BuildKit is a new and improved tool for building Docker images: it’s faster, has critical features missing from traditional
Dockerfileslike build secrets, plus additionally useful features like cache mounting. So if you’re building Docker images, using BuildKit is in general a good idea.
And then there’s Podman: Podman is a reimplemented, compatible version of the Docker CLI and API. It does not however implement all the BuildKit
Dockerfileextensions. On its own, then, Podman isn’t as good as Docker at building images.
There is another option, however: BuildKit has its own build tool, which is distinct from the traditional docker build, and this build tool can work with Podman.
Let’s see where Podman currently is as far as BuildKit features, and how to use BuildKit with Podman if that is not sufficient.
Source: Using Podman with BuildKit, the better Docker image builder, an article by Itamar Turner-Trauring.