JulianJaffePinterest opened a new issue #8685: Allow bootstrap.servers to be provided via a PasswordProvider for Kafka Ingestion URL: https://github.com/apache/incubator-druid/issues/8685 ### Description Currently, the `consumerProperties` map in a KafkaSupervisorIOConfig can use PasswordProviders for the `keystore`, `truststore` and `key` properties, but `bootstrap.servers` must be a hard-coded String. Although `bootstrap.servers` is not a password, it would be helpful if the value for this property could be provided via a similar mechanism to a PasswordProvider. This would allow SupervisorSpecs to be robust to changes in the Kafka bootstrap servers in the event of a cluster migration or the like. ### Motivation Currently, if the bootstrap servers for a Kafka cluster change, running supervisor specs that refer to those bootstrap servers must be manually killed and relaunched with references to the new bootstrap servers. If a cluster operator has access to a separate system that can provide updated bootstrap server information, these manual operations can be avoided by borrowing the concept of a "Provider" from the PasswordProvider.
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