сделайте корневую файловую систему изменчивой (Make the root file system volatile)
Имя (Name)
systemd-volatile-root.service, systemd-volatile-root - Make the
root file system volatile
Синопсис (Synopsis)
systemd-volatile-root.service
/usr/lib/systemd/systemd-volatile-root
Описание (Description)
systemd-volatile-root.service is a service that replaces the root
directory with a volatile memory file system ("tmpfs"), mounting
the original (non-volatile) /usr/ inside it read-only. This way,
vendor data from /usr/ is available as usual, but all
configuration data in /etc/, all state data in /var/ and all
other resources stored directly under the root directory are
reset on boot and lost at shutdown, enabling fully stateless
systems.
This service is only enabled if full volatile mode is selected,
for example by specifying "systemd.volatile=yes" on the kernel
command line. This service runs only in the initial RAM disk
("initrd"), before the system transitions to the host's root
directory. Note that this service is not used if
"systemd.volatile=state" is used, as in that mode the root
directory is non-volatile.
Смотри также (See also)
systemd(1), systemd-fstab-generator(8), kernel-command-line(7)
