Re: ceph-osd - No Longer Creates osd.X upon Launch - Bug ?

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On Thu, Feb 05, 2015 at 08:33:39AM -0700, Ron Allred wrote:
> Hello,
> 
> The latest ceph-osd in Firefly v0.80.8, no longer auto creates its osd.X
> entry, in the osd map, which it was assigned via ceph.conf.
> 
> I am very aware documentation states "ceph osd create", can do this job,
> but this command only assigns the next sequential osd.X number.  This is
> highly undesirable.  For _years_, we have assigned number ranges to each
> OSD server for an organized multi-tier (SSD / SAS / SATA) crush map.
> (leaving gaps in osd numbering, naturally.)  Skipping 'ceph osd create'
> entirely.
> 
> We are now facing a problem that an OSD remove+replace, now can't use
> it's former osd.X ID.  Making a huge mess of documentation, number
> patterning, and disk labeling.
> 
> Is there a work-around to forcefully create an osd.X number??

The "ceph osd create" could be extended to have OSD ID as a second
optional argument (the first is already used for uuid).
 
  ceph osd create <uuid> <id>

The command would succeed only if the ID were not in use.

Ron, would this work for you?

I have a patch as a proof of concept:

https://github.com/trociny/ceph/compare/wip-osd_create

-- 
Mykola Golub
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