Prometheus - monitoring & time series database
"From metrics to insight
Power your metrics and alerting with a leading
open-source monitoring solution."
"Open source, highly available Prometheus setup with long term storage capabilities."
"The Alertmanager handles alerts sent by client applications such as the Prometheus server. It takes care of deduplicating, grouping, and routing them to the correct receiver integration such as email, PagerDuty, or OpsGenie. It also takes care of silencing and inhibition of alerts."