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dockerkubernetesdocker-volumepersistent-volumes

How to access PersistentVolume files on docker-for-desktop?

I'd like to access and edit files in my Kubernetes PersistentVolume on my local computer (macOS), but I cannot understand where to find those files!

I'm pointing my hostPath to /tmp/wordpress-volume but I cannot find it anywhere. What is the hidden secret I'm missing

I'm using the following configuration on a docker-for-desktop cluster Version 2.0.0.2 (30215).

PersistentVolume

kind: PersistentVolume
metadata:
  name: wordpress-volume
spec:
  # ...
  hostPath:
    path: /tmp/wordpress-volume

PersistentVolumeClaim

kind: PersistentVolumeClaim
metadata:
  name: wordpress-volume-claim
# ...

Deployment

kind: Deployment
metadata:
  name: wordpress
# ...
spec:
  containers:
  - image: wordpress:4.8-apache
    # ...
    volumeMounts:
    - name: wordpress-volume
      mountPath: /var/www/html
  volumes:
  - name: wordpress-volume
    persistentVolumeClaim:
      claimName: wordpress-volume-claim
Solution

  • Thanks to @aman-tuladhar and some hours lost on the internet I've found out that you just need to make sure storageClassName is set for you PersistentVolume and PersistentVolumeClaim.

    As per documentation if you want to avoid that Kubernetes dynamically generetes PersistentVolumes without considering the one you statically declared, you can just set a empty string " ".

    In my case I've set storageClassName: manual.

    PersistentVolume

    kind: PersistentVolume
metadata:
  name: wordpress-volume
spec:
  # ...
  storageClassName: manual
  hostPath:
    path: /tmp/wordpress-volume

    PersistentVolumeClaim

    kind: PersistentVolumeClaim
metadata:
  name: wordpress-volume-claim
spec:
  storageClassName: manual
  # ...

    This works out of the box with docker-for-desktop cluster (as long as mountPath is set to a absolute path).

    References: