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https://issues.apache.org/jira/browse/SPARK-20379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcelo Vanzin closed SPARK-20379.
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Resolution: Not A Problem
Just remembered that in 2.x (2.1 at least) users can reference env variables
from the configuration, so they can achieve this without the need for extra
code in Spark.
> Allow setting SSL-related passwords through env variables
> ---------------------------------------------------------
>
> Key: SPARK-20379
> URL: https://issues.apache.org/jira/browse/SPARK-20379
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.2.0
> Reporter: Marcelo Vanzin
>
> Currently, Spark reads all SSL options from configuration, which can be
> provided in a file or through the command line. This means that to set the
> SSL keystore / trust store / key passwords, you have to use one of those
> options.
> Using the command line for that is not secure, and in some environments
> admins prefer to not have the password written in plain text in a file (since
> the file and the data it's protecting could be stored in the same
> filesystem). So for these cases it would be nice to be able to provide these
> passwords through environment variables, which are not written to disk and
> also not readable by other users on the same machine.
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