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Optimize a Node.js Dockerfile
Shrink a bloated 1GB Docker image down to under 150MB.
Define a Multi-Container Architecture
Write a `docker-compose.yml` to spin up a Node API, Postgres database, and Redis cache.
Design a Kubernetes Deployment
Write the manifests to deploy a highly available service to a Kubernetes cluster.
Docker Containerization & Multi-Service Orchestration
Containerization packages applications with their exact dependencies for consistent execution across environments. Engineering teams assess developers on multi-stage Dockerfiles, Docker Compose multi-container setups, non-root user execution, and network isolation.
1. Multi-Stage Dockerfile & Security Config
Optimized multi-stage Dockerfile shrinking final production image size and enforcing non-root user execution.
2. Multi-Container docker-compose.yml Architecture
Docker Compose setup orchestrating application servers, database instances, Redis caches, and reverse proxies.
3. Container Healthcheck & Resource Log
Inspection log documenting container health checks, memory resource limits, and internal network isolation.
Frequently Asked Questions (Containerization & Orchestration)
Why are multi-stage Docker builds recommended?
Multi-stage builds separate compilation build tools from the runtime image, drastically reducing final image size and attack surface.
Why should containers avoid running as root?
Running containers as root poses container breakout security risks; non-root users limit attacker permissions if a container is compromised.
What is the difference between Docker volume mounts and bind mounts?
Volume mounts are managed entirely by Docker in host storage, making them safer and persistent across container rebuilds. Bind mounts link to exact host paths, best for local dev code reloading.
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