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Use GOTOOLCHAIN to run older versions of the Go toolchain

https://hoelz.ro/blog/use-gotoolchain-to-run-older-versions-of-the-go-toolchain

I've been working through Mastering Distributed Tracing to learn more about (you guessed it) tracing. The book is from 2019, and while I've been assured that its contents are still sufficiently up-to-date, the Go-based code examples are a bit dated; namely, they use dep for dependency management, rather than the new(er) built-in module system. dep seems like a fine tool that had its time, but seeing as I'm used to Go modules, and I don't really want to learn an obsolete tool just for some book...

Discovering your Prometheus via PromQL

https://hoelz.ro/blog/discovering-your-prometheus-via-promql

Knowing about all the metrics available on a Prometheus instance can sometimes feel impossible, so I'd like to share a trick I devised to making exploring those metrics easier!

Blog

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... applications' data, or use your favored programming language's SQLite library. However, oftentimes you'll get ...

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Pages tagged with "favorites"

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... Rob's thoughts on programming and a place for his projects ...

Reference

https://hoelz.ro/ref

This page is the root of the reference section of my site. It's a collection of information I find helpful, and I hope others will find it helpful too. In the future I may grant editing rights to others.

About Me

https://hoelz.ro/about-me

... a programming language or a human one. He's devoted to open-source, loves to exchange knowledge ...

The Case of the Moving Merge Base

https://hoelz.ro/blog/the-case-of-the-moving-merge-base

A while ago, my friend and coworker Matt pinged me with a Git question. He was looking into an issue with a GitHub Actions workflow that only runs on files that changed in a given pull request, and a user reported that it was running against way too many files - so many, in fact, that the workflow was failing because it was exceeding the maximum command line length!

Filtering out nan values with Prometheus

https://hoelz.ro/blog/filtering-out-nan-values-with-prometheus

When writing PromQL, I very rarely run into nan, but when I do, it can be kind of a pain to deal with, since it:

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