Reliable Insights

A blog on monitoring, scale and operational Sanity

June 1, 2020

Debugging out of order samples

How do you debug and resolve the "Error on ingesting out-of-order samples" warning from Prometheus?

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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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May 11, 2020

New Features in Prometheus 2.18.0

Prometheus 2.18.0 is now out, following on from 2.17.0 with many fixes and improvements.

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May 4, 2020

Or in relabelling

How do you allow for the keep relabel action halting relabelling for things not kept?

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April 27, 2020

Numbers from DisplayStrings with the snmp_exporter

Not all numbers in SNMP are exposed as numbers, which is why regex_extracts exists.

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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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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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