Reliable Insights

A blog on monitoring, scale and operational Sanity

December 10, 2018

Checking OpenMetrics output is valid

The Python client can be used to check if a given metrics output is valid OpenMetrics format.

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December 3, 2018

How to check your prometheus.yml is valid

It's nice to check that your configuration is valid before pushing to production.

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November 26, 2018

Unit testing alerts with Prometheus

In the previous post we looked at testing rules. You can also test alerts.

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November 19, 2018

Unit testing rules with Prometheus

As of 2.5.0, promtool has a feature to allow you to test your recording rules.

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November 12, 2018

New Features in Prometheus 2.5.0

Prometheus 2.5.0 is now out, following on from 2.4.0 back in September with many fixes and improvements.

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November 5, 2018

Probing DNS servers with the Blackbox exporter

Among the Blackbox exporter's probe types is DNS.

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October 29, 2018

How many metrics should an application return?

While each application is different, a rough idea of how many metric there should be would be useful.

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October 22, 2018

Debugging Blackbox exporter failures

Ever wanted more information about Blackbox probe failures?

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October 15, 2018

Graph top N time series in Grafana

As of Grafana 5.3.0 there's a feature that allows correct graphing of the top N series over a duration.

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October 8, 2018

Checking for HTTP 200s with the Blackbox Exporter

It's easy to check if HTTP and HTTPS endpoints are working with the Blackbox Exporter.

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