You could add your grafana-server logs to Loki, and then alert on loki queries that search for specific errors. If I understand your intent, then you’ll need to get the grafana-server logs into Grafana via some datasource. And if so, Loki makes the most sense to me.
thanks for your reply. I’ll keep “Loki” in mind for more complex use cases.
For the time being, it is “too much” for me to set up Loki and to create a further dashboard just to get Grafana error notifications. I was looking for a simpler, more leight-weigth solution.
Meanwhile, I solved it by setting up a cronjob/Jenkins-job which runs e.g. hourly and executes a docker logs <grafana-container> --since 1h. In case it contains a string like lvl=eror, I send a email notification.