Grant privileges and roles needed to read Packetbeat data from Kibana

Kibana users typically need to view dashboards and visualizations that contain Packetbeat data. These users might also need to create and edit dashboards and visualizations.

To grant users the required privileges:

1. Create a reader role, called something like packetbeat_reader, that has the following privilege:

   Type	Privilege	Purpose
   Index	read on packetbeat-* indices	Read data indexed by Packetbeat
   Spaces	Read or All on Dashboards, Visualize, and Discover	Allow the user to view, edit, and create dashboards, as well as browse data.

2. Assign the reader role, along with the following built-in roles, to users who need to read Packetbeat data:

   Role	Purpose
   monitoring_user	Allow users to monitor the health of Packetbeat itself. Only assign this role to users who manage Packetbeat.