Bleemeo has published several components of the Bleemeo Cloud based Monitoring product as Open Source projects. The two main projects are Glouton, our agent based on Prometheus and Telegraf and SquirrelDB our Time Series Database based on Cassandra.
Glouton, Open Source Monitoring Agent
Based on Prometheus node exporter and Telegraf
Automatic discover and configuration of services and generate checks and metrics
Can be used as main Prometheus endpoint for another scrapper
Support Nagios checks, nrpe and Statsd metrics ingester
Available as Linux deb and rpm packages for Linux distrubitons, as a Docker container and Windows package
Kubernetes native support creating metrics and checks for pods