Creating ceph pool


Aug 16, 2019

I have Proxmox in a two nodes configuration whit 2 HDD each for deploying Ceph. When I create the Pool I got this warning:

active+undersized+degraded: 128

the Size/Min of the pool is 3/2 with 128 PGs

Any explanation why I get this warning?

Put shortly - ceph will only work in a sensible manner with minimum 3 nodes
see the reference documentation:

Else the default crush-map has a failure domain of host thus each pg needs to replicated to 3 hosts - since you have only 2 hosts the pg's are all undersized.

I hope this helps!
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