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Bài 5: Docker Security Best Practices

Docker containers have become an integral part of modern application development and deployment. However, with their widespread use comes the need for robust security measures. This guide will walk you through some best practices for securing your Docker environment.

1. Use Official Images​

Always use official images from trusted sources. These images are regularly updated and patched for security vulnerabilities.

docker pull ubuntu:latest

2. Scan Images for Vulnerabilities​

Use tools like Docker Scan or Trivy to check your images for known vulnerabilities.

docker scan myimage:latest

3. Limit Container Resources​

Prevent DoS attacks by limiting container resources:

docker run -d --cpus=".5" --memory=512m nginx

4. Use Non-Root Users​

Run containers as non-root users to minimize potential damage from container breakouts:

FROM ubuntu:latest
RUN groupadd -r myuser && useradd -r -g myuser myuser
USER myuser

5. Use Docker Content Trust​

Enable Docker Content Trust to ensure image integrity:

export DOCKER_CONTENT_TRUST=1
docker pull ubuntu:latest

6. Implement Network Segmentation​

Use Docker networks to isolate containers:

docker network create --driver bridge isolated_network
docker run --network=isolated_network -d nginx

7. Keep Docker Updated​

Regularly update Docker to the latest version to benefit from security patches.

8. Use Security Options​

Utilize Docker's security options:

docker run --security-opt=no-new-privileges nginx

9. Implement Logging and Monitoring​

Use Docker's logging capabilities and consider integrating with monitoring solutions:

docker run --log-driver=syslog nginx

10. Secure Docker Daemon​

Ensure the Docker daemon is only accessible by trusted users:

sudo usermod -aG docker $USER

By following these best practices, you can significantly enhance the security of your Docker environment. Remember, security is an ongoing process, so stay informed about the latest Docker security updates and recommendations.


This new file provides a comprehensive overview of Docker security best practices, covering various aspects from image selection to runtime security. It's positioned as the 7th item in the sidebar (you can adjust the `sidebar_position` as needed) and is titled "Bài 5: Docker Security Best Practices" to fit with your existing numbering scheme.