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 ceph-deploy, 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 plugins <plugins>
+ Balancer plugin <balancer>
+ Dashboard plugin <dashboard>
+ Local pool plugin <localpool>
+ RESTful plugin <restful>
+ Zabbix plugin <zabbix>
+ Prometheus plugin <prometheus>
+ Influx plugin <influx>