WIP Add LUKS encryption

[edeckers]

This PR will add support for LUKS encryption, as mentioned in #311. Code is mostly taken from cloudscale-ch/csi-cloudscale.

[lukasskopos]

Any progress here?

[edeckers]

Hi @lukasskopos , thank you for your message :)

Every once in a while I update this branch for myself, so I can use it on my own instance. But since this works good enough for me and I don't have much time to spare these days, I'm not planning on doing any extra development on it.

I don't recall running into any major issues with this code, so I think the main todos are:

1. Adding some useful tests
2. Check whether or not merging this code is in violation of the cloudscale-ch/csi-cloudscale license, where I took most of the code from, as mentioned in the first message of this thread.

[davidhalter]

Check whether or not merging this code is in violation of the cloudscale-ch/csi-cloudscale license

It's not in violation of our license. Feel free to steal it :)

[edeckers]

Check whether or not merging this code is in violation of the cloudscale-ch/csi-cloudscale license

It's not in violation of our license. Feel free to steal it :)

Wow, that was quick 😅 , thank you!