Hi all,
we are using "ceph-volume inventory" for checking if a disk can host an OSD or
not prior to running "ceph-volume lvm batch". Unfortunately, these two tools
behave inconsistently. Our use case are SSDs with multiple OSDs per disk and
re-deploying one of the OSDs on disk (the OSD was purged with "ceph-volume lvm
zap --osd-id ID" and the left-over volume removed with "lvremove
OSD-VG/OSD-LV").
Ceph-volume inventory reports a disk as unavailable even though it has space
for the new OSD. On the other hand, ceph-volume lvm batch happily creates the
OSD. Expected is that inventory says there is space for an OSD and reports the
disk as available. Is there any way to get this to behave in a consistent way?
I don't want to run lvm batch for testing and then try to figure out how to
interpret the conflicting information.
Example outputs below (for octopus and pacific), each of these disks has 1 OSD
deployed and space for another one. Thanks for any help!
[root@ceph-adm:ceph-19 ~]# ceph-volume inventory --format json-pretty /dev/sdt
{
"available": false,
"device_id": "KINGSTON_SEDC500M3840G_50026B72825B6A67",
"lsm_data": {},
"lvs": [
{
"block_uuid": "iZGHyl-oY3R-K6va-t6Ji-VxFg-8K0V-Pl978X",
"cluster_fsid": "e4ece518-f2cb-4708-b00f-b6bf511e91d9",
"cluster_name": "ceph",
"name": "osd-data-4ebd70a7-d51f-4f1c-921e-23269eb050fe",
"osd_fsid": "a4f41f0e-0cf5-4aab-a4bb-390a64cfb01a",
"osd_id": "571",
"osdspec_affinity": "",
"type": "block"
}
],
"path": "/dev/sdt",
"rejected_reasons": [
"LVM detected",
"locked"
],
"sys_api": {
"human_readable_size": "3.49 TB",
"locked": 1,
"model": "KINGSTON SEDC500",
"nr_requests": "256",
"partitions": {},
"path": "/dev/sdt",
"removable": "0",
"rev": "J2.8",
"ro": "0",
"rotational": "0",
"sas_address": "0x500056b317b777ca",
"sas_device_handle": "0x001e",
"scheduler_mode": "mq-deadline",
"sectors": 0,
"sectorsize": "512",
"size": 3840755982336.0,
"support_discard": "512",
"vendor": "ATA"
}
}
[root@ceph-adm:ceph-19 ~]# ceph-volume lvm batch --report --prepare --bluestore
--no-systemd --crush-device-class rbd_data --osds-per-device 2 -- /dev/sdt
--> DEPRECATION NOTICE
--> You are using the legacy automatic disk sorting behavior
--> The Pacific release will change the default to --no-auto
--> passed data devices: 1 physical, 0 LVM
--> relative data size: 0.5
Total OSDs: 1
Type Path LV
Size % of device
----------------------------------------------------------------------------------------------------
data /dev/sdt 1.75
TB 50.00%
# docker run --rm -v /dev:/dev --privileged --entrypoint /usr/sbin/ceph-volume
"quay.io/ceph/ceph:v16.2.10" inventory --format json-pretty /dev/sdq
{
"available": false,
"device_id": "",
"lsm_data": {},
"lvs": [
{
"block_uuid": "ZtEuec-S672-meb5-xIQP-D20n-FjsC-jN3tVN",
"cluster_fsid": "e4ece518-f2cb-4708-b00f-b6bf511e91d9",
"cluster_name": "ceph",
"name": "osd-data-37e894ed-167f-4fcc-a506-dca8bfc6c83f",
"osd_fsid": "eaf62795-7c24-48e4-9f64-c66f42df973a",
"osd_id": "582",
"osdspec_affinity": "",
"type": "block"
}
],
"path": "/dev/sdq",
"rejected_reasons": [
"locked",
"LVM detected"
],
"sys_api": {
"human_readable_size": "3.49 TB",
"locked": 1,
"model": "KINGSTON SEDC500",
"nr_requests": "256",
"partitions": {},
"path": "/dev/sdq",
"removable": "0",
"rev": "J2.8",
"ro": "0",
"rotational": "0",
"sas_address": "0x500056b397fe9ac5",
"sas_device_handle": "0x001b",
"scheduler_mode": "mq-deadline",
"sectors": 0,
"sectorsize": "512",
"size": 3840755982336.0,
"support_discard": "512",
"vendor": "ATA"
}
}
# docker run --rm -v /dev:/dev --privileged --entrypoint /usr/sbin/ceph-volume
"quay.io/ceph/ceph:v16.2.10" lvm batch --report --prepare --bluestore
--no-systemd --crush-device-class rbd_data --osds-per-device 2 -- /dev/sdq
Total OSDs: 1
Type Path LV
Size % of device
----------------------------------------------------------------------------------------------------
data /dev/sdq 1.75
TB 50.00%
--> DEPRECATION NOTICE
--> You are using the legacy automatic disk sorting behavior
--> The Pacific release will change the default to --no-auto
--> passed data devices: 1 physical, 0 LVM
--> relative data size: 0.5
Best regards,
=================
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
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