we upgraded from grafana 6.5.0 to 7.0.3.
After the upgrade we have this picture:
- some of the panels of the dashboard show a red exclamation mark with an error 404 page not found
- at the next refresh of the dashboard, it may well be that there is data to be found in those same panels, but not in the panels which were showing data a moment ago
- and this repeats itself
We use a prometheus service as a data source, backed by two prometheus pods (in Kubernetes).
We check the datasource Configuration > data sources > save & test: all green “Data source updated”, “Data source is working”.
Have you seen this problem before?