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vSphere CSI Driver

vSphere CSI driver allows you to provision volumes over a vSphere deployment. The Kubernetes historic in-tree cloud provider is deprecated and will be removed in future versions.

Prerequisites

The vSphere user for CSI driver requires a set of privileges to perform Cloud Native Storage operations. Follow the official guide to configure those.

Kubespray configuration

To enable vSphere CSI driver, uncomment the vsphere_csi_enabled option in group_vars/all/vsphere.yml and set it to true.

To set the number of replicas for the vSphere CSI controller, you can change vsphere_csi_controller_replicas option in group_vars/all/vsphere.yml.

You need to source the vSphere credentials you use to deploy your machines that will host Kubernetes.

Variable Required Type Choices Default Comment
external_vsphere_vcenter_ip TRUE string IP/URL of the vCenter
external_vsphere_vcenter_port TRUE string "443" Port of the vCenter API
external_vsphere_insecure TRUE string "true", "false" "true" set to "true" if the host above uses a self-signed cert
external_vsphere_user TRUE string User name for vCenter with required privileges (Can also be specified with the VSPHERE_USER environment variable)
external_vsphere_password TRUE string Password for vCenter (Can also be specified with the VSPHERE_PASSWORD environment variable)
external_vsphere_datacenter TRUE string Datacenter name to use
external_vsphere_kubernetes_cluster_id TRUE string "kubernetes-cluster-id" Kubernetes cluster ID to use
external_vsphere_version TRUE string "6.7u3" Vmware Vsphere version where located all VMs
external_vsphere_cloud_controller_image_tag TRUE string "latest" Kubernetes cluster ID to use
vsphere_syncer_image_tag TRUE string "v2.2.1" Syncer image tag to use
vsphere_csi_attacher_image_tag TRUE string "v3.1.0" CSI attacher image tag to use
vsphere_csi_controller TRUE string "v2.2.1" CSI controller image tag to use
vsphere_csi_controller_replicas TRUE integer 1 Number of pods Kubernetes should deploy for the CSI controller
vsphere_csi_liveness_probe_image_tag TRUE string "v2.2.0" CSI liveness probe image tag to use
vsphere_csi_provisioner_image_tag TRUE string "v2.1.0" CSI provisioner image tag to use
vsphere_csi_node_driver_registrar_image_tag TRUE string "v1.1.0" CSI node driver registrar image tag to use
vsphere_csi_driver_image_tag TRUE string "v1.0.2" CSI driver image tag to use
vsphere_csi_resizer_tag TRUE string "v1.1.0" CSI resizer image tag to use
vsphere_csi_aggressive_node_drain FALSE boolean false Enable aggressive node drain strategy
vsphere_csi_aggressive_node_unreachable_timeout FALSE int 300 Timeout till node will be drained when it in an unreachable state
vsphere_csi_aggressive_node_not_ready_timeout FALSE int 300 Timeout till node will be drained when it in not-ready state
vsphere_csi_namespace TRUE string "kube-system" vSphere CSI namespace to use; kube-system for backward compatibility, should be change to vmware-system-csi on the long run

Usage example

To test the dynamic provisioning using vSphere CSI driver, make sure to create a storage policy and storage class, then apply the following manifest:

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: csi-pvc-vsphere
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: Space-Efficient

---
apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - image: nginx
    imagePullPolicy: IfNotPresent
    name: nginx
    ports:
    - containerPort: 80
      protocol: TCP
    volumeMounts:
      - mountPath: /usr/share/nginx/html
        name: csi-data-vsphere
  volumes:
  - name: csi-data-vsphere
    persistentVolumeClaim:
      claimName: csi-pvc-vsphere
      readOnly: false

Apply this conf to your cluster: kubectl apply -f nginx.yml

You should see the PVC provisioned and bound:

$ kubectl get pvc
NAME              STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
csi-pvc-vsphere   Bound    pvc-dc7b1d21-ee41-45e1-98d9-e877cc1533ac   1Gi        RWO            Space-Efficient   10s

And the volume mounted to the Nginx Pod (wait until the Pod is Running):

kubectl exec -it nginx -- df -h | grep /usr/share/nginx/html
/dev/sdb         976M  2.6M  907M   1% /usr/share/nginx/html

More info

For further information about the vSphere CSI Driver, you can refer to the official vSphere Cloud Provider documentation.