FabU: can I use Ceph in a _very_ small cluster?

Ceph is great, but it needs some resources above the theoretical minimum to work reliably. My assumptions for the following text:

• you want to use Ceph because... why not?
• you want to use High Availability - which requires Shared Storage
• you want to start as small (and cheap) as possible, because this is... “only” a Homelab

You plan for three Nodes. Each node has s single dedicated disk for use as an “OSD”. This is the documented minimum, so it...

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