dynamic overlays

[cgwalters]

I think it would make sense to support functionality similarly to https://www.freedesktop.org/software/systemd/man/systemd-sysext.html - we could even use that as a backend, though it needs some design around interactions eventually lowering "live apply" type flows.

A strawman could look like:

$ bootc overlay add quay.io/examplecorp/seattle-manufacturing:wifi

That would add a new container image that would be dynamically unioned with the host's rootfs - on updates, we reapply both - and we'd also verify compatibility and fail if e.g. they appeared somehow incompatible. (A lot of potential things to do in "verify compatibility...")

[vrothberg]

Going through old issues at the moment.

@cgwalters, do you still think dynamic overlays like that make sense? Do you have a concrete use case or user story in mind?