Netdata [1] is a distributed, real-time, performance and health monitoring tool that can be used to monitor machines running Linux, FreeBSD, and macOS, as well as Kubernetes and Docker. Available for free under a GPLv3 license, you can run Netdata on physical machines, virtual machines, containers, and even on Internet of Things (IoT) devices, thanks to its minimal resource footprint.

Netdata's dashboard balances both form and function and does a nice job of visualizing a computer's processes and services. You can use Netdata to monitor the CPU, RAM usage, disk I/O, and network traffic, along with several other aspects of the systems on which it runs. In addition to hardware, it can also keep an eye on web servers, databases, and applications. Netdata's interactive dashboard can also store long-term historical metrics for days, weeks, or months, all at one second granularity.

Designed by system administrators, DevOps engineers, and developers, Netdata not only visualizes the collected metrics, but it also identifies and troubleshoots complex performance problems without wasting time. In fact, Netdata complements its monitoring features with an alarm notification system that will detect performance and availability issues.

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