Kafka bootstrap servers

server.sh

#!/bin/bash
if [ -z "$1" ]; then 
        CONTAINER_PORT="9092"
else
        CONTAINER_PORT=$1
fi

# Get the Kafka container IP
if [[ "$OSTYPE" == "linux-gnu" ]]; then
        CONTAINER_IP=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' kafka)

elif [[ "$OSTYPE" == "darwin"* ]]; then
        CONTAINER_IP=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' kafka)
        sudo ifconfig lo0 alias $CONTAINER_IP
fi

# Create the config file
echo $CONTAINER_IP:$CONTAINER_PORT > server.properties