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? What exactly is the purpose of this service. The documentation oncontains very rare information about it. 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