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diskimage-builder/diskimage_builder/elements/sysprep
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Steve Baker 147641fc3e Set machine-id to uninitialized to trigger first boot 
According to the systemd documentation[1], if /etc/machine-id is empty
it will be populated with a unique value, but not in a way which
triggers an actual first boot event (running units with
ConditionFirstBoot=yes set)

This change writes "uninitialized" to /etc/machine-id to ensure that
systemd-firstboot.service actually runs, and other units can use
first-boot-complete.target as a dependency to trigger on first boot.

Since /var/lib/dbus/machine-id is sometimes a symlink to
/etc/machine-id, it is truncated before writing to /etc/machine-id.

On older versions of systemd before first boot semantics were
formalised, any non-uuid value will trigger a new machine-id to be
generated, so "uninitialized" also works.

[1] https://www.freedesktop.org/software/systemd/man/machine-id.html#First%20Boot%20Semantics

Change-Id: I77c35e51a3da2e8a6b5a2c80d033a159b303c9af
2022-04-21 09:39:42 +12:00
..
bin Handle btrfs root subvolume for fedora extract-image 2022-03-11 15:48:03 +13:00
finalise.d Set machine-id to uninitialized to trigger first boot 2022-04-21 09:39:42 +12:00
README.rst Clear /etc/machine-id to avoid duplicate machine-ids 2017-08-06 13:56:58 -04:00

README.rst 

sysprep
=======

This element holds configuration and scripts that are common for all
distributions.