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https://issues.apache.org/jira/browse/KAFKA-14376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17632383#comment-17632383
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Chris Egerton commented on KAFKA-14376:
---------------------------------------

[~Schm1tz1] this sounds like a useful improvement! Just so you know, a KIP will 
have to be proposed and accepted before we can merge this change. You can read 
more on the KIP process 
[here|https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals#KafkaImprovementProposals-GettingStarted].

> Add ConfigProvider to make use of environment variables
> -------------------------------------------------------
>
>                 Key: KAFKA-14376
>                 URL: https://issues.apache.org/jira/browse/KAFKA-14376
>             Project: Kafka
>          Issue Type: Improvement
>          Components: config
>            Reporter: Roman Schmitz
>            Priority: Minor
>              Labels: needs-kip
>
> So far it is not possible to inject additional configurations stored in 
> environment variables. This topic came up in several projects and would be a 
> useful feature to have as a Kafka config feature similar to file/directory 
> providers, e.g.:
> {{config.providers=env}}
> {{}}
> {{config.providers.env.class=org.apache.kafka.common.config.provider.EnvVarConfigProvider}}
> {{{}ssl.key.password=${env:<...>:KEY_PASSPHRASE}{{}}}}



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