Hello && Welcome @ThomasMichel
I moved your post to Graylog Central and kept your tags for pipeline. The other category is for displaying examples and templates for others to use.
Need to ask a couple questions…
- What version of software are you using ( elasticsearch, graylog, operating System)?
- Do you have a example of what’s been tried?
Best suggestion is to search the forum on what you want (i.e. here), try it out and post back here. Not only what was tried but what the output was. This would give a better idea to troubleshoot any issues.
Place to look
Last, here are some examples to help