BuildKit for improved builds in Docker - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is BuildKit in Docker?

BuildKit is a modern build engine for Docker that improves build speed, efficiency, and adds new features like better caching and parallel build steps.

beginner

How do you enable BuildKit when running a Docker build?

You enable BuildKit by setting the environment variable DOCKER_BUILDKIT=1 before running the docker build command.

intermediate

Name one key advantage of using BuildKit over the traditional Docker build engine.

BuildKit supports parallel build steps, which means it can build different parts of the image at the same time, making builds faster.

intermediate

What is a practical way BuildKit improves caching during Docker builds?

BuildKit uses smarter caching that can reuse parts of previous builds even if some steps change, reducing the time needed for rebuilds.

advanced

How can BuildKit help with multi-platform Docker images?

BuildKit can build images for multiple platforms (like Linux and Windows) in one command, simplifying cross-platform builds.

How do you activate BuildKit for a Docker build?

A Use --enable-buildkit flag in docker build

B Set DOCKER_BUILDKIT=1 environment variable

C Install a separate BuildKit package

D BuildKit is enabled by default, no action needed

You enable BuildKit by setting the environment variable DOCKER_BUILDKIT=1 before running docker build.

What is one benefit of BuildKit's parallel build steps?

A It speeds up the build by running steps simultaneously

B It allows building multiple images at once

C It reduces the size of the final image

D It automatically updates Docker to the latest version

BuildKit speeds up builds by running independent build steps in parallel.

Which feature helps BuildKit reuse parts of previous builds?

A Layer squashing

B Automatic tagging

C Image compression

D Smarter caching

BuildKit uses smarter caching to reuse unchanged parts of previous builds.

BuildKit can build images for multiple platforms in one command. Which platforms are commonly supported?

A FreeBSD and AIX

B Android and iOS

C Linux and Windows

D MacOS and Solaris

BuildKit supports building images for Linux and Windows platforms.

What is the default build engine in Docker if BuildKit is not enabled?

A Legacy builder

B Kaniko

C BuildKit

D Docker Compose

Without enabling BuildKit, Docker uses the legacy builder engine.

Explain how BuildKit improves Docker build performance and caching.

Think about how BuildKit runs tasks and reuses previous work.

Describe the steps to enable and use BuildKit in a Docker build process.

Focus on environment setup and command usage.