Reliable Insights

A blog on monitoring, scale and operational Sanity

June 4, 2018

Will using Prometheus instrumentation clients lock me in?

Considering using Prometheus, but worried about committing to using our clients?

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May 28, 2018

Extracting raw samples from Prometheus

Sometimes you want the raw samples inside Prometheus for analysis or debugging. How do you get that?

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May 21, 2018

New Features in Node Exporter 0.16.0

Node exporter 0.16.0 is out, and with some big changes. Let's take a look.

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May 14, 2018

Converting string states to booleans with the JMX exporter

You may have come across a mBean attribute with a value such as STARTED or RUNNING. How do you convert that to a more useful boolean metric?

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May 7, 2018

Exposing version numbers with the JMX exporter

While the JMX attributes you are usually working with will be numbers, the JMX exporter also has support for strings.

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April 30, 2018

Identifying expensive alerting rules

Since Prometheus 2.1 there is a feature to view alerting rule evaluation times in the rules UI. In this blogpost we'll see an example of how this can be used to identify an expensive rule expression.

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April 23, 2018

Why can count(x > 5) not return 0?

When using the count aggregation operator you may have noticed that it sometimes returns nothing rather than 0. Why is this?

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April 16, 2018

When to Alert with Prometheus

Alerting is an art. One must be sure to alert just enough to be aware of all problems arising in the monitored system while at the same time not drown out the signal with excess noise. In this blogpost we'll explain some of the best practices to use when alerting with Prometheus.

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April 9, 2018

Using Geohashes with the Worldmap Panel and Prometheus

Wouldn't it be nice to have arbitrary locations on the Worldmap panel?

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April 2, 2018

Using the Worldmap Panel with Prometheus

The Worldmap Panel for Grafana allows displaying of metrics on a map.

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