Grafana is an awesome tool which allows you to visualize your logs. Companies globally are using this awesome project to get a better understanding via visualized logs.
There is just one thing a lot seem to forget when it comes to awesome projects like the Grafana project.
You should always verify if your environment has been secured, meaning who can reach that environment, and what are they allowed to do.
Because after a small Google Dork query, I noticed that you can find dozens of public Grafana projects which have stored and visualized various log files.