Is completely-reproducible-docker-image-build a goal of this project?

[bglgwyng]

Building docker images with Dockerfile is not reproducible.
In most real-world cases, it's because of RUN commands to execute package manager command inside the container and the behavior of the package manager is sometimes not deterministic.
I think that this fact has made a critical impact on the design of CI/CD solutions.
I wonder if buildkit is going to solve this problem by providing a way of completely reproducible-docker-image-build.

[tonistiigi]

If you mean whether we will remove the capability to run any container during build with RUN because it allows you to generate randomness, including timestamps, then no, this is definitely not the plan.

If instead, you mean if we are open to adding more options, eg. to overwrite the image creation time or reset timestamps when copying files, then yes. For example on LLB layer, we already support setting manual timestamp values on all file operations.