The following diagram shows its relation to nodes, Prometheus Node Exporter and Prometheus: Hence, collectors also represent a metric or a set of metrics. It is essentially the code written to collect data of a metric, an example of a metric is “CPU core usage”, or a set of metrics. Default & Optional CollectorsĪ collector is a part of an exporter. A Node Exporter is needed on all servers or virtual machines to collect data on all nodes Node Exporter exposes metrics on ‘/metrics’ sub-path on port 9100. Node Exporter measures multiples metrics such as: MemoryĪll of this information is exceedingly useful for monitoring node (or server) performance. Prometheus Node Exporter provides hardware and OS-level system metrics exposed by *NIX kernels through metric collectors. However, node-level metrics are not provided. Most Kubernetes clusters expose cluster-level server metrics and container-level metrics. There is a vast library of applications that can export metrics from third parties and transform them into Prometheus metrics that list can be found here. XML), convert those statistics into metrics that Prometheus can utilize, and then expose them on a Prometheus-friendly URL. What is Prometheus Node Exporter?Ī Prometheus Exporter can fetch statistics from an application in the format used by that system (i.e. In this article, we’ll get familiar with Node Exporter, its prerequisites needed for installation, and how to configure it for Kubernetes. Prometheus Node Exporter can more specifically be used to get node metrics and system-level insights. These tools specifically provide node and container statistics, which allow developers to analyse real-time metrics of containers and nodes. Prometheus, Grafana, and Node Exporters are commonly used together in Kubernetes to monitor system-level application insights.
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