Hi!
done, I just change all the images per code. You are completle right, sorry about that.
The problem (should) be solved now as per my mistake of not realizing what version of logstash I was using (insert "doh" homer gif here).
I will need to deploy again this environment anyways, hopefully with a cleaner idea of what and how to configure things. I'm quite confused with the monitoring part to be honest. I'm guessing once the "legacy" option dissapears, things will be more clear to me.
Thank you very much for your suggestion.