Use-Case Project: Docker Container Best Practices

Hands-on project to apply the top 18 ✅️ Dos & 🚫 Don'ts Docker container best practices

🌐 Website • ⭐ GitHub (1.8k+) • ✉️ Community • 💬 Telegram

Nowadays, Docker containers are a de facto standard in the market. Software Engineers and DevOps Engineers work with containers every day.

This hands-on project to apply the top 18 ✅️ Dos & 🚫 Don'ts Docker container best practices like:

Essential Practices

• Use Dockerfile linter

• Check Docker language-specific best practices

• Create a single application per Docker image

• Create configurable ephemeral containers

Image Practices

• Use optimal base image

• Pin versions everywhere

• Create an image with the optimal size

• Use multi-stage whenever possible

• Avoid any unnecessary files

Security Practices

• Always use trusted images

• Never use untrusted resources

• Never store sensitive data in the image

• Use a non-root user

• Scan image vulnerabilities

Misc Practices

• Leverage Docker build cache

• Avoid system cache

• Create a unified image across envs

• Use ENTRYPOINT with CMD

If there is one piece of advice from this project, it will be: Use the Dockerfile linter! Use it via CLI or integrate it with your IDE (e.g., VS Code hadolint extension), and integrate it with your CI pipelines! Using it will avoid at least 50% of the Docker issues with your eyes shut!

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Thanks for your time, and hope you enjoy the journey! Here is a kickoff checklist:

• 📃 Read the frequently asked questions page, it has many valuable information.

• ⭐ Star the project repo on GitHub for better visibility.

• 🌐 Join the Telegram group for interactive communication.

Happy DevOpsing ♾️

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