I am new to grafana and have just setup my first dashboard with node_eporter_full template downloaded from the official grafana site.
Now I have set up messenger and want to set the first alarm. Unfortunatelly this does not work on any chart. The message I get is "Template variables are not supported in alert queries"
How can I setup an alert. E.g. if CPU is > 90%?
From https://grafana.com/docs/grafana/latest/alerting/create-alerts/
The query used in an alert rule cannot contain any template variables.
Basically you need to create a query for the thing you're specifically interested in, and then you can create an alert for that.