https://riemann.io

https://github.com/riemann/riemann

https://riemann.io/quickstart.html
https://riemann.io/concepts.html
https://riemann.io/clojure.html
    https://aphyr.com/posts/301-clojure-from-the-ground-up-welcome
    https://aphyr.com/posts/302-clojure-from-the-ground-up-basic-types
    https://aphyr.com/posts/303-clojure-from-the-ground-up-functions
https://riemann.io/howto.html

https://riemann.io/api.html