Bosun is a monitoring framework for time series data. It is developed in popular Go language and works on top of Hadoop cluster file system and OpenTSDB. It is developed by Stack Exchange and is used to provide enhanced level of reporting and monitoring of your HDFS data. Usually, it is pretty easy to setup, you just need to download and run its docker image; but this approach is not recommended for production setups. For production setups and multi node Hadoop clusters, it is always advised to use the non-docker approach to install and configure Bosun.