Great question! Making the jump from local Docker development to production involves tweaking your setup for stability, security, and reliability—let’s walk through the key best practices and a tailored docker-compose config for your scenario where MySQL and Redis live on dedicated servers.

Core Guidelines to Follow #

• Use Specific, Minimal Images
  Ditch latest tags and opt for explicit versions (e.g., php:8.2-apache-bookworm) to avoid unexpected updates. Use slim/alpine-based images when possible to reduce attack surface and image size. Never bake sensitive credentials or configs into your images—use environment variables or secret management tools instead.

• Prioritize Security

  • Run containers as non-root users whenever possible (modify your Dockerfile to create a dedicated user for the app).
  • Restrict network access: Use a custom bridge network for your app, and ensure external MySQL/Redis servers only allow connections from your app server’s IP via firewalls/security groups.
  • Enable TLS encryption for MySQL and Redis connections to prevent data interception.
  • Keep Docker engine and images updated regularly to patch vulnerabilities.

• Ensure High Availability
  Set restart: always on your containers to auto-recover from crashes. For larger deployments, consider Docker Swarm or Kubernetes to manage orchestration, load balancing, and failover—though for small-to-medium apps, a well-configured Docker Compose setup with a reverse proxy can work.

• Manage Logs & Monitoring
  Configure Docker’s logging driver (e.g., json-file or syslog) to centralize logs. Use tools like Prometheus + Grafana to monitor container resource usage, app performance, and external service health. Set up alerts for critical issues like database connection failures.

Since your MySQL and Redis are on dedicated servers, we’ll remove those services from the compose file and configure your php-apache container to connect to them via environment variables. Here’s a production-ready config:

version: '3.8'

services:
  php-apache:
    image: php:8.2-apache-bookworm
    container_name: php-app-prod
    restart: always
    # For production, use a reverse proxy like Nginx instead of exposing directly to 80/443
    ports:
      - "127.0.0.1:8080:80" # Restrict to localhost, let Nginx handle public traffic
    environment:
      # MySQL connection details
      DB_HOST: your-mysql-server-private-ip
      DB_PORT: 3306
      DB_NAME: your-production-db
      DB_USER: your-db-service-user
      DB_PASSWORD: ${DB_PASSWORD} # Pull from .env file or Docker Secrets
      # Redis connection details
      REDIS_HOST: your-redis-server-private-ip
      REDIS_PORT: 6379
      REDIS_PASSWORD: ${REDIS_PASSWORD}
      REDIS_DB: 0 # Specify Redis database if needed
    volumes:
      # Mount app code (use :ro for read-only in production to prevent accidental changes)
      - ./your-app-code:/var/www/html:ro
      # Mount custom Apache configs (e.g., virtual hosts, security settings)
      - ./apache-prod-config:/etc/apache2/sites-available:ro
    networks:
      - app-private-network

networks:
  app-private-network:
    driver: bridge
    internal: false # Set to true if you don't need external access to the network

Key Notes on This Config: #

• Port Binding: We bind to 127.0.0.1:8080 instead of 0.0.0.0:80 to restrict direct public access—use an Nginx reverse proxy to handle SSL termination, load balancing, and static file caching for the public-facing side.
• Secret Management: Never hardcode passwords! Use a .env file (add it to .gitignore) or Docker Secrets (if using Docker Swarm) to store sensitive values.
• Read-Only Volumes: The :ro flag on code and config mounts prevents accidental modifications to your app in production.

• Reverse Proxy Setup: Add an Nginx container to your compose file (or use a dedicated Nginx server) to handle HTTPS with Let’s Encrypt certificates, route traffic, and cache static assets. This adds a critical layer of security and performance.
• Data Backups: Implement regular backups for your external MySQL and Redis servers—automate this with tools like mysqldump for MySQL and redis-cli SAVE for Redis, storing backups in a secure, offsite location.
• Staging Environment: Test your production config in a staging environment first to catch issues with external service connections, permissions, or performance before deploying to production.

内容的提问来源于stack exchange，提问作者xil3