Runtime Live layering

[mudler]

Is your feature request related to a problem? Please describe.
Currently to add packages there are two options: or consume specially crafted bundles that installs packages into the persistent partition, or either customize the source container image and re-build the ISO with osbuilder.

Describe the solution you'd like
A runtime live layer mechanism. A draft for systemd based system is in #141 , but would be prefered a dracut-modules that acts similarly and extends supports to all the other distros (otherwise alpine would be left in the cold)

Describe alternatives you've considered
Creating custom images with osbuilder

Additional context
This is an additional features to complete the featureset around customization and #116

[mudler]

#141 Covers systemd scenario - can we enable it in the initramfs and make it available for alpine? or can we either use an equivalent to it for openRC based systems?

[mudler]

pretty sure we can just use systemd-sysext everywhere

[mudler]

This belongs to immucore now, removing epic as it is now possible to do within immucore

[mudler]

cc @Itxaka

[cheese]

We need a CRD and operator to manage systemd-sysext on nodes, so we can easily apply live layering to massive nodes.