Error kafka cannot connect zookeeper on Kubernetes(single node)

Question

I have problem with run kafka and zookeeper on kubernetes single node, I test with my laptop and it work but I run on private server it show error in kafka pod and I don't know network setting on private server

I use kompose to convert docker-compose file to k8s yaml file

zoo1: Temporary failure in name resolution

How to fix that error?

Thank you

my deployment and service yaml file

kafka1-deployment.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    kompose.cmd: kompose convert
    kompose.version: 1.16.0 (0c01309)
  creationTimestamp: null
  labels:
    io.kompose.service: kafka1
  name: kafka1
spec:
  replicas: 1
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        io.kompose.service: kafka1
    spec:
      containers:
      - env:
        - name: KAFKA_ADVERTISED_LISTENERS
          value: PLAINTEXT://kafka1:9092
        - name: KAFKA_BROKER_ID
          value: "1"
        - name: KAFKA_LOG4J_LOGGERS
          value: kafka.controller=INFO,kafka.producer.async.DefaultEventHandler=INFO,state.change.logger=INFO
        - name: KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR
          value: "1"
        - name: KAFKA_ZOOKEEPER_CONNECT
          value: zoo1:2181
        image: confluentinc/cp-kafka:4.0.0
        name: kafka1
        ports:
        - containerPort: 9092
        resources: {}
      hostname: kafka1
      restartPolicy: Always
status: {}

kafka1-service.yaml

apiVersion: v1
kind: Service
metadata:
  annotations:
    kompose.cmd: kompose convert
    kompose.version: 1.16.0 (0c01309)
  creationTimestamp: null
  labels:
    io.kompose.service: kafka1
  name: kafka1
spec:
  ports:
  - name: "9092"
    port: 9092
    targetPort: 9092
  selector:
    io.kompose.service: kafka1
status:
  loadBalancer: {}

zoo1-deployment.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    kompose.cmd: kompose convert
    kompose.version: 1.16.0 (0c01309)
  creationTimestamp: null
  labels:
    io.kompose.service: zoo1
  name: zoo1
spec:
  replicas: 1
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        io.kompose.service: zoo1
    spec:
      containers:
      - env:
        - name: ZOO_MY_ID
          value: "1"
        - name: ZOO_PORT
          value: "2181"
        - name: ZOO_SERVERS
          value: server.1=zoo1:2888:3888
        image: zookeeper:3.4.9
        name: zoo1
        ports:
        - containerPort: 2181
        resources: {}
      hostname: zoo1
      restartPolicy: Always
status: {}

zoo1-service.yaml

apiVersion: v1
kind: Service
metadata:
  annotations:
    kompose.cmd: kompose convert
    kompose.version: 1.16.0 (0c01309)
  creationTimestamp: null
  labels:
    io.kompose.service: zoo1
  name: zoo1
spec:
  ports:
  - name: "2181"
    port: 2181
    targetPort: 2181
  selector:
    io.kompose.service: zoo1
status:
  loadBalancer: {}

Answer 1

You have to create headless services for kafla and zookeeper

I would recommend to use confluent helm charts to use kafka in kubernetes, you can find how they created headless services.

What are the logs? What's happening exactly?

Hope that's help!