22  Kubernetes Storage

By design, Kubernetes pod always starts with a clean storage (files do NOT persist after pod reboot). If files need to persist, a persistent volume must be configured.

Note

We will use Network File System (NFS) storage but other options are described at https://kubernetes.io/docs/concepts/storage/persistent-volumes/.

22.1 Configure NFS server at 194.95.75.12

See instructions at Chapter 17.

22.2 Install NFS provisioner in Kubernetes

Note

We will use https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner. Other provisioners are available.

In the machine running the controller panel (194.95.75.10), run

helm repo add nfs-subdir-external-provisioner https://kubernetes-sigs.github.io/nfs-subdir-external-provisioner/

"nfs-subdir-external-provisioner" has been added to your repositories

helm install nfs-subdir-external-provisioner nfs-subdir-external-provisioner/nfs-subdir-external-provisioner \
    --set nfs.server=194.95.75.12 \
    --set nfs.path=/sdd

NAME: nfs-subdir-external-provisioner
LAST DEPLOYED: Tue Apr  4 11:28:25 2023
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None

22.3 Create Persistent Volume

In the machine running the controller panel (194.95.75.10), run

kubectl apply -f nfs-storage/config-test.yaml

persistentvolumeclaim/nfs-test created

Check the volume is working:

kubectl get pvc