Booting Qemu-KVM VM Without Grub (or any bootloader)

I am looking more and more into Cloud-Hypervisor or Firecracker. The other day I had this random thoughts: “These trendy new hypervisor can boot a kernel directly, why can’t qemu do it?”. It turned out that it can perfectly does that. Here is a random recipe to have a working Ubuntu, without having to use grub or any bootloader. Note that ubuntu first boot is still utterly slow and bloated (snap and cloud-init, I’m looking at you !...

January 21, 2022 · Rémi Desgrange