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vm:proxmox:ceph:db:move_db_disks [2024/02/18 09:22] – niziakvm:proxmox:ceph:db:move_db_disks [2025/03/30 21:39] (current) – niziak
Line 45: Line 45:
   PV UUID               pjYGgY-SS26-m8Sc-aWyQ-3zzY-f7Iz-XGoI90   PV UUID               pjYGgY-SS26-m8Sc-aWyQ-3zzY-f7Iz-XGoI90
 </code> </code>
 +
 +===== resize exsiting DB partition =====
 +
 +Remove separate DB and migrate data back to main storage:
 +<code bash>
 +ceph osd set noout
 +systemctl stop ceph-osd@3.service
 +
 +cat /var/lib/ceph/osd/ceph-3/fsid 
 +lvdisplay
 +
 +ceph-volume lvm migrate --osd-id 3 --osd-fsid 024c05b3-6e22-4df1-b0af-5cb46725c5c8 --from db --target ceph-5582d170-f77e-495c-93c6-791d9310872c/osd-block-024c05b3-6e22-4df1-b0af-5cb46725c5c8
 +--> Migrate to existing, Source: ['--devs-source', '/var/lib/ceph/osd/ceph-0/block.db'] Target: /var/lib/ceph/osd/ceph-0/block
 +--> Migration successful.
 +</code>
 +
 +Create (or resize) new PV,VG,LV for DB and attach it:
 +
 +<code bash>
 +pvcreate /dev/nvme0n1p6
 +
 +vgcreate ceph-db-8gb /dev/nvme0n1p6
 +OR
 +vgextend ...
 +
 +lvcreate -n db-8gb -l 100%FREE ceph-db-8gb
 +OR
 +lvextend -l +100%FREE ceph-db/db
 +
 +ceph-volume lvm new-db --osd-id 0 --osd-fsid 024c05b3-6e22-4df1-b0af-5cb46725c5c8 --target ceph-db-8gb/db-8gb
 +--> Making new volume at /dev/ceph-db-8gb/db-8gb for OSD: 0 (/var/lib/ceph/osd/ceph-0)
 +Running command: /usr/bin/chown -h ceph:ceph /var/lib/ceph/osd/ceph-0/block.db
 +Running command: /usr/bin/chown -R ceph:ceph /dev/dm-0
 +--> New volume attached.
 +</code>
 +
 +<code bash>
 +ceph-volume lvm migrate --osd-id 0 --osd-fsid 024c05b3-6e22-4df1-b0af-5cb46725c5c8 --from data db --target ceph-db-8gb/db-8gb
 +--> Migrate to existing, Source: ['--devs-source', '/var/lib/ceph/osd/ceph-0/block'] Target: /var/lib/ceph/osd/ceph-0/block.db
 +--> Migration successful.
 +</code>
 +
 +<code bash>
 +systemctl start ceph-osd@3.service
 +ceph osd unset noout
 +</code>
 +
 +===== OR: create new one =====
 +
  
 Create new 41GB (41984MB) partition (/dev/nvme0n1p6) Create new 41GB (41984MB) partition (/dev/nvme0n1p6)