doc/mgr: name data source in "Man Install & Config"

This PR specifies that the data source must be set to
be "Dashboard1" when you configure Grafana and Prometheus
manually.

This is a fixup of another PR which was created by Dr
Jake Grimmett. This is that PR:

Credit goes to Dr Jake Grimmett of Cambridge.

https://github.com/ceph/ceph/pull/44150/

Signed-off-by: Zac Dover <zac.dover@gmail.com>
(cherry picked from commit 987713da331e941c05d114f1e167c21d1e7896eb)

diff --git a/doc/mgr/dashboard.rst b/doc/mgr/dashboard.rst
index 393063e05fd3901dae2a3b8f77c82808aad56e5f..e0edf1c1984a078253841265360c38f21805002c 100644 (file)
--- a/doc/mgr/dashboard.rst
+++ b/doc/mgr/dashboard.rst
@@ -561,8 +561,10 @@ on appropriate hosts, proceed with the following steps.
       services run on a manager host will be restarted automatically on a different
       manager host if one Ceph Manager goes down.
 
-#.  Add Prometheus as data source to Grafana `using the Grafana Web UI
-    <https://grafana.com/docs/grafana/latest/features/datasources/add-a-data-source/>`_.
+#. Add Prometheus as data source to Grafana `using the Grafana Web UI <https://grafana.com/docs/grafana/latest/features/datasources/add-a-data-source/>`_.
+
+   .. IMPORTANT:: 
+      The data source must be named "Dashboard1".
 
 #.  Install the `vonage-status-panel and grafana-piechart-panel` plugins using: