Question

我是kubernetes的新手，我正在尝试将kafka与debezium和mysql集成在一起。我在minikube上成功部署了kafka和mysql，一旦在minikube上部署了debezium yml，它就被挂起了，根本没有响应，然后我重新启动了minikube，在运行了所有pod minikube之后，又再次被挂起了。下面是我的代码：

动物园管理员服务

ProcessBuilder

zookeeper部署：

 String execLoc = ((System.getenv("APPDATA"))+"\\ARcraft\\exec\\Minecraft.exe");
 ProcessBuilder getCrafting = new ProcessBuilder(execLoc);
 getCrafting.start();

kafka服务：

 apiVersion: v1
kind: Service
metadata:
  name: zoo1
  labels:
    app: zookeeper-1
spec:
  ports:
  - name: client
    port: 2181
    protocol: TCP
  - name: follower
    port: 2888
    protocol: TCP
  - name: leader
    port: 3888
    protocol: TCP
  selector:
    app: zookeeper-1

kafka deployemnt：

kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: zookeeper-deployment-1
spec:
  template:
    metadata:
      labels:
        app: zookeeper-1
    spec:
      containers:
      - name: zoo1
        image: debezium/zookeeper
        ports:
        - containerPort: 2181
        env:
        - name: ZOOKEEPER_ID
          value: "1"
        - name: ZOOKEEPER_SERVER_1
          value: zoo1

MySql持久性卷：

apiVersion: v1
kind: Service
metadata:
  name: kafka-service
  labels:
    name: kafka
spec:
  ports:
  - port: 9092
    name: kafka-port
    protocol: TCP
  selector:
    app: kafka
    id: "1"
  type: NodePort

mysql部署：

kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: kafka-broker1
spec:
  template:
    metadata:
      labels:
        selector: kafka
        app: kafka
        id: "1"
    spec:
      containers:
      - name: kafka
        image: debezium/kafka
        ports:
        - containerPort: 9092
        env:
        - name: KAFKA_ADVERTISED_PORT
          value: "9092"
        - name: KAFKA_ADVERTISED_HOST_NAME
          value: 192.168.39.47
        - name: KAFKA_ZOOKEEPER_CONNECT
          value: zoo1:2181
        - name: KAFKA_BROKER_ID
          value: "1"
        - name: KAFKA_CREATE_TOPICS
          value: hello-topic:3:3

Debezium部署：

#application/mysql/mysql-pv.yaml  
kind: PersistentVolume
apiVersion: v1
metadata:
  name: mysql-pv-volume
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

当我部署debezium时，问题开始出现，并且minikube响应如

#application/mysql/mysql-deployment.yaml 
# this command is for mysql client   kubectl run -it --rm --image=debezium/example-mysql --restart=Never mysql-client -- mysql -h mysql -pdebezium 
apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  ports:
  - port: 3306
  selector:
    app: mysql
  clusterIP: None
---
apiVersion: extensions/v1beta1  # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - image: debezium/example-mysql
        name: mysql
        env:
          # Use secret in real usage
        - name: MYSQL_ROOT_PASSWORD
          value: debezium
        - name: MYSQL_USER
          value: mysqluser
        - name: MYSQL_PASSWORD
          value: mysqlpw
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim

OS：Centos
minikube版本：v0.30.0

Answer 1

我相信这是由于minikube启动的VM上的资源紧张而引起的。

默认情况下，当您开始使用minikube start时，它仅占用系统2个CPU和2GB RAM，并且通过查看部署（kafka + mysql + debezium）可能还不够。

通过将minikube start与参数--cpu和--memory一起使用，可以增加分配给VM的CPU和内存（值应以MB为单位）。

有关更多信息，请执行minikube start -h

我强烈建议，如果您要进行繁重的部署，则应该使用具有更多资源的计算机。

希望这会有所帮助。

Answer 2

您应该为基于Java的Pod设置内存限制。 Java的较早版本会将整个来宾内存视为自己的内存，并且会很乐意完全使用它-并且至少启动了三个JVM。

无法在minikube上部署Debezium

2 个答案: