How to accelerate docker build? – Questions / Help

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Hi all,

I’m maintaining a faily large Elixir project (100 direct dependencies, 177MB deps, 554 source files, 56MB _build/dev).

I release it as a docker image.

My issue is that docker build is very long as it has to download dependencies, build dependencies, build sources, each time.

I’m looking for tips to accelerate this step, maybe using cache, since dependencies do not vary much and sources are largely the same from one build to the next.

I already reordered instruction to avoid docker cache invalidation if nothing changes (as explained here). But if only a tiny piece is change (eg: new version of a deps), the whole layer is invalidated.

Any idea ?



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