This image is built including the custom output plugin for PostgreSQL, from https://github.com/phemmer/telegraf/tree/postgres
Plugin usage docs can be found at https://github.com/phemmer/telegraf/tree/postgres/plugins/outputs/postgresql
This is a temporary workaround until the official release of Telegraf includes the output plugin.
Telegraf is an open-source agent written in Go for collecting, processing, aggregating, and writing metrics.
Follow the original image readme at https://hub.docker.com/_/telegraf