[twunde]

It's a fairly crowded space. Two of the newer monitoring stacks are Prometheus + Grafana and InfluxDB's Tick stack, both of which are metric based monitoring system and tend to be used with containers. Older open source systems include sensu and nagios, which are check-based systems. Sentry and rollbar are examples of exception/error based monitoring systems. There are a number of commercial solutions available that fall into one of these categories