[ceph-users] two ways of adding OSDs? LVN vs ceph orch daemon add

[Giuliano Maggi]

Hi,

I am learning about Ceph, and I found this two ways of adding OSDs:

https://docs.ceph.com/en/quincy/install/manual-deployment/#short-form 
 (via 
LVM)
AND
https://docs.ceph.com/en/quincy/cephadm/services/osd/#creating-new-osds 
 (ceph 
orch daemon add osd **:**)

Are these two ways equivalents?

Thanks,
Giuliano,
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[ceph-users] remove spurious data

[Giuliano Maggi]

Hi,

I’d like to remove some “spurious" data:

root@nerffs03:/# ceph df
--- RAW STORAGE ---
CLASS SIZEAVAILUSED  RAW USED  %RAW USED
hdd1.0 PiB  1.0 PiB  47 GiB47 GiB  0
TOTAL  1.0 PiB  1.0 PiB  47 GiB47 GiB  0
 
--- POOLS ---
POOL  ID  PGS  STORED  OBJECTS USED  %USED  MAX AVAIL
.mgr   11  70 MiB   19  209 MiB  0327 TiB
.nfs   3   32   572 B4   36 KiB  0327 TiB
root@nerffs03:/# 

as you can see, there are no data pools.
The 47GiB could be from previous pools/filesystems that I used for testing. 

how can I remove this “spurious” data without affecting the OSDs?
I was checking "ceph-volume lvm zap”, but I am not sure it this is the right 
one.

(I am running ceph version quincy 17.2.7)

Thanks,
Giuliano.
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[ceph-users] ceph-volume lvm new-db throws errors

[Giuliano Maggi]

Hi,

ceph-volume lvm new-db does not work as expected due to missing 
/var/lib/ceph/osd/ceph-OSDID. However, the database device seems to be added to 
the OSD.
Until now, it is unclear to me if the DB device was actually successfully added 
to the OSD or this is a bug in ceph version 17.2.7

The detailed explanation  is in a github ticket: 
https://github.com/ceph/ceph/pull/52941#issuecomment-1814251890

does anyone else have this issue ?
Any feedback is welcome of course.

Thanks,
Giuliano.


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