Create folder mounting between localhost and minikube services

Question

I have some trouble creating a mounting folder between my local host (Ubuntu 20.04) to my services running on minikube. I want multiple containers to share files (one container will write, and the others will read).

The services have a simple Python script that gets a path to a folder:

with open('/MountedFolder/MyFile.txt', 'w') as f:
    f.write("New Text")

And I have a simple deployment file that looks like that:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: info-deployment
  labels:
    app: info
spec:
  replicas: 1
  selector:
    matchLabels:
      app: info
  template:
    metadata:
      labels:
        app: info
    spec:
      containers:
      - name: info
        image: info:1.0
        ports:
        - containerPort: 8081

I succeeded in getting a mounted folder as a URL (http://localhost). Using this guide:

https://kubernetes.io/docs/tasks/configure-pod-container/configure-persistent-volume-storage/

However, I am looking for a “path” like mounting (/MountedFolder/MyFile.txt) on the host.

Is it possible? If so, how?

Answer 1

If you used the PVC-Guide (https://kubernetes.io/docs/tasks/configure-pod-container/configure-persistent-volume-storage/)

Change your python to:

with open('[mountPath]/MyFile.txt', 'w') as f:
    f.write("New Text")

The file will then be created under: [mountPath]/MyFile.txt, where [mountPath] is set in your container spec. From pod viewpoint.

volumeMounts:
   - mountPath: "/usr/share/nginx/html"
     name: task-pv-storage

On the host you should find the file under:

"/mnt/data/MyFile.txt"