Download the Telegraf client from influxdata.com, extract the telegraf directory to a sensible place and edit telegraf.conf.

Grafana supports SQL through MySQL/MariaDB, PostgreSQL & SQL Server. Additionally Grafana supports the PostgreSQL extension TimescaleDB, this database is the best fit of all the SQL databases for Grafana since it is built specifically for large-scale time-series datasets.

Log monitoring implies using technology to avoid reading every single log message, with the benefit of catching more interesting events than if you were to read every single line!