Reliable Insights

A blog on monitoring, scale and operational Sanity

August 31, 2020

CPU scheduling metrics from the node exporter

Linux provides scheduling metrics in /proc/schedstat, which the node exporter uses.

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August 17, 2020

CPU frequency scaling metrics from the node exporter

Modern CPUs don't run at one constant frequency.

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August 10, 2020

Using the group() aggregator in PromQL

Prometheus 2.20 added a group aggregator. What is it for?

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August 3, 2020

Linux software RAID metrics from the node exporter

/proc/mdstat is another of the files that the node exporter exposes as metrics.

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July 13, 2020

Time metric from the node exporter

The node exporter exposes the current machine time.

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June 29, 2020

Using Letsencrypt with the node exporter

As of 1.0, the node exporter has experimental support for TLS. This can be hooked up to Letsencrypt.

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May 25, 2020

Conntrack metrics from the node exporter

The node exporter includes metrics about the Linux connection tracking tables.

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May 18, 2020

Atomic Writes and the Textfile Collector

To avoid weirdness, write your files atomically.

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April 6, 2020

Kernel file descriptor metrics from the node exporter

The node exporter provides kernel file descriptor metrics.

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March 9, 2020

Temperature and hardware monitoring metrics from the node exporter

The node exporter exposes the various hardware monitoring metrics of Linux, including temperature, fans, and voltages.

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