Apparently, I can only use "well known" device classes in the specs,
like nvme, ssd or hdd. Every other string (even without hyphens etc.)
doesn't work.
Zitat von Eugen Block <eblock@xxxxxx>:
Reading the docs again, I noticed that apparently the keyword
"paths" is required to use with crush_device_class (why?), but that
doesn't work either. I tried it by specifying the class both
globally in the spec file as well as per device, still no change,
the OSDs come up as "hdd".
Zitat von Eugen Block <eblock@xxxxxx>:
Hi,
I'm struggling to create OSDs with a dedicated crush_device_class.
It worked sometimes when creating a new osd via command line (ceph
orch daemon add osd
host:data_devices=/dev/vdg,crush_device_class=test-hdd), but most
of the time it doesn't work. I tried it with a spec file as well,
it seems to be correctly parsed and everything, but the new OSDs
are created with hdd class, not hdd-ec. I have this spec:
cat osd-class.yaml
service_type: osd
service_id: hdd-ec
service_name: hdd-ec
crush_device_class: hdd-ec
placement:
label: osd
spec:
data_devices:
rotational: 1
size: 10G
objectstore: bluestore
I see that cephadm has stored it correctly:
ceph config-key get mgr/cephadm/spec.osd.hdd-ec
{"created": "2024-10-03T08:35:41.364216Z", "needs_configuration":
true, "spec": {"placement": {"label": "osd"}, "service_id":
"hdd-ec", "service_name": "osd.hdd-ec", "service_type": "osd",
"spec": {"crush_device_class": "hdd-ec", "data_devices":
{"rotational": 1, "size": "10G"}, "filter_logic": "AND",
"objectstore": "bluestore"}}}
And it has the OSDSPEC_AFFINITY set:
cephadm ['--env', 'CEPH_VOLUME_OSDSPEC_AFFINITY=hdd-ec', '--image',
'registry.domain/ceph@sha256:ca901f9ff84d77f8734afad20556775f0ebaea6c62af8cca733161f5338d3f6c', '--timeout', '895', 'ceph-volume', '--fsid', '7d60533e-7e9e-11ef-b140-fa163e2ad8c5', '--config-json', '-', '--', 'lvm', 'batch', '--no-auto', '/dev/vdb', '/dev/vdc', '/dev/vdd', '/dev/vdf', '/dev/vdg', '/dev/vdh', '--yes',
'--no-systemd']
But the OSDs still are created with hdd device class:
ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 0.05878 root default
-3 0.05878 host soc9-ceph
0 hdd 0.00980 osd.0 up 1.00000 1.00000
1 hdd 0.00980 osd.1 up 1.00000 1.00000
2 hdd 0.00980 osd.2 up 1.00000 1.00000
3 hdd 0.00980 osd.3 up 1.00000 1.00000
4 hdd 0.00980 osd.4 up 1.00000 1.00000
5 hdd 0.00980 osd.5 up 1.00000 1.00000
I have tried it with two different indentations:
spec:
crush_device_class: hdd-ec
and as seen above:
crush_device_class: hdd-ec
placement:
label: osd
spec:
According to the docs [0], it's not supposed to be indented, so my
current spec seems valid. But I see in the mgr log with debug_mgr
10 that apparently it is parsed with indentation:
2024-10-03T09:59:23.029+0000 7efef1cc6700 0 [cephadm DEBUG
cephadm.services.osd] Translating DriveGroup
<DriveGroupSpec.from_json(yaml.safe_load('''service_type: osd
service_id: hdd-ec
service_name: osd.hdd-ec
placement:
label: osd
spec:
crush_device_class: hdd-ec
data_devices:
rotational: 1
size: 10G
filter_logic: AND
objectstore: bluestore
'''))> to ceph-volume command
Now I'm wondering how it's actually supposed to work. Yesterday we
saw the same behaviour on a customer cluster as well with Quincy
17.2.7. This is Reef 18.2.2.
Trying to create it manually also doesn't work as expected:
soc9-ceph:~ # ceph orch daemon add osd
soc9-ceph:data_devices=/dev/vdf,crush_device_class=hdd-ec
Created osd(s) 3 on host 'soc9-ceph'
soc9-ceph:~ # ceph osd tree | grep osd.3
3 hdd 0.00980 osd.3 up 1.00000 1.00000
This is in the mgr debug output from the manual creation:
2024-10-03T10:06:00.329+0000 7efeeecc0700 0 [orchestrator DEBUG
root] _oremote orchestrator ->
cephadm.create_osds(*(DriveGroupSpec.from_json(yaml.safe_load('''service_type:
osd
service_name: osd
placement:
host_pattern: soc9-ceph
spec:
crush_device_class: hdd-ec
data_devices:
paths:
- /dev/vdf
filter_logic: AND
objectstore: bluestore
''')),), **{})
2024-10-03T10:06:00.333+0000 7efeeecc0700 0 [cephadm DEBUG
cephadm.services.osd] Processing DriveGroup
DriveGroupSpec.from_json(yaml.safe_load('''service_type: osd
service_name: osd
placement:
host_pattern: soc9-ceph
spec:
crush_device_class: hdd-ec
data_devices:
paths:
- /dev/vdf
filter_logic: AND
objectstore: bluestore
'''))
So parsing the manual command also results in the indented
crush_device_class. Am I doing something wrong here?
Thanks!
Eugen
[0]
https://docs.ceph.com/en/latest/cephadm/services/osd/#advanced-osd-service-specifications
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