Add ceph to proxmox
Make sure you empty the data (remove all vm's that uses this storage lvm) Then when done, run in shell: lvs lvremove pve/data Recreate some of the space lvcreate -L 500G --thinpool data pve then do the ceph for remaining space lvcreate -l100%FREE -n cephosd pve ceph auth get client.bootstrap-osd > /var/lib/ceph/bootstrap-osd/ceph.keyring ceph-volume lvm prepare --data pve/cephosd ceph-volume lvm activate --all pveceph pool create ceph-vm --pg_num 128 --size 3 --min_size 2