Reliable Insights

A blog on monitoring, scale and operational Sanity

April 13, 2020

How much space does the WAL take up?

The quoted storage numbers for Prometheus are usually for the blocks, not including the WAL.

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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 30, 2020

New Features in Prometheus 2.17.0

Prometheus 2.17.0 is now out, following on from 2.16.0 with many fixes and improvements.

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March 23, 2020

Why info-style metrics have a value of 1

You've seen metrics like prometheus_build_info, but why do they have a value of 1?

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March 16, 2020

Prometheus Middleware for Gorilla Mux

Your HTTP router is usually the best place to measure your application latency.

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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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March 2, 2020

Setting Thresholds on Alerts

Alert thresholds can be surprisingly tricky to get right.

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February 17, 2020

New Features in Prometheus 2.16.0

Prometheus 2.16.0 is now out, following on from 2.15.0 with many fixes and improvements.

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February 10, 2020

Testing SSH of hosts from Consul

We've previously looked at scraping services from consul and ssh checks. How can we combine those?

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February 3, 2020

Get thee to a NaNnary

NaN is just a number in Prometheus.

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