The stage is where images are configured to be bootable. You can view images that you can currently boot using:

sudo darch stage list

To upload a image that you have built/pulled:

sudo darch stage upload myimage:latest

The uploading process does a few things:

  • Generating a squashfs image that represents your root file system.
  • Generating an initramfs that is capable of finding your squashfs, mounting, and chroot into it.
  • Builds the kernel
  • Updates grub entries so that your image becomes available for selection.