On Wed, Jun 14, 2017 at 6:47 AM, Manuel Lausch <manuel.lausch@xxxxxxxx> wrote:
> Hi,
>
> we decided to test a bit the upcoming ceph release (luminous). It seems
> that I need to install this ceph-mgr daemon as well. But I don't
> understand exactly why I need this service and what I can do with it.
>
> The ceph Cluster is working well without installing any manager daemon.
> However in the ceph status output there is a health error ("no active
> mgr")
>
> My questions:
> Can we run the cluster without this additional daemon? If yes, is it
> possible to supress this health error?
You do need the daemon -- in luminous, it is responsible for
populating parts of the health monitoring, especially the status of
PGs.
> What exactly is the purpose of this service. The documentation oncontains
> very rare information about it.
You probably already found the existing doc page for mgr:
"The Ceph Manager daemon (ceph-mgr) runs alongside monitor daemons, to
provide additional monitoring and interfaces to external monitoring
and management systems."
I've fleshed it out a little bit: https://github.com/ceph/ceph/pull/15690
John
>
>
> Regards
> Manuel
>
>
>
>
>
> --
> Manuel Lausch
>
> Systemadministrator
> Cloud Services
>
> 1&1 Mail & Media Development & Technology GmbH | Brauerstraße 48 |
> 76135 Karlsruhe | Germany Phone: +49 721 91374-1847
> E-Mail: manuel.lausch@xxxxxxxx | Web: www.1und1.de
>
> Amtsgericht Montabaur, HRB 5452
>
> Geschäftsführer: Frank Einhellinger, Thomas Ludwig, Jan Oetjen
>
>
> Member of United Internet
>
> Diese E-Mail kann vertrauliche und/oder gesetzlich geschützte
> Informationen enthalten. Wenn Sie nicht der bestimmungsgemäße Adressat
> sind oder diese E-Mail irrtümlich erhalten haben, unterrichten Sie
> bitte den Absender und vernichten Sie diese E-Mail. Anderen als dem
> bestimmungsgemäßen Adressaten ist untersagt, diese E-Mail zu speichern,
> weiterzuleiten oder ihren Inhalt auf welche Weise auch immer zu
> verwenden.
>
> This e-mail may contain confidential and/or privileged information. If
> you are not the intended recipient of this e-mail, you are hereby
> notified that saving, distribution or use of the content of this e-mail
> in any way is prohibited. If you have received this e-mail in error,
> please notify the sender and delete the e-mail.
>
> _______________________________________________
> ceph-users mailing list
> ceph-users@xxxxxxxxxxxxxx
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
