifact in fat builder image, copy only artifact to slim runtime). Use alpine-based images. Clean up package manager cache in the same RUN layer. Remove build tools and test files. Use .dockerignore. Check with docker history or dive to find large layers.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: Multi-stage build (build artifact in fat builder image, copy only artifact to slim runtime). Use alpine-based images. Clean up pac."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: Multi-stage build (build artifact in fat builder image, copy only artifact to slim runtime). Us
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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