grafana can not start and made an alert in ambari.
[root@compute-1-0 ~]# /usr/sbin/ambari-metrics-grafana restartStopping Ambari Metrics Grafana ...OK
Starting Ambari Metrics Grafana: .... FAILED
and metrics collector process failed in ambari: (see this.)
Connection failed: [Errno 111] Connection refused to compute-1-6.local:6188
Grafana fetches data from AMS collector which runs n default port 6188. So can you please check if From the Grafana Host ambari Metrics Collector Host&port is reachable or not?
Example: From Grafana Host run the following, It will help in isolating two things
1. Grafana Host is able to resolve the hostname "compute-1-6.local" properly. (checking the /etc/hosts entry will help)
2. There is no Firewall issue which is restricting access on port 6188
telnet compute-1-6.local 6188
And from Ambari Metrics Collector Host check if it has the correct hostname and port is opened?
# echo "On AMS host" hostname -f netstat -tnlpa | grep 6188