Not with creating the connection myself, but I have worked on applications that fed their data to an ELK-stack (the K = Kibana). One was a PHP-application, the second is a Mendix application that is hosted on SAP Cloud environment, on a S/4 HANA database. So the creators of the SAP Cloud surely have experience sending the log to Kibana. More on this here: https://docs.mendix.com/developerportal/operate/logs#4-apps-on-sap-cloud-platform, more on how they did it here: https://docs.mendix.com/partners/sap/sap-logger and it may be useful to have a look at the AppStore connector https://appstore.home.mendix.com/link/app/110219/.