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Bug #59395

open

crush-device-class not respected

Added by Brian Woods about 1 year ago. Updated about 1 year ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
% Done:

0%

Source:
Tags:
Backport:
Regression:
No
Severity:
2 - major
Reviewed:
Affected Versions:
ceph-qa-suite:
Pull request ID:
Crash signature (v1):
Crash signature (v2):

Description

I have a pool called CephFS-Erasure-ByOSD-D3F2-Backups, it is set to use the EC profile of Erasure-ByOSD-D3F2-Backups, that profile is set to use the device class of hdd-backups. But after creating and adding data to the pool, it doesn't put any PGs on the hdd-backups class.

# ceph osd pool get CephFS-Erasure-ByOSD-D3F2-Backups erasure_code_profile
erasure_code_profile: Erasure-ByOSD-D3F2-Backups

# ceph osd erasure-code-profile get Erasure-ByOSD-D3F2-Backups
crush-device-class=hdd-backups
crush-failure-domain=osd
crush-root=default
jerasure-per-chunk-alignment=false
k=3
m=2
plugin=jerasure
technique=reed_sol_van
w=8

# rados df
POOL_NAME                             USED   OBJECTS  CLONES     COPIES  MISSING_ON_PRIMARY  UNFOUND  DEGRADED    RD_OPS       RD     WR_OPS       WR  USED COMPR  UNDER COMPR
CephFS-Erasure-ByOSD-D3F2-Backups  6.5 GiB      1692       0       8460                   0        0         0         5    5 KiB       4381   12 GiB         0 B          0 B

# ceph osd df
ID  CLASS        WEIGHT   REWEIGHT  SIZE     RAW USE  DATA     OMAP     META     AVAIL    %USE   VAR   PGS  STATUS
 7  hdd-backups  2.72899   1.00000  2.7 TiB  1.7 GiB   14 MiB    6 KiB  1.8 GiB  2.7 TiB   0.06  0.00    0      up
 8  hdd-backups  2.72899   1.00000  2.7 TiB  517 MiB   14 MiB  5.0 MiB  511 MiB  2.7 TiB   0.02     0    0      up
 9  hdd-backups  2.72899   1.00000  2.7 TiB  2.6 GiB   14 MiB   23 MiB  2.6 GiB  2.7 TiB   0.09  0.00    0      up
10  hdd-backups  2.72899   1.00000  2.7 TiB  1.6 GiB   14 MiB  4.5 MiB  1.6 GiB  2.7 TiB   0.06     0    0      up
22  hdd-backups  3.63869   1.00000  3.6 TiB   15 MiB   14 MiB    1 KiB  8.1 MiB  3.6 TiB      0     0    0      up

All of the PGs are places on the "hdd" crush-device-class.

I have not done additional testing at this point. My next step might be to use a device class without a special character (so "hddbackups" rather than "hdd-backups").

Ceph version 17.2.5.

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 #1

Updated by Brian Woods about 1 year ago

Changing the class from "hdd-backups" to "backups" works around the problem.

There is defiantly an issue in the name processing for rules.

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