Troubleshooting¶

If Grafana contains no data, use the following troubleshooting tips:

Verify that the StackLight Collector is running properly by following the troubleshooting instructions in the StackLight Collector Fuel plugin documentation.
Verify that the nodes are able to connect to the InfluxDB cluster through the VIP address (See the Verify InfluxDB section for instructions on how to get the InfluxDB cluster VIP address) on port 8086:
```
root@node-2:~# curl -I http://<VIP>:8086/ping
```
The server should return a 204 HTTP status:
```
HTTP/1.1 204 No Content
Request-Id: cdc3c545-d19d-11e5-b457-000000000000
X-Influxdb-Version: 0.10.0
Date: Fri, 12 Feb 2016 15:32:19 GMT
```

Verify that InfluxDB cluster VIP address is up and running:

root@node-1:~# crm resource status vip__influxdb
resource vip__influxdb is running on: node-1.test.domain.local

Verify that the InfluxDB service is running on all nodes of the cluster:

root@node-1:~# service influxdb status
influxdb Process is running [ OK ]

If the InfluxDB service is not running, restart it:

root@node-1:~# service influxdb start
Starting the process influxdb [ OK ]
influxdb process was started [ OK ]

Verify that the Grafana server is running:

root@node-1:~# service grafana-server status
* grafana is running

If the Grafana server is not running, restart it:

root@node-1:~# service grafana-server start
* Starting Grafana Server

If none of the above solves the issue, look for errors in the following log files:
- InfluxDB – /var/log/influxdb/influxdb.log
- Grafana – /var/log/grafana/grafana.log