1) Is it normal that ceph-volume lvm batch doesn't support partitions for block.db ?
For some time now, yeah, ceph-volume has been blocking use of partitions for all device types. It came from https://github.com/ceph/ceph/commit/9742efa907aa54b3135f5daf73080b7be12534eb a few years ago. I've had discussions with the current ceph-volume maintainer about whether this actually should be the case or not that have implied we may want to change this, but that is the current behavior.
2) Is there any way to configure the ceph deployment to use ceph-volume lvm create instead of the batch command? Will ceph-volume lvm create support partitions for block.db ?
Not in a cephadm deployment. We route all the OSD creation through the batch command. The best I can think of to do right now would be to create an LV on top of the partition. I think this works because batch will take LVs. LVs can only be passed using paths though and I think I remember the format for the paths with LVs not being intuitive. Something like <vg>/<lv> (e.g. vg_nvme/lv_4)
On Thu, May 2, 2024 at 10:19 AM Yonatan Zaken <yzaken@xxxxxxxxxx> wrote:
Hi All,_______________________________________________I am using openstack's tripleo wallaby version for deployment of my overcloud and using the openstack overcloud ceph deploy command for deploying the ceph cluster.The Ceph version is Reef release v8.2.2.
My templates/ceph_spec.yaml file contains the following:data_devices:
paths:
- /dev/vdb
- /dev/vdcdb_devices:paths:
- /dev/vdd1
placement:
hosts:
- host1
- host2
service_id: default_drive_group
service_name: osd.default_drive_group
service_type: osd
During deployment of the ceph cluster I noticed it fails when trying to execute the following command which is executed in a container (as seen in /var/log/ceph/cephadm.log on the storage node):
ceph-volume lvm batch --no-auto /dev/vdb /dev/vdc --db-devices /dev/vdd1 --yes --no-systemd
with the following error:
/bin/podman: stderr ceph-volume lvm batch: error: /dev/vdd1 is a partition, please pass LVs or raw block devices
My questions are:
1) Is it normal that ceph-volume lvm batch doesn't support partitions for block.db ?2) Is there any way to configure the ceph deployment to use ceph-volume lvm create instead of the batch command? Will ceph-volume lvm create support partitions for block.db ?
Best Regards,
Yonatan
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