Add /dev/block, /dev/disk/by-label, /dev/disk/by-partlabel symlinks
Add /dev/block symlinks. These are major/minor filenames that link to the related device filename in /dev. The same entries are created by eudev/udev. cloud-init makes uses /dev/block/ entries as part of determining the device containing the rootfs.
Add /dev/disk/by-label symlinks.
Add /dev/disk/by-partlabel symlinks (if util-linux blkid is installed).
Add /dev/disk/by-id entries for MMC, NVME, and SATA devices.