partprobe triggers reloading partition table, but apparently it isn't
guaranteed udev re-create device nodes at the time it finishes. This may lead
to /dev/mapper/dmroot pointing to nowhere. Fix this by calling udevadm settle
after reloading partition table.
parted tries to load random data for possible partiont table UUID
generation, even though there is no need to generate new UUID. In case
of early VM startup, this is very undesirable as random entropy pool may
not be initialized yet, which will cause parted to block.
Use sfdisk instead, which doesn't try to do that. And also can relocate
backup GPT and resize partition in one go.
FixesQubesOS/qubes-issues#4419
If root filesystem is the last partition (new layout), resize it
in-place. Use 'parted' tool because it can resize just one partition,
without need to specify the whole new partition table. Since the
partition is mounted, parted is unhappy to modify it. Force it by
answering to its interactive prompts, and add (apparently not
documented) ---pretend-input-tty to use those answers even
though stdin is not a tty. Split the operation into multiple parted
calls, for more reliable interactive prompts handling.
Qubes 3.x disk layout (no partition table) is also supported, but the
one that was used in Qubes 4.0 rc1 (root filesystem as the first
partition) is not.
FixesQubesOS/qubes-issues#3173QubesOS/qubes-issues#3143
