Detecting Attacks

Hello, I am Subashini, a graduate student. I am interested in doing my project in Network Security. I have a doubt related to it. The aim is to detect DoS/DDoS attacks using the application. I am going to use ELK (ElasticSearch, Logstash, Kibanna) for processing the logs (Log Analytics). My doubt is regarding how do we generate logs for detecting this attack? As I am new to this process, I am not sure about it. Also, if it is possible to do any other attacks similar to this, you can please give a hint about it. Could anyone please help with this, it would be a great help!! -- Thank You. With Regards, H.Subashini