In the past some people asked about using shiftfs on other distros than ubuntu.
Note: Ubuntu has it built-in by default.
More info on shiftfs in stgrabers article:
Trying out shiftfs
As stgraber pointed out in his article, shiftfs can also easily be implemented via dkms.
For those new to the concecpt of dkms, it let’s you install additional kernel modules without rebuilding the kernel.
Some time ago I set up a github repo for exactly this:
Basically the kernel module consists of one file
shiftfs.c, which then gets compiled and installed.