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How to create a  pool in replica 3 which uses a specific device class

[root@ceph-mon-01 ~]# ceph osd pool get testfs crush_rule
crush_rule: replicated_hdd-cephfs

Assumo che ci siano gia' degli OSD che sono stati messi nella device class hdd-cephfs (v.

Creo la crush rule:

[root@ceph-mon-01 ~]# ceph osd crush rule create-replicated replicated_hdd-cephfs default host hdd-cephfs

Creo poi un pool che usi questa crush rule:

 [root@ceph-mon-01 ~]#  ceph osd pool create testfs 32 32 replicated replicated_hdd-cephfs

Verifico:

[root@ceph-mon-01 ~]# ceph osd pool get testfs crush_rule
crush_rule: replicated_hdd-cephfs