I would be interested for HA small devices.
The idea is to have a little local box which can be used as password manager.
What I value out of this box is redundancy: each pi zero has its own ram/disk.
(the single point of failure is the B+, I know, but it can be replaceable)
The interface can be: API or screen.
For vault there is a different storages that can be used, but on the pi zero they might be heavy.
Moreover, tarantoool seems to be the only one that has master replication with the possibility
to store on disk and a kinda recovery.
This is why I ask about.
Thanks
F