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ignition/README.SUSE

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Changes for openSUSE / SLE:
* ignition-mount-initrd-fstab.service / ignition-umount-initrd-fstab.service:
Upstream Ignition will only mount partitions or subvolumes explicitly
mentioned in the Ignition configuration. A default SUSE system, however,
is split over several subvolumes, and most users won't want to define
all the partitions again. On the other hand a lot of core functionality (e.g.
configuring a SSH certificate for the root user or adding a configuration
file) requires access to those subvolumes.
For better usability in addition to Ignition's own mount / umount stage all
files systems tagged for being mounted in the initrd ("x-initrd.mount" mount
flag) will automatically be mounted / umounted.
* ignition-setup-user.service / ignition-setup-user.sh:
The user configuration can be stored on a device with the label "ignition"
(e.g. by attaching a USB flash drive with that name) instead of using the
platform specific configuration storage mechanism.
* ignition-userconfig-timeout*.conf:
Set timeout for Ignition device so boot will just continue if no physical
Ignition configuration device is attached (e.g. when using platform
specific configuration).
* ignition-rmcfg-suse.conf:
Adapt systemd service to match our own packaging: We do not support
ConditionFirstBoot, and additionally support auto-detection of the platform
(see ignition-suse-generator), so the detection whether the stage should be
called has to be done via shell script.
* ignition-touch-selinux-autorelabel.conf:
Trigger SELinux autorelabel after Ignition runs; Ignition would support
SELinux itself, however this is a compile time option, so it can't be
used here.
* ignition-suse-generator:
Replaces the upstream generator by making use of firstboot.target provided
by combustion and hooking up the services provided by this module.
Additionally it will try to autodect the platform if it is not set on the
kernel command line.
* ignition-enable-network.service / ignition-enable-network.sh:
Ignition supports detection whether the configuration requires networking
to avoid having to boot with networking enabled even when it isn't
necessary; the actual implementation to start the network is left to the
distribution.
* ignition-kargs-helper:
Distribution specific helper script to implement kernel argument support.