Composefs is new filesystem that supportsvalidating, content-sharing readonly images. It has recently had an 1.0 release, and has started to be used for image-based operating system. However, composefs is also a great fit for container image.

This talk will explain what composefs is and how it works, and then talk about what advantages composefs brings to containers. It will also talk about the current level of support for composefs in the podman image store, and show some demos of it.