Recent Articles

Finding Long-Running Queries in PostgreSQL

Nov 26, 2021 · 2 min read

Poorly optimized queries and excessive connections can cause problems in PostgreSQL, here's a quick way to identify and kill them.

databases postgres

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Calculating Table Size in PostgreSQL

Nov 26, 2021 · 2 min read

Knowing how much disk space individual tables take up is important for DB maintenance and debugging, and it can be accomplished with a single query in PostgreSQL.

databases postgres

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Reliably Finding Files in $PATH

Aug 27, 2021 · 4 min read

Most built-in commands commonly used to find files in $PATH don't always work quite as expected, or are shell-specific.

shell

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How to Persist Docker Build Arguments as Environment Variables

Aug 22, 2021 · 3 min read

Values from the Docker ARG instruction aren't persisted in built images, so here's a quick tip on how to persist them!

docker

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Docker Shell vs. Exec Form

Mar 22, 2021 · 4 min read

The RUN, ENTRYPOINT, and CMD, instructions all have two different forms they can be written in, and those forms change how each of those instructions behaves.

docker shell

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You Don't Need an Init System for Node.js in Docker

Mar 20, 2021 · 5 min read

But you do need to think about how your application handles exit signals.

docker node.js shell

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Publishing Docker Images with GitHub Actions

Feb 20, 2021 · 7 min read

Publishing Docker images is a common CI/CD task, and the tight integration GitHub Actions has with GitHub repositories makes it a great tool for the job.

ci-cd docker github

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Publishing Docker Images with CircleCI

Feb 15, 2021 · 8 min read

Publishing Docker images is a common CI/CD task, and the flexibility CircleCI offers makes it a great tool for the job.

ci-cd docker

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Changing a Git Commit Message

Dec 5, 2020 · 6 min read

The Git commands to change a commit message are situational - here's a short guide to all of them.

git github

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Undoing a Git Commit

Dec 3, 2020 · 5 min read

Complicated Git commands are hard to remember and are full of landmines - here's a short guide on how to undo any Git commit.

git github

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Installing a Specific Version of Helm

Nov 24, 2020 · 4 min read

Helm, the package manager for Kubernetes, can be sensitive to the version of Tiller running in cluster, and as a result may require you to install a specific version.

kubernetes

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Making UUIDs More Performant in MySQL

Nov 14, 2020 · 3 min read

MySQL does not have a native UUID type, so strings are often used instead, which come with large storage and performance costs.

databases mysql