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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, example configuration:

config.providers=env

config.providers.env.class=org.apache.kafka.common.config.provider.EnvVarConfigProvider

ssl.key.password=${env:

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KEY_PASSPHRASE}

Public Interfaces

A new implementation of the interface org.apache.kafka.common.config.provider.ConfigProvider will be added.

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A class EnvVarConfigProvider implementing the ConfigProvider interface will be added. Core functionality is to provide the map returned by System.getEnv() via the get methods of the ConfigProvider.

Example implementation: https://github.com/Schm1tz1/kafka-config-provider-env-var was already added to https://github.com/Schm1tz1/kafka/tree/kip-887

Compatibility, Deprecation, and Migration Plan

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