Reliable Insights

A blog on monitoring, scale and operational Sanity

June 22, 2020

Remote read and partial failures

What happens when your clustered storage fails?

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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 20, 2020

Don’t federate instance labels

Federation can be quite useful, but it's not replication.

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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 24, 2020

Regex Selectors are a Smell

Have you ever found yourself having to keep on updating and tweaking certain regexes in PromQL?

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December 2, 2019

Target labels, not metric name prefixes

Services are not distinguished by their metric names in Prometheus.

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November 4, 2019

Don’t cross the screams: Monitoring across failure domains

Scraping targets across datacenters will make things better, right?

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September 23, 2019

Laying out Alertmanager routes

How should you design your Alertmanager routes for flexibility and growth?

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September 16, 2019

Looking beyond retention

How can you view older data, while keeping your monitoring reliable?

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September 2, 2019

Cardinality is key

Prometheus performance almost always comes down to one thing: label cardinality.

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