Re: Multiple MDS servers...

[JIten Shah <jshah2005@xxxxxx>]

I have been trying to do that for quite some time now (using puppet) but ti keeps failing. Here’s what the error says.

Error: Could not start Service[ceph-mds]: Execution of '/sbin/service ceph start mds.Lab-cephmon003' returned 1: /etc/init.d/ceph: mds.Lab-cephmon003 not found (/etc/ceph/ceph.conf defines mon.Lab-cephmon003 , /var/lib/ceph defines mon.Lab-cephmon003)

Wrapped exception:

Execution of '/sbin/service ceph start mds.Lab-cephmon003' returned 1: /etc/init.d/ceph: mds.Lab-cephmon003 not found (/etc/ceph/ceph.conf defines mon.Lab-cephmon003 , /var/lib/ceph defines mon.Lab-cephmon003)

Error: /Stage[main]/Ceph::Mds/Service[ceph-mds]/ensure: change from stopped to running failed: Could not start Service[ceph-mds]: Execution of '/sbin/service ceph start mds.Lab-cephmon003' returned 1: /etc/init.d/ceph: mds.Lab-cephmon003 not found (/etc/ceph/ceph.conf defines mon.Lab-cephmon003 , /var/lib/ceph defines mon.Lab-cephmon003)

On Dec 9, 2014, at 3:12 PM, Christopher Armstrong <chris@xxxxxxxxxxxx> wrote:

JIten,

You simply start more metadata servers. You'll notice when you inspect the cluster health that one will be the active, and the rest will be standbys.

Chris

On Tue, Dec 9, 2014 at 3:10 PM, JIten Shah <jshah2005@xxxxxx> wrote:

Hi Greg,

Sorry for the confusion.  I am not looking for active/active configuration which I know is not supported but what documentation can I refer to for installing an active/stndby MDSes ?

I tried looking on Ceph.com but could not find that explains how to setup an active/standby MDS cluster.

Thanks.

—Jiten

On Dec 9, 2014, at 12:50 PM, Gregory Farnum <greg@xxxxxxxxxxx> wrote:

> You'll need to be a little more explicit about your question. In
> general there is nothing special that needs to be done. If you're
> trying to get multiple active MDSes (instead of active and
> standby/standby-replay/etc) you'll need to tell the monitors to
> increase the mds num (check the docs; this is not recommended right
> now). You obviously need to add an MDS entry to one of your nodes
> somewhere, the mechanism for which can differ based on how you're
> managing your cluster.
> But you don't need to do anything explicit like tell everybody
> globally that there are multiple MDSes.
> -Greg
>
> On Mon, Dec 8, 2014 at 10:48 AM, JIten Shah <jshah2005@xxxxxx> wrote:
>> Do I need to update the ceph.conf  to support multiple MDS servers?
>>
>> —Jiten
>>
>> On Nov 24, 2014, at 6:56 AM, Gregory Farnum <greg@xxxxxxxxxxx> wrote:
>>
>>> On Sun, Nov 23, 2014 at 10:36 PM, JIten Shah <jshah2005@xxxxxx> wrote:
>>>> Hi Greg,
>>>>
>>>> I haven’t setup anything in ceph.conf as mds.cephmon002 nor in any ceph
>>>> folders. I have always tried to set it up as mds.lab-cephmon002, so I am
>>>> wondering where is it getting that value from?
>>>
>>> No idea, sorry. Probably some odd mismatch between expectations and
>>> how the names are actually being parsed and saved.
>>> -Greg
>>> _______________________________________________
>>> ceph-users mailing list
>>> ceph-users@xxxxxxxxxxxxxx
>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>

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