Docker and CI/CD · Senior · Question 13 of 75

What helps make a Docker build reproducible?

1Running the build twice and keeping the smaller image
2Always using latest so every build uses the same tag
✓Correct answer: Pinned base digests, lockfiles and fixed timestamps

Explanation

Variable inputs (moving tags, unpinned packages, file timestamps) change the output. SOURCE_DATE_EPOCH helps tools produce identical layers.

Further reading

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