flink部署【使用k8s部署】

準備k8s環境

準備相關YAML

• flink-configuration-configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: flink-config
  labels:
    app: flink
data:
  flink-conf.yaml: |+
    jobmanager.rpc.address: flink-jobmanager
    taskmanager.numberOfTaskSlots: 2
    blob.server.port: 6124
    jobmanager.rpc.port: 6123
    taskmanager.rpc.port: 6122
    jobmanager.heap.size: 1024m
    taskmanager.memory.process.size: 1024m
  log4j.properties: |+
    log4j.rootLogger=INFO, file
    log4j.logger.akka=INFO
    log4j.logger.org.apache.kafka=INFO
    log4j.logger.org.apache.hadoop=INFO
    log4j.logger.org.apache.zookeeper=INFO
    log4j.appender.console=org.apache.log4j.ConsoleAppender
    log4j.appender.console.layout=org.apache.log4j.PatternLayout
    log4j.appender.console.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
    log4j.appender.file=org.apache.log4j.FileAppender
    log4j.appender.file.file=${log.file}
    log4j.appender.file.layout=org.apache.log4j.PatternLayout
    log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
    log4j.logger.org.apache.flink.shaded.akka.org.jboss.netty.channel.DefaultChannelPipeline=ERROR, file

• jobmanager-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: flink-jobmanager
spec:
  replicas: 1
  selector:
    matchLabels:
      app: flink
      component: jobmanager
  template:
    metadata:
      labels:
        app: flink
        component: jobmanager
    spec:
      containers:
      - name: jobmanager
        image: hub.deri.org.cn/library/flink:latest
        workingDir: /opt/flink
        command: ["/bin/bash", "-c", "$FLINK_HOME/bin/jobmanager.sh start;\
          while :;
          do
            if [[ -f $(find log -name '*jobmanager*.log' -print -quit) ]];
              then tail -f -n +1 log/*jobmanager*.log;
            fi;
          done"]
        ports:
        - containerPort: 6123
          name: rpc
        - containerPort: 6124
          name: blob
        - containerPort: 8081
          name: ui
        livenessProbe:
          tcpSocket:
            port: 6123
          initialDelaySeconds: 30
          periodSeconds: 60
        volumeMounts:
        - name: flink-config-volume
          mountPath: /opt/flink/conf
        securityContext:
          runAsUser: 9999  # refers to user _flink_ from official flink image, change if necessary
      volumes:
      - name: flink-config-volume
        configMap:
          name: flink-config
          items:
          - key: flink-conf.yaml
            path: flink-conf.yaml
          - key: log4j.properties
            path: log4j.properties

• jobmanager-rest-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: flink-jobmanager-rest
spec:
  type: NodePort
  ports:
  - name: rest
    port: 8081
    targetPort: 8081
  selector:
    app: flink
    component: jobmanager

• jobmanager-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: flink-jobmanager
spec:
  type: ClusterIP
  ports:
  - name: rpc
    port: 6123
  - name: blob
    port: 6124
  - name: ui
    port: 8081
  selector:
    app: flink
    component: jobmanager

• taskmanager-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: flink-taskmanager
spec:
  replicas: 2
  selector:
    matchLabels:
      app: flink
      component: taskmanager
  template:
    metadata:
      labels:
        app: flink
        component: taskmanager
    spec:
      containers:
      - name: taskmanager
        image: hub.deri.org.cn/library/flink:latest
        workingDir: /opt/flink
        command: ["/bin/bash", "-c", "$FLINK_HOME/bin/taskmanager.sh start; \
          while :;
          do
            if [[ -f $(find log -name '*taskmanager*.log' -print -quit) ]];
              then tail -f -n +1 log/*taskmanager*.log;
            fi;
          done"]
        ports:
        - containerPort: 6122
          name: rpc
        livenessProbe:
          tcpSocket:
            port: 6122
          initialDelaySeconds: 30
          periodSeconds: 60
        volumeMounts:
        - name: flink-config-volume
          mountPath: /opt/flink/conf/
        securityContext:
          runAsUser: 9999  # refers to user _flink_ from official flink image, change if necessary
      volumes:
      - name: flink-config-volume
        configMap:
          name: flink-config
          items:
          - key: flink-conf.yaml
            path: flink-conf.yaml
          - key: log4j.properties
            path: log4j.properties

在k8s中部署

• 安裝

kubectl apply -f .

• 卸載

kubectl delete -f .

查看flink UI

[root@master k8s-flink]# kubectl get svc
NAME                    TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)                      AGE
flink-jobmanager        ClusterIP   10.100.206.17   <none>        6123/TCP,6124/TCP,8081/TCP   3h47m
flink-jobmanager-rest   NodePort    10.109.136.52   <none>        8081:30696/TCP               3h47m
kubernetes              ClusterIP   10.96.0.1       <none>        443/TCP                      4d21h

其中flink-jobmanager-rest對應的30696端口就是UI的訪問端口,也可以使用Ingress來訪問，這裏測試使用NodePort方式.