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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