Write down the cutover for asxpio-services step by step, with the
times measured in the rehearsal: backup 6 minutes, restore of 29 GB
3 minutes.
The backup script now tolerates files changing under tar in live mode,
which a running Minecraft world always does; in final mode, with the
servers stopped, that remains an error. The restore script can leave
the containers stopped for a restore test.
Also checked on the test server before it was deleted: the production
network layout (interfaces matched by MAC, static IPv6, the private
network on enp7s0) comes up after a reboot with the same routes the
Debian host has.
Assisted-by: Claude:fable-5-2
