Maintenance: Upgrade of metrics.gwdg.de (Grafana)

Message-Id: 202208171037
Time: Maintenance window Thursday, 18.08.2022, 18:00 – 19:00
Affected: Users of metrics.gwdg.de
Impact: Web-UI (Grafana) of metrics.gwdg.de not accessible

Due to an upgrade of Grafana (v8.5.2 -> v9.0.7) the web interface of metrics.gwdg.de will
not be available for the indicated period of time. The underlying database (InfluxDB) is
not affected by the upgrade and will be available throughout.

An overview of the new features of version v9 can be found here:
https://grafana.com/docs/grafana/latest/whatsnew/whats-new-in-v9-0/