I've built one of these types of systems without a lot of that technology stack. I have my own dashboard, use in-process HSQLDB for the back end, and have a dep

I've built one of these types of systems without a lot of that technology stack. I have my own dashboard, use in-process HSQLDB for the back end, and have a deployment process build around uberjars, shell scripts, and init scripts. https://github.com/mschaef/metlog https://github.com/mschaef/metlog There are reasons I made the choices I did, and I think they still make sense, but there's been enough of various sorts of implementation pain that I am absolutely sympathetic to the idea that this person used some off the shelf software. You should probably be more aware of your target's constraints and goals before you start questioning the means they used to achieve them.