Opensource.com - https://opensource.com/article/18/5/building-data-pipeline-elk-stack-ruby
Application logs often contain valuable data. How can we extract this data in a timely and cost-effective way? As a sample app, we will discuss a multi-tenant system where we host multiple sites via subdomains. URLs in log files contain the paths (/api, /search, etc) and params (?foo=bar).