Placing ARGs in Dockerfiles

Fri, 12 Apr 2024 00:00:00 +0000

In general, Docker’s build caching significantly speeds up image builds. This is especially true for repeated builds of the same image with small changes. It is pretty well known, that every line in a Dockerfile introduces a new Layer that can be cached and reused in a following build if the line in the Dockerfile did not change.

I was just building a image recently where every build took forever, even though I only added new Layers at the end of the Dockerfile. The Dockerfile looked something like this:

Docker on Lukas Panni's Blog

Placing ARGs in Dockerfiles