System for monitoring and reporting errors - free/opensource?

Question

Monitoring

The task is this - there is a web server that writes application error messages to the error log. There is quite a lot of any information of varying degrees of importance in the error logs. The task is to make a system based on this that will collect, generalize / group these error data, allow you to view the details of the error, draw graphs and, if necessary, send messages about new / critical errors.
There is an option to do something quickly and on the knee, but maybe there are some standard and free tools for this?
We tried to do this on the basis of the Elastic Stack, with which we process accesslogi, but it is not quite suitable for errorlog, and besides, monitoring / reporting there is made by a separate and paid (and very paid) module.

Answer 1

Look towards Kibana , used at one time, it was extremely convenient. There is even a demo