I'm trying to have a kubernetes deployment to work, on a mac with minikube, and using a jar file located in a local host directory:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: master
spec:
  replicas: 1
  (...)
      containers:
        - name: master-c
          (...)
          volumeMounts:
            (...)
            - name: master-volume
              mountPath: /server/plugins/master.jar
              #subPath: master.jar
      volumes:
        - name: master-volume
          hostPath: 
            path: /localdir/master.jar
            type: File

using File type I get this error:

     Warning  FailedMount  10s (x6 over 26s)  kubelet           
MountVolume.SetUp failed for volume "master-volume" : hostPath type check failed: /localdir/master.jar is not a file

using Directory type is simply creating an empty dir in pod path.

How to get the jar file available ? I know that kubectl cp can copy the jar file into the pod directory, but application is started and does not recognize it, so I need to have the jar file available before to start the application. Any idea ?