14 Docker Production

Docker production covers the collection of practices — appropriate resource limits, health checks, logging configuration, security hardening, and resilient orchestration — that distinguish a genuinely production-ready containerized deployment from one that merely happens to work during local development or testing.

Why Production Requirements Differ Meaningfully From Development

A development environment optimizes for convenience and fast iteration; production needs to optimize for reliability, security, and observability under real, often unpredictable load, requiring deliberate additional configuration beyond what development needs.

services:
  app:
    build: .
    volumes:
      - .:/app
    command: npm run dev

services:
  app:
    image: registry.example.com/myapp:1.0
    deploy:
      resources:
        limits:
          memory: 512M
      restart_policy:
        condition: on-failure

The production configuration explicitly constrains resources and defines restart behavior, concerns that simply don't matter in the more permissive development context.

Key Areas Requiring Specific Production Attention

Resource limits, health checks, structured logging, and security hardening each need deliberate configuration appropriate to running real workloads reliably.

services:
  app:
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
      interval: 30s
    deploy:
      resources:
        limits:
          cpus: '1.0'
          memory: 512M

Why Treating Production Configuration as a Distinct, Deliberate Concern Matters

Simply taking a development configuration and running it in production, without these additional considerations, risks resource exhaustion, undetected failures, and security exposure that a properly configured production setup specifically guards against.

docker stats

Why Docker Production Matters

Recognizing production's distinct requirements, and deliberately configuring for them rather than reusing development defaults, is essential for an application to actually run reliably, securely, and observably once it's handling real traffic and real consequences for failure.