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.. _ceph-manager-daemon:
===================
Ceph Manager Daemon
===================
The :term:`Ceph Manager` daemon (ceph-mgr) runs alongside monitor daemons,
to provide additional monitoring and interfaces to external monitoring
and management systems.
Since the 12.x (*luminous*) Ceph release, the ceph-mgr daemon is required for
normal operations. The ceph-mgr daemon is an optional component in
the 11.x (*kraken*) Ceph release.
By default, the manager daemon requires no additional configuration, beyond
ensuring it is running. If there is no mgr daemon running, you will
see a health warning to that effect, and some of the other information
in the output of `ceph status` will be missing or stale until a mgr is started.
Use your normal deployment tools, such as ceph-ansible or cephadm, to
set up ceph-mgr daemons on each of your mon nodes. It is not mandatory
to place mgr daemons on the same nodes as mons, but it is almost always
sensible.
.. toctree::
:maxdepth: 1
Installation and Configuration <administrator>
Writing modules <modules>
Writing orchestrator plugins <orchestrator_modules>
Dashboard module <dashboard>
Ceph RESTful API <ceph_api/index>
Alerts module <alerts>
DiskPrediction module <diskprediction>
Local pool module <localpool>
RESTful module <restful>
Zabbix module <zabbix>
Prometheus module <prometheus>
Influx module <influx>
Hello module <hello>
Telegraf module <telegraf>
Telemetry module <telemetry>
Iostat module <iostat>
Crash module <crash>
Insights module <insights>
Orchestrator module <orchestrator>
Rook module <rook>
MDS Autoscaler module <mds_autoscaler>
NFS module <nfs>
CLI API Commands module <cli_api>
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