Layerfiles, Dockerfiles that build VMs
Hey HN, I’m excited to show you Layerfiles, an OSS project which gives you a single binary to build microvms using a syntax that looks like a Dockerfile. The project is currently in alpha, but it’s already able to build a VM on Linux hosts. MicroVMs are like containers, but have several upsides: - They can run on any OS, so you don’t need to run a wrapper VM like Docker Desktop does. - They also let you keep processes running during a build (RUN BACKGROUND), so you can run a webserver or build server in the background. - You can generally run them rootless without any extra configuration.…
In plain words
Layerfiles is an open-source tool that builds lightweight virtual machines using Dockerfile-like syntax. It runs as a single binary on Linux and allows developers to construct microvms that work across any operating system without requiring wrapper VMs like Docker Desktop. The tool supports background processes during builds, enabling users to run web servers or build servers simultaneously, and can operate rootless without additional configuration. Currently in alpha, Layerfiles offers an alternative to containers with greater portability and flexibility.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey HN, I’m excited to show you Layerfiles, an OSS project which gives you a single binary to build microvms using a syntax that looks like a Dockerfile. The project is currently in alpha, but it’s already able to build a VM on Linux hosts. MicroVMs are like containers, but have several upsides: - They can run on any OS, so you don’t need to run a wrapper VM like Docker Desktop does. - They also let you keep processes running during a build (RUN BACKGROUND), so you can run a webserver or build server in the background. - You can generally run them rootless without any extra configuration. Here’s an example Layerfile you can try: FROM vm/ubuntu:22.04 RUN BACKGROUND python3 -m http.server 8000 RUN curl localhost:8000 COPY . . RUN ls I'd love any comments or feedback! I’d also appreciate if someone could try building it for Mac or Windows.
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