we will upgrade InfluxDB from 1.6.4 to 1.7.2  and Grafana from 5.4.1 to 5.4.2 . Because of this, the system will be partly unavailable for a while. We do not expect the maintenance tasks to take longer than an hour in total.
We are sorry for any inconveniences this might cause to you.
With kind regards,
the people of Hiveeyes.