InfluxDB is running on a Raspberry Pi in my home network (with separate attached disk), and I installed a Grafana on top of it, to visualize crucial data.
In Grafana it is possible to define a variable for a dashboard and this variable can query the data source and use the returned list of values. Let’s say the variable is
$host, then the data query can use:
and limit the current dashboard to the selected host. Also the variable will provide a select field at the top of the dashboard, which allows selecting the system one wants to see:
Now usually - according to the documentation - a
SHOW TAG VALUES in the data source should be sufficient However as it is, this did not work for me, and the query came back empty:
Luckily there is a way around with another query:
Grafana ignores the
time column and uses the second column for the host list. Voila.