[GitHub] [druid] gianm commented on pull request #10506: Reduce docker image size by half

[GitBox <gi...@apache.org>]

gianm commented on pull request #10506:
URL: https://github.com/apache/druid/pull/10506#issuecomment-708989120


   > @tdt17 can you explain what I'm supposed to be seeing in the docker hub link. I'm not very familiar with this. Thanks!
   
   I think the issue is that the `chown -R druid:druid /opt` line modifies the entire /opt directory, which is large, so the `/bin/sh -c addgroup -S -g` layer in that link is really big. (Docker stores images as a series of layers that are sort of like diffs from the previous layer.) By doing the chown inline with the copy, we eliminate that extra layer.


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