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InfluxDB-Grafana-Telegraf

1. influx update breaks config !!! Apt hold influx (+grafana?)
   https://schroederdennis.de/tutorial-howto/proxmox-monitoring-einrichten-installieren-influxdb-grafana/
   https://www.howtoforge.com/tutorial/how-to-install-tig-stack-telegraf-influxdb-and-grafana-on-ubuntu-1804/
   https://foldingforum.org/viewtopic.php?f=14&t=35660
2. HDD Temps Telegraf (install hddtemp daemon!) https://wiki.ubuntuusers.de/hddtemp/
   https://github.com/influxdata/telegraf/tree/master/plugins/inputs/hddtemp
3. Add problematic smart stats manually: https://askubuntu.com/questions/474669/ssd-temperature-sensor-readout-with-hddtemp
   https://github.com/influxdata/telegraf/blob/master/plugins/inputs/disk/README.md
   https://stackoverflow.com/questions/45171907/influxdb-how-to-update-duration-of-an-existing-database
4. Format Dircount as influx out: https://www.reddit.com/r/grafana/comments/os96l1/influxdbtelegraf_exec_display_issues/h6n6pc6/?context=3
5. add telegraf user to nextcloud group in order to be able to scan directories. https://du.nkel.dev/blog/2021-05-05_proxmox_influxdb/
   https://towardsdatascience.com/influxdb-data-retention-f026496d708f
6. Delete old data in influx
   use DATABASE +
   https://stackoverflow.com/questions/38587898/in-influxdb-how-to-delete-all-measurements
7. Countdirectories
   Befehl in /usr/bin/countdirectories anlegen:

#!/bin/sh
count=$(ls -l $1 | grep -c ^d)
echo dircount,path=$1 value=$count