So, if I understand correctly, a "unikernel" is what we used to call an "executive" except it is intended to be run as a guest on a virtual machine provided by a full-fledged traditional kernel/userspace OS instead of on bare metal.

The article does reintroduce some concepts that were commonplace when I was first learning computers and it gives them some new names. I like that good ideas can still be useful after years of not being the latest fad, and it's great that someone can get new credit for an old idea with just a little bit of marketing spin.

Hypervisor as a microkernel

I would like to follow the tutorial but it mentions a playground.

Am I missing something as I cannot find a link or instructions for the playground.

This is really well written, thanks for sharing.

I didn't understand the point of using Unikraft though, if you can boot linux in much less than 150ms, with a far less exotic environment

the missing piece of unikernel is debuggability & observability

- it need to be easy to replicate on dev machine & easy to debug - it needs to integrate well with current obs stack. easy to debug in production.

without clear debuggability & observability, i would never put it into production

I've found the idea of unikernels interesting for several years now, is there a tl;dr on why they don't seem to have taken off, like at all? Or is it all happening behind some doors I don't have access to?

cool stuff