Kafka on AWS ECS, how to handle advertised.host without known instance?


I’m trying to get Kafka running on an AWS ECS container. I have this setup already / working fine on my local docker environment, using the spotify/kafka image

To get this working locally, I needed to ensure the ADVERTISED_HOST environment variable was set. ADVERTISED_HOST needed to be set as the containers external IP, otherwise when I try to connect it was just giving me connection refused.

My local docker-compose.yaml has this for the kafka container:

Now the problem is, I don’t know what the IP is going to be, as I dont know which instance this will run on. So how do I set that environment variable?


Your entrypoint script will need to call the EC2 Metadata Service on startup (in this case to get the external-to-docker hostname and set that variable.


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