You are a developer, create applications that generate logs. You would like to monitor those logs to check what the application is doing in production. Or you are an operator in need for information about the whole platform. You need logs from the load balancer, proxy, database and the application. If possible you would like to correlate these logs as well. Maybe you are an analyst and you would like to create some graphs of the data you obtained. If one of these roles is you, the chance is big you heard about ELK. This is short for Elasticsearch, Logstash and Kibana. The goal for these projects is to obtain data (logstash), store it in a central repository (elasticsearch) to make it searchable and available for analysis. Having all this data is nice, but making it visible is even better, that is where Kibana comes in. With Kibana you can create nice dashboard giving insight into your data. ELK is a proven technology stack to handle your logs. During this talk I will present you the complete stack. I’ll show you how to import data with logstash, explain what happens in elasticsearch and create a dashboard using Kibana. I will also discuss some choices you have to make while storing the data, go into a number of possible architectures for the ELK stack. At the end you have a good idea about what ELK can do for you.