Re: How to set up bluestore manually?

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Le Mon, 3 Jul 2017 11:30:04 +0000,
Martin Emrich <martin.emrich@xxxxxxxxxxx> a écrit :

> Hi!
> 
> Thanks for the hint, but I get this error:
> 
> [ceph_deploy][ERROR ] ConfigError: Cannot load config: [Errno 2] No
> such file or directory: 'ceph.conf'; has `ceph-deploy new` been run
> in this directory?
> 
> Obviously, ceph-deploy only works if the cluster has been managed
> with ceph-deply all along (and I won’t risk messing with my cluster
> by attempting to “retrofit” ceph-deply to it)… I’ll setup a single VM
> cluster to squeeze out the necessary commands and check back…

No need to start with ceph-deploy in order to use it :)

You can:

create a working directory (e.g. ~/ceph-deploy)
- cd ~/ceph-deploy
- copy the ceph.conf from /etc/ceph/ceph.conf in the working directory
- execute ceph-deploy gatherkeys to obtain the necessary keys

et voilà ;)

Give it a try!

-- Loris

> 
> Regards,
> 
> Martin
> 
> Von: Vasu Kulkarni [mailto:vakulkar@xxxxxxxxxx]
> Gesendet: Freitag, 30. Juni 2017 17:58
> An: Martin Emrich <martin.emrich@xxxxxxxxxxx>
> Cc: ceph-users@xxxxxxxxxxxxxx
> Betreff: Re:  How to set up bluestore manually?
> 
> 
> 
> On Fri, Jun 30, 2017 at 8:31 AM, Martin Emrich
> <martin.emrich@xxxxxxxxxxx<mailto:martin.emrich@xxxxxxxxxxx>> wrote:
> Hi!
> 
> I’d like to set up new OSDs with bluestore: the real data (“block”)
> on a spinning disk, and DB+WAL on a SSD partition.
> 
> But I do not use ceph-deploy, and never used ceph-disk (I set up the
> filestore OSDs manually). Google tells me that ceph-disk does not
> (yet) support splitting the components across multiple block devices,
> I also had no luck while attempting it anyways. (using Ceph 12.1 RC1)
> 
> why not give ceph-deploy a chance, It has options to specify for db
> and wal in command line. you dont have to worry about what options to
> pass to ceph-disk as it encapsulates that
> 
> ex: ceph-deploy osd create --bluestore --block-wal /dev/nvme0n1
> --block-db /dev/nvme0n1 p30:sdb
> 
> 
> 
> I just can’t find documentation on how to set up a bluestore OSD
> manually:
> 
> 
>   *   How do I “prepare” the block, block.wal and block.db
> blockdevices? Just directing ceph-osd to the block devices via
> ceph.conf does not seem to be enough.
>   *   Do bluestore OSDs still use/need a separate journal
> file/device? Or ist that replaced by the WAL?
> 
> http://docs.ceph.com/docs/master/ also has not very much information
> on using bluestore, is this documentation deprecated?
> 
> The document has fallen behind for manual deployment and ceph-deploy
> usage for bluestore as well, but if you use the above command, it
> will clearly throw out what it is doing and how ceph-disk is being
> called, those are essentially manual steps that should go in
> document. I think we have a tracker for update which is pending for
> sometime.
> 
> 
> Thanks for any hints,
> 
> Martin
> 
> 
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