Did you figure this out? Are you using the sample alerting dashboard: https://grafana.com/dashboards/1962
As you noticed, alerting is only possible from the graph panel.
- Configure notification channels first if you have not done so before.
- Create a graph panel. Set unit to percent for left Y-axis on Axes tab.
- Copy the query from the Ping Packet Loss singlestat:
averageSeries(worldping.$endpoint.$probe.ping.loss) and substitute the variables for server names. An example:
- Set up an alert
- Save the dashboard to enable the alert.