Decrease docker image size by 200MB #3540
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Tested with our self-hosted runners, so far so good. |
Copying and then deleting the docker directory in 2 steps (therefore, layers) means the docker directory is still present in the previous layer. We uncompress the docker.tgz in the /tmp directory to be able to copy the docker binaries directly to their target destination.
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200MB saved for each image pull times probably a bazillion pulls == lots of bandwidth saved? 😁
The dockerfile was originally copying and then deleting the docker directory in 2 steps. This creates a "whiteout" that hides the docker directory in the previous layer. Alas, the original docker folder is still present (and takes up space, 200MB to be precise) in the previous layer.
To fix this, we uncompress the docker.tgz in the /tmp directory to be able to copy the docker binaries directly to their target destination.
dive differences: