As part of a log file monitoring tool, I implemented a file tailer that keeps reading new lines from log files. This turned out to be much more challenging than I thought, especially because it should run on multiple operating systems and it should be robust against logrotate. In this 20 Minutes talk I will present the lessons learned, the pitfalls and dead-ends I ran into.

The monitoring tool is https://github.com/fstab/grok_exporter

Slides: https://goo.gl/9ABX2R (docs.google.com)