JAVA_HOME

[alkersan]

Hi. While playing with simple hadoop cluster setup inside docker containers, I noticed that lots of other software (not only hadoop) relies on $JAVA_HOME variable.
And while this build is responsible for java flavor installation, wouldn't it be reasonable to define JAVA_HOME in Dockerfile via ENV command, for further use?

My thoughts relies on best practices, where ENV usage is proper for "providing variables specific for containterized service"

[pilwon]

@alkersan That's a great idea. Could you submit a PR for this? Thanks.

[XiaoCao1434]

it's importent to deal ENVI,I think at last.