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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>
+    RGW module <rgw>
+    MDS Autoscaler module <mds_autoscaler>
+    NFS module <nfs>
+    Progress Module <progress>
+    CLI API Commands module <cli_api>