Building Base Docker Images

When building and deploying containerized applications with Docker, it’s essential to ensure that your base images are up-to-date and secure. Managing base images in Docker requires careful planning and attention to detail. Here are some best practices to keep in mind:

1. ??? ???????? ?? ??????? ???? ??????: Official base images are provided and maintained by Docker or other trusted sources and are generally more secure and reliable than unverified images. RedHat UBI base images are my favorite.
2. ??? ? ???????? ??????? ?? ??? ???? ?????: To ensure consistency and predictability in your Docker builds, it’s a best practice to use a specific version of the base image, rather than relying on the “latest” tag. By using a specific version, you can ensure that your builds are reproducible and can be easily rolled back if necessary.
3. ???????? ??? ?????? ?? ???? ??????: Using fewer base images can help simplify your Docker image management process and reduce the risk of conflicts or compatibility issues.
4. ??? ? ?????? ???? ?????: If you are building multiple Docker images that share the same dependencies and configurations, you should consider creating a common base image. A common base image can help you reduce the amount of duplication in your images, making them easier to maintain and update.
5. ??? ????????? ????? ??? ???? ????? ???????: Tools like Dependabot and Renovate can help automate the process of updating base images, reducing the risk of human error and saving time. When a tool like Dependabot or Renovate creates a pull request with an updated Docker image version, it’s important to have automated tests in place to validate the update before it’s promoted to the next environment.
6. ???????? ????? ???? ??? ???????????: Optimizing Docker images for size and performance is an important consideration when managing base images. Large or inefficient images can increase deployment times and resource usage, so it’s important to keep images as small and streamlined as possible. This includes using multi-stage builds, minimizing the number of layers, and reducing the number of files and dependencies included in the image.
7. ??????? ??? ???????? ???????????????: Security vulnerabilities in base images can pose a significant risk to your application and its data. To minimize this risk, it’s important to regularly monitor your base images for security vulnerabilities. If a vulnerability is found, you should update your base image as soon as possible to address the issue.