Perhaps not SBCs, but I have 4x HP 6300s and have been running
Kubernetes together with Ceph/Rook for more than 3 years. The HPs can be
picked up around 80-120eu. I learned so much in 3 years, last time I had
that was when I started using Linux. This was money well spent and still
is, it runs nextcloud, home automation, Wifi controller (unifi
controller), websites -- and all that safely on Ceph.
Also a big plus of those HP typical business desktops is Intel AMT. It's
kind of a poor-man's Remote Management Console (similar-ish to iDRAC and
iLO). This integrates nicely with, in my case Ubuntu MAAS. So this
allows me to programmatically spin up one of those nodes. Or take a node
out for maintenance.
The 4 nodes and network switch run around 100W which I think is pretty
ok, but again, this is not SBC territory; though if you think the SBCs
will run with a lot less power, think again. If you use spinners expect
them to be the main power user in your setup. I never expected them to
really do 6W when idle and that really adds up when you have multiple
disks per node. If you don't need the sheer data capacity, choose SSDs.
I migrated to SSDs for at least the OS disks and that got me into the
100W baseline. Also take at least 8GB per node, including 1 OSD, and an
extra 4GB for every extra OSD.
Hans
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