I have a local running cluster deployed with minikube. Spring Cloud Data Flow is deployed according to this tutorial. At this time, I'm able to create a kubernetes task on the SCDF dashboard and launch it. Although I have a task which reads file from file system and I would like to read that file from a shared NFS directory mounted in the POD.

I have a NFS server configured and running in another virtual machine and there is a persistent volume created in my kubernetes cluster pointing to the NFS host. When launching a task, some parameters are provided.

  deployer.job-import-access-file.kubernetes.volumes=[
  {
    name: accessFilesDir,
    persistentVolumeClaim: {
      claimName: 'apache-volume-claim'
    }
  },
  {
    name: processedFilesDir,
    persistentVolumeClaim: {
      claimName: 'apache-volume-claim'
    }
  }
]deployer.job-import-access-file.kubernetes.volumeMounts=[
  {
    name: 'accessFilesDir',
    mountPath: '/data/apache/access'
  },
  {
    name: 'processedFilesDir',
    mountPath: '/data/apache/processed'
  }
]

nfs-volume.yaml

---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-apache-volume
spec:
  capacity:
    storage: 1Gi
  accessModes:
  - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: standard
  nfs:
    server: 10.255.254.10
    path: '/var/nfs/apache'

nfs-volume-claim.yaml

---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: apache-volume-claim
  namespace: default
spec:
  storageClassName: standard
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 1Gi

Application Docker file

FROM openjdk:8-jdk-alpine

COPY target/job-import-access-file-0.1.0.jar /opt/job-import-access-file-0.1.0.jar
VOLUME ["/data/apache/access", "/data/apache/processed"]

ENTRYPOINT ["java","-jar","/opt/job-import-access-file-0.1.0.jar"]

It is expected that my task reads files from the mounted directory. But directory is empty. I mean, it is mounted although there is no sync.