You need php 7.0 or higher. I’m developing under a debian 9.13 which uses 7.0.33.
MySQL or MariaDB is used. Here it is running using MariaDB 10.1.47 which works even faster.
Apache 2.4 or higher. You will need the headers and expires modules. And enable ssl.
My own logging server is running using a small VPS with one virtual core and 4GB RAM as its only purpose. Currently 8 servers are constantly logging to it with a minimal load and an average of 2 inserts into mysql per second.
The web gui lggr uses some 3rd party libraries like jquery or bootstrap. These packages are not included in the git sources but referenced to from the main config class.
Most libs are now included by running composer install to load them afterwards from your local vendor path.
The tools and packages used are: