Failing to connect to single Kafka broker in local Docker container

I’m using the Wurstmeister Docker Image to try to run a very basic single broker Kafka server just for testing my application.

It’s a simple docker-compose.yml:

version: '2'
services:
  zookeeper:
    image: wurstmeister/zookeeper
    ports:
      - '2181:2181'
  kafka:
    image: wurstmeister/kafka
    ports:
      - '9092:9092'
    environment:
      KAFKA_ADVERTISED_HOST_NAME: localhost
      KAFKA_ADVERTISED_PORT: 9092
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'true'
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock

I can enter the container, and create topics using the standard binaries, e.g.

> docker exec -it ${container} kafka-topics.sh --create --topic my-topic --bootstrap-server localhost:9092
> docker exec -it ${container} kafka-topics.sh --list --bootstrap-server localhost:9092
my-topic

Displaying container information shows the port 9092 exposed:

> docker ps
CONTAINER ID   IMAGE                      COMMAND                  CREATED          STATUS         PORTS                                                NAMES
14b0210787cf   wurstmeister/zookeeper     "/bin/sh -c '/usr/sb…"   11 seconds ago   Up 9 seconds   22/tcp, 2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp   catalog-ingestor-service_zookeeper_1
9ecb59c1bfdd   wurstmeister/kafka         "start-kafka.sh"         11 seconds ago   Up 9 seconds   0.0.0.0:9092->9092/tcp                               catalog-ingestor-service_kafka_1

Using kcat (kafkacat), which I installed using homebrew, I try to connect and get an error:

> kcat -b localhost:9092 -L
%3|1645810235.301|FAIL|rdkafka#producer-1| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Failed to resolve 'localhost:9092': nodename nor servname provided, or not known (after 5002ms in state CONNECT)
% ERROR: Failed to acquire metadata: Local: Broker transport failure (Are the brokers reachable? Also try increasing the metadata timeout with -m <timeout>?)

I’m pretty sure I should be trying to connect on localhost:9092, but even when I ping it, it doesn’t seem to resolve:

> ping localhost:9092
ping: cannot resolve localhost:9092: Unknown host

Also, I assume I don’t need to explicitly create a network / bridge across the Kafka Broker and Zookeeper, since zookeeper:2181 already resolves that bridge?