My aim is to start a kafka topic with multiple partitions on kubernetes. To do that I deploy the following .yml file:

apiVersion: v1
kind: Namespace
metadata:
  name: kafka

---

apiVersion: v1
kind: Pod
metadata:
  name: kubernetes-kafka
  namespace: kafka
  labels:
    k8s-app: kubernetes-kafka
spec:
  containers:
    - name: zookeeper
      image: zookeeper
      env:
      - name: ZOO_MY_ID
        value: "1"


    - name: kafka
      image: wurstmeister/kafka
      env:
      - name: KAFKA_ADVERTISED_HOST_NAME
        value: "kubernetes-cluster.nt"
      - name: KAFKA_ADVERTISED_PORT
        value: 30001
      - name: KAFKA_ZOOKEEPER_CONNECT
        value: "localhost:2181"
      - name: KAFKA_BROKER_ID
        value: "1"
      - name: KAFKA_CREATE_TOPICS
        value: write:20:1

---

apiVersion: v1
kind: Service
metadata:
  name: kubernetes-kafka
  namespace: kafka
spec:
  type: NodePort
  selector:
    k8s-app: kubernetes-kafka
  ports:
  - name: zk-client
    port: 2181
    protocol: TCP
  - name: zk-follower
    port: 2888
    protocol: TCP
  - name: zk-election
    port: 3888
    protocol: TCP
  - name: zk-admin
    port: 8080
    protocol: TCP
  - name: kafka-client
    port: 9092
    nodePort: 30001
    protocol: TCP

I expect this code to create a kafka server on kubernetes, whose write topic can be accessible via host:port = kubernetes-cluster.nt:30001

However, although kubernetes service and pod are started (kubectl get pods --all-namespaces and kubectl get services --all-namespaces commands list entries with the name kubernetes-kafka), the kafka topic is not created:

kafkacat -b kubernetes-cluster.nt:30001 -L

which should list all topics returns that 0 topics are created:

Metadata for all topics (from broker 1: kubernetes-cluster.nt:30001/1):
 1 brokers:
   broker 1 at kubernetes-cluster.nt:30001
 0 topics:

What am I doing wrong?