部署在Kubernetes上的Kafka Producer无法生产在本地计算机上运行的Kafka集群

时间:2018-08-30 13:05:37

标签: kubernetes apache-kafka kafka-producer-api minikube

我在本地计算机上运行的Kafka集群的minikube设置以外的默认设置。我已经在一个Web服务中创建了一个生产者,并将其部署在minikube上。

要使生产者连接到Kafka,我使用的是10.0.2.2 IP,我还使用它在minikube之外将Cassandra和DGraph连接起来,因为它们工作正常。

但是,Kafka生产者无法正常工作,甚至在发送数据时也没有抛出错误Broker may not be available或其他任何错误。但是在消费者方面我什么也没收到。

当我在Kubernetes之外运行此Web服务时,一切正常。

如果你们有什么想法,请问这里可能有什么问题。

下面是我正在使用的Kubernetes yaml文件。

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: servicename
  labels:
    app: servicename
    metrics: kamon
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: servicename
        metrics: kamon
    spec:
      containers:
      - image: "image:app"
        imagePullPolicy: IfNotPresent
        name: servicename
        env:
        - name: CIRCUIT_BREAKER_MAX_FAILURES
          value: "10"
        - name: CIRCUIT_BREAKER_RESET_TIMEOUT
          value: 30s
        - name: CIRCUIT_BREAKER_CALL_TIMEOUT
          value: 30s
        - name: CONTACT_POINT_ONE
          value: "10.0.2.2"
        - name: DGRAPH_HOSTS
          value: "10.0.2.2"
        - name: DGRAPH_PORT
          value: "9080"
        - name: KAFKA_BOOTSTRAP_SERVERS
          value: "10.0.2.2:9092"
        - name: KAFKA_PRODUCER_NOTIFICATION_CLIENT_ID
          value: "notificationProducer"
        - name: KAFKA_NOTIFICATION_TOPIC
          value: "notification"
        - name: LAGOM_PERSISTENCE_READ_SIDE_OFFSET_TIMEOUT
          value: 5s
        - name: LAGOM_PERSISTENCE_READ_SIDE_FAILURE_EXPONENTIAL_BACKOFF_MIN
          value: 3s
        - name: LAGOM_PERSISTENCE_READ_SIDE_FAILURE_EXPONENTIAL_BACKOFF_MAX
          value: 30s
        - name: LAGOM_PERSISTENCE_READ_SIDE_FAILURE_EXPONENTIAL_BACKOFF_RANDOM_FACTOR
          value: "0.2"
        - name: LAGOM_PERSISTENCE_READ_SIDE_GLOBAL_PREPARE_TIMEOUT
          value: 30s
        - name: LAGOM_PERSISTENCE_READ_SIDE_RUN_ON_ROLE
          value: ""
        - name: LAGOM_PERSISTENCE_READ_SIDE_USE_DISPATCHER
          value: lagom.persistence.dispatcher
        - name: AKKA_TIMEOUT
          value: 30s
        - name: NUMBER_OF_DGRAPH_REPOSITORY_ACTORS
          value: "2"
        - name: DGRAPH_ACTOR_TIMEOUT_MILLIS
          value: "20000"
        - name: AKKA_ACTOR_PROVIDER
          value: "cluster"
        - name: AKKA_CLUSTER_SHUTDOWN_AFTER_UNSUCCESSFUL_JOIN_SEED_NODES
          value: 40s
        - name: AKKA_DISCOVERY_METHOD
          value: "kubernetes-api"
        - name: AKKA_IO_DNS_RESOLVER
          value: "async-dns"
        - name: AKKA_IO_DNS_ASYNC_DNS_PROVIDER_OBJECT
          value: "com.lightbend.rp.asyncdns.AsyncDnsProvider"
        - name: AKKA_IO_DNS_ASYNC_DNS_RESOLVE_SRV
          value: "true"
        - name: AKKA_IO_DNS_ASYNC_DNS_RESOLV_CONF
          value: "on"
        - name: AKKA_MANAGEMENT_HTTP_PORT
          value: "10002"
        - name: AKKA_MANAGEMENT_HTTP_BIND_HOSTNAME
          value: "0.0.0.0"
        - name: AKKA_MANAGEMENT_HTTP_BIND_PORT
          value: "10002"
        - name: AKKA_MANAGEMENT_CLUSTER_BOOTSTRAP_CONTACT_POINT_DISCOVERY_REQUIRED_CONTACT_POINT_NR
          value: "1"
        - name: AKKA_REMOTE_NETTY_TCP_PORT
          value: "10001"
        - name: AKKA_REMOTE_NETTY_TCP_BIND_HOSTNAME
          value: "0.0.0.0"
        - name: AKKA_REMOTE_NETTY_TCP_BIND_HOSTNAME
          value: "0.0.0.0"
        - name: AKKA_REMOTE_NETTY_TCP_BIND_PORT
          value: "10001"
        - name: LAGOM_CLUSTER_EXIT_JVM_WHEN_SYSTEM_TERMINATED
          value: "on"
        - name: PLAY_SERVER_HTTP_ADDRESS
          value: "0.0.0.0"
        - name: PLAY_SERVER_HTTP_PORT
          value: "9000"
        ports:
        - containerPort: 9000
        - containerPort: 9095
        - containerPort: 10001
        - containerPort: 9092
          name: "akka-remote"
        - containerPort: 10002
          name: "akka-mgmt-http"
---
apiVersion: v1
kind: Service
metadata:
  name: servicename
  labels:
    app: servicename
spec:
  ports:
    - name: "http"
      port: 9000
      nodePort: 31001
      targetPort: 9000
    - name: "akka-remote"
      port: 10001
      protocol: TCP
      targetPort: 10001
    - name: "akka-mgmt-http"
      port: 10002
      protocol: TCP
      targetPort: 10002
  selector:
    app: servicename
  type: NodePort

1 个答案:

答案 0 :(得分:0)

  

我已经连接到与Kafka在同一台计算机上运行的Cassandra和Dgraph

那么,这些服务不会通过Zookeeper公布其网络地址。

  

我的Kafka集群在K8之外。但是,生产者在K8中。

为了使k8s之外的服务知道Kafka的位置,需要将advertised.listeners设置为一个外部IP或DNS地址,以便可以识别k8s环境中的所有生产者/消费者服务。您的服务将连接到。例如PLAINTEXT://10.0.2.2:9092

换句话说,如果您没有设置侦听器,而只是在localhost上侦听,那仅仅是因为Kafka端口是外部暴露的,这意味着尽管您可以联系到一个代理,但您获得的地址作为协议的一部分,不能保证与客户端的配置相同,而这正是广告监听器地址起作用的地方。