Dan,

It is not necessary to specify the OSD data in ceph.conf anymore. Ceph has
two auto-start functions besides this method.

udev rules:
ceph uses a udev rule to scan and attempt to mount (and activate)
partitions with specific GUID set for the partition typecode

> sgdisk --typecode=<<partation number>>:<<GUID>> /dev/<<disk>>


the exact GUID's to use can be found
https://github.com/ceph/ceph/blob/master/udev/95-ceph-osd.rules. These are
set automaticly using ceph-disk (or ceph-deploy) if it creates the
partition from an empty disk, in the case that it does not, you have to set
them by hand, all be it should probably do this, or at least tell you
should do this.

ceph init script:
the ceph init script will scan /var/lib/ceph/osd (or the otherwise
configured location) for <cluster name>-<id>  (default cluster name is
ceph) folders and attempt to start the osd service for each of them if they
look correct

lastly, and possibly the most annoying way is that you can configure each
OSD and path in ceph.conf, I don't have any good examples as the two prior
are more flexible / require less config.




On Fri, Aug 8, 2014 at 8:53 AM, O'Reilly, Dan <[email protected]>
wrote:

> Does anybody have a good sample ceph.conf file I can use for reference?
> I’m having a problem where OSD’s won’t come back up after a sysem reboot.
>
>
>
> Dan O'Reilly
>
> UNIX Systems Administration
>
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-- 
Andrew
Mirantis
Ceph community
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