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Last active December 30, 2024 07:02
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How to move the Ceph block and db LVM disks to another machine
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README.md

How to move the Ceph block and db LVM disks to another machine

Environment

ServerA (old): Proxmox 8.3.0

  • 6 OSDs and 1 db(have all OSDs db lvs)

ServerB (new): Proxmox 8.3.0

  • No OSD, mon and mgr are installed

steps

  1. Login ServerA
  2. Add flags to ceph - noreblance norecover noscrub (I don't know if it is correct. But, no problem with my servers.)
  3. Stop OSDs
ceph osd out <osd>
systemctl stop ceph-osd@<osd>
  1. Export LVM disks
vgchange -a n <vg>
vgexport <vg>
  1. Move physical disks to ServerB
  2. Login ServerB
  3. Confirm that the VGs are available
vgscan
  1. Import VGs and rescan devices to detect added VGs
vgimport -a
uevadm trigger --subsystem-match=block --action=add
  1. Activate added VGs and LVs
vgchange -a y (not needed on my server)
ceph-volume lvm activate --all
ceph osd in <osd>

NOTE: pveceph automatically creates a symbolic link to /etc/ceph/ceph.conf. However, it is not created just by installing ceph. It is necessary to install mon and mgr.

  1. Confirm that the OSD is registered
  2. Remove ceph flags
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