Clarifies that the env isn't required

Author: solsson

kafka/10broker-config.yml

@@ -26,9 +26,10 @@ data:
         LABELS="$LABELS kafka-broker-rack=$ZONE"
       fi
 
+      [ -z "$INSIDE_HOST" ] && echo "INSIDE_HOST is empty, will advetise detected DNS name"
       OUTSIDE_HOST=$(kubectl get node "$NODE_NAME" -o jsonpath='{.status.addresses[?(@.type=="InternalIP")].address}')
       OUTSIDE_PORT=$((32400 + ${KAFKA_BROKER_ID}))
-      SEDS+=("s|#init#advertised.listeners=PLAINTEXT://#init#|advertised.listeners=PLAINTEXT://${ADVERTISE_ADDRESS}:9092,OUTSIDE://${OUTSIDE_HOST}:${OUTSIDE_PORT}|")
+      SEDS+=("s|#init#advertised.listeners=PLAINTEXT://#init#|advertised.listeners=PLAINTEXT://${INSIDE_HOST}:9092,OUTSIDE://${OUTSIDE_HOST}:${OUTSIDE_PORT}|")
       ANNOTATIONS="$ANNOTATIONS kafka-listener-outside-host=$OUTSIDE_HOST kafka-listener-outside-port=$OUTSIDE_PORT"
 
       if [ ! -z "$LABELS" ]; then