Re: Can a controller in a kafka kraft cluster be a bootstrap server

Hi Dima,

You can set "process.roles=controller,broker" to get what you want.
Otherwise, the controller role cannot be served as a broker.

Thanks.
Luke

On Sat, Dec 9, 2023 at 3:59 AM Dima Brodsky <ddbrodsky@gmail.com> wrote:

> Hello,
>
> Would the following configuration be valid in a kafka kraft cluster
>
> So lets say we had the following configs for a controller and a broker:
>
> === controller -
>
> https://github.com/apache/kafka/blob/6d1d68617ecd023b787f54aafc24a4232663428d/config/kraft/controller.properties
>
> process.roles=controller
> node.id=1
> controller.quorum.voters=1@host1:9093
> listeners=CONTROLLER://:9093,BROKER://:9092
> controller.listener.names=CONTROLLER
>
> advertised.listeners=BROKER://:9092,CONTROLLER://:9093
> inter.broker.listener.name=BROKER
>
> === broker -
>
> https://github.com/apache/kafka/blob/6d1d68617ecd023b787f54aafc24a4232663428d/config/kraft/broker.properties
>
> process.roles=broker
> node.id=2
> controller.quorum.voters=1@host1:9093
> listeners=BROKER://:9092
> inter.broker.listener.name=BROKER
> advertised.listeners=BROKER://:9092
>
> The controller, not only advertises itself as a controller but also as a
> broker. If the controller is contacted by a client as a bootstrap server
> will the controller be able to perform the duties of a bootstrap server or
> that role has to be left to the brokers. What I have in green has been
> added to the controller config.
>
> Thanks!
> ttyl
> Dima
>