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Deterministic files creation, modification timestamps in docker images #1321

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ppiotrow opened this issue Mar 23, 2020 · 0 comments
Open

Deterministic files creation, modification timestamps in docker images #1321

ppiotrow opened this issue Mar 23, 2020 · 0 comments
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docker feature request

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@ppiotrow
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ppiotrow commented Mar 23, 2020 •
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Expected behaviour

sbt docker:publishLocal always generates files with deterministic file creation and modification timestamps.

Actual behaviour

Now build time is used as files creation&modification timestamps in the final docker image.

Why?

Seems like a good practice to force deterministic builds (JIB faq)
It is very likely that this enables consistent layers caching between different docker build environments as it this thread by @sideeffffect

Links

JIB source code
explaining-docker-image-ids
how-to-digest-a-docker-image
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@muuki88 @ppiotrow