I also started with that stack, but swapped out InfluxDB for Postgres + TimescaleDB extension, which adds timeseries workflows (transparent partitioning, compression, data retention, continuous aggregates, …).

I found InfluxDB to be lacking in terms of permissions management, flexibility regarding queries (SQL, joins), data retention, ability to debug problems. In Postgres, for example, I can look into the execution plan of a statement, log long running queries, and so on.

Telegraf as an agent is very flexible; it has input plugins for every task I could want, and besides it’s default „pull workflow“ (checks on defined interval) I also like to push new metrics directly to the Telegraf inputs.socket plugin from my scripts (backup stats, …).

+1 for Telegraf (with Prometheus and Grafana), rolled out a monitoring stack for our internal network in something like 2 days when a colleague had been manually checking `top` for years each morning. Huge benefit.