The csi-nfs module

This module provides CSI that manages volumes based on NFS. The module allows you to create a StorageClass in Kubernetes by creating Kubernetes custom resources NFSStorageClass.

Caution! The user is not allowed to create a StorageClass for the nfs.csi.k8s.io CSI driver.

System requirements and recommendations

Requirements

• Stock kernels shipped with the supported distributions.
• Presence of a deployed and configured NFS server.

Quickstart guide

Note that all commands must be run on a machine that has administrator access to the Kubernetes API.

Enabling module

• Enable the csi-nfs module. This will result in the following actions across all cluster nodes:
  • registration of the CSI driver;
  • launch of service pods for the csi-nfs components.

kubectl apply -f - <<EOF
apiVersion: deckhouse.io/v1alpha1
kind: ModuleConfig
metadata:
  name: csi-nfs
spec:
  enabled: true
  version: 1
EOF

• Wait for the module to become Ready.

kubectl get module csi-nfs -w

Creating a StorageClass

To create a StorageClass, you need to use the NFSStorageClass resource. Here is an example command to create such a resource:

kubectl apply -f - <<EOF
apiVersion: storage.deckhouse.io/v1alpha1
kind: NFSStorageClass
metadata:
  name: nfs-storage-class
spec:
  connection:
    host: 10.223.187.3
    share: /
    nfsVersion: "4.1"
  reclaimPolicy: Delete
  volumeBindingMode: WaitForFirstConsumer
EOF

A directory <directory from share>/<PV name> will be created for each PV.

Checking module health

You can verify the functionality of the module using the instructions here