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The key features of stacker are:

Single Binary

One statically built binary for simplified download and installation with no additional dependencies or services.


Build using user namespaces and avoid privileges on host.


Hermetically sealed environment for image builds using LXC containers so that builds are repeatable without side-effects.


Build only the images necessary and rebuild only if any input changed.

Open source

Released as an open source project under Apache2 License.

GitHub Action

Integrated with GitHub as a build-and-push action.

Last update: January 1, 2023