Mate Czagany created FLINK-34439:
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             Summary: Move chown operations to COPY commands in Dockerfile
                 Key: FLINK-34439
                 URL: https://issues.apache.org/jira/browse/FLINK-34439
             Project: Flink
          Issue Type: Improvement
          Components: Kubernetes Operator
            Reporter: Mate Czagany


We can lower the size of the output operator container image if we don't run 
'chown' commands in seperate RUN commands inside the Dockerfile, but instead 
use the '--chown' argument of the COPY command.

Using 'RUN chown...' will copy all the files affected with their whole size to 
a new layer, duplicating the previous files from the COPY command.

Example:
{code:java}
$ docker image history ghcr.io/apache/flink-kubernetes-operator:ccb10b8
...
<missing>     3 months ago  RUN /bin/sh -c chown -R flink:flink $FLINK...  
116MB       buildkit.dockerfile.v0
... {code}
This would mean a 20% reduction in image size.



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