Add connection to Hetzner storage box for ReadWriteMany + cheaper storage then SSD

[aptroost]

Example using Samba, but requires manual creating of storage box.
After generating storage box, the $HETZNER_STORAGE_USER is the id of your storage box.
You have to create a password for that specific storage box and use it as $HETZNER_STORAGE_PASSWORD

source: https://github.com/kubernetes-csi/csi-driver-smb

helm repo add csi-driver-smb https://raw.githubusercontent.com/kubernetes-csi/csi-driver-smb/master/charts
helm install csi-driver-smb csi-driver-smb/csi-driver-smb --namespace kube-system --version v1.9.0

Create secret

kubectl create secret generic smbcreds --from-literal username="$HETZNER_STORAGE_USER" \
--from-literal password="$HETZNER_STORAGE_PASSWORD"

smb.yaml:

---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-samba
spec:
  capacity:
    storage: 100Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: smb
  mountOptions:
    - dir_mode=0777
    - file_mode=0777
  csi:
    driver: smb.csi.k8s.io
    readOnly: false
    volumeHandle: unique-samba  # make sure it's a unique id in the cluster
    volumeAttributes:
      source: "//$HETZNER_STORAGE_USER.your-storagebox.de/backup"
    nodeStageSecretRef:
      name: smbcreds

---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: pvc-samba
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Gi
  volumeName: pv-samba
  storageClassName: smb

Deploy smb.yaml:

kubectl create -f smb.yaml

usage in deployment:

volumes:
  - name: hetzner-storage
    persistentVolumeClaim:
      claimName: pvc-samba