"is an open-source, MIT licensed, monitoring and alerting system by Stack Exchange. It has an expressive domain specific language for evaluating alerts and creating detailed notifications. It also lets you test your alerts against history for a faster development experience.
...Runs on Linux, Windows, Mac, or any operating system supported by Go (lang)
link from: Four short links: 24 July 2015 - O'Reilly Radar
define:bosun - Google Search
a ship's officer in charge of equipment and the crew.