Hosts file changes about kafka-stack-docker-compose

[simplesteph]

Hi @cojack
Kafka has a concept of advertised host, and when you talk to kafka, it will ask you to communicate using the advertised host (all of that is done by the client). So as I set the advertised host to kafka1 for the first broker, when your programs connect to kafka1, they actually need to know that is also means localhost, hence the /etc/hosts file changes.
Makes sense?

It's also very much due to how docker handles networking, as every machine inherits a hostname and knows about each other within their network, but not the host machine

[cojack]

@simplesteph nope I does not explain me anything xD But don't worry, I don't have to know everything, just figured out that npm package no-kafka allows me to redirect brokers so I just map kafka{N} to correct host without touching the /etc/hosts files. Thanks a lot for your work with this easy docker kafka setup!