I wan to install two metrics grafana in two different nodes for high availibility. I haven't tried it but looking some references and experts advise.
Currently only the Ambari Metrics Collector HA functionality is available. https://docs.hortonworks.com/HDPDocuments/Ambari-188.8.131.52/bk_ambari-operations/content/ams_high_avail...
There is no out of the box solution available to implement Grafana HA from Ambari side.