Reliable Insights

A blog on monitoring, scale and operational Sanity

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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January 27, 2020

Getting metrics from Apache logs using the grok exporter

Not all applications produce useful metrics, but some of them do produce logs.

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January 20, 2020

Graphite’s summarize and smartSummarize in PromQL

How do you convert summarizeinto PromQL?

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January 13, 2020

Optimising index memory usage for blocks

One of the big changes in Prometheus 2.15.0 was reduced memory usage for indexes.

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January 6, 2020

Network interface metrics from the node exporter

Along with many others, the node exporter exposes network interface metrics.

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December 30, 2019

Left joins in PromQL

Just because SQL isn't in the name doesn't mean that you can't do SQL-like joins with PromQL.

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December 23, 2019

New Features in Prometheus 2.15.0

Prometheus 2.15.0 is now out, following on from 2.14.0 with many fixes and improvements.

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December 16, 2019

CC and BCC in Alertmanager emails

If you look at the documentation, the Alertmanager has a to field, but nothing for CC or BCC. So how do you do those?

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December 9, 2019

PromQL Subqueries and Alignment

Subqueries were added to PromQL a while back, but there's more to this feature than it'd seem.

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