File Storage Service - Getting started (Beta)

Objective

OVHcloud provides a File Storage Service powered by OpenStack Manila. This service offers managed NFS shares on private networks, supporting ReadWriteMany (RWX) access across multiple instances or Kubernetes pods.

It can be accessed via OVHcloud API, OpenStack CLI and API, Manila CSI, and Terraform.

This service is currently in Beta, available only in the SBG5, DE1 and GRA regions. Features and availability may change.

During the Beta phase, the allowed share size ranges from 150 GiB to 10 TiB.

Requirements

You already have a private network available in your project.
A Public Cloud instance in your OVHcloud account
An OpenStack CLI ready environment

Instructions

Currently, the File Storage Service can only be accessed and managed via OVHcloud API, OpenStack CLI with the Manila plugin and Terraform. Other interfaces will be supported in the future.

Via the OVHcloud API
Via the OpenStack CLI with the Manila plugin
Via Manila CSI in Kubernetes environment
Via Terraform

1. Create a share

Identify your private network and subnet

Before creating or attaching a File Storage service, you must identify the target private network.

Retrieve the network ID:

GET /cloud/project/{serviceName}/region/{regionName}/network

Example output:

[
  {
    "id": "581fad02-158d-4dc6-81f0-c1ec2794bbec",
    "name": "Ext-Net",
    "visibility": "public",
    "vlanId": null
  },
  {
    "id": "[NETWORK_ID]",
    "name": "<my-network-name>",
    "visibility": "private",
    "vlanId": 2701
  }
]

NOTE: Only select a private network.

Retrieve the subnet ID using the network ID:

GET /cloud/project/{serviceName}/region/{regionName}/network/{networkId}/subnet

Example output:

[
  {
    "id": "[SUBNET_ID]",
    "name": "subnet-name",
    "cidr": "10.1.0.0/24",
    "ipVersion": 4,
    "dhcpEnabled": true,
    "gatewayIp": "10.1.0.1",
    "allocationPools": [
      {
        "start": "10.1.0.2",
        "end": "10.1.0.254"
      }
    ],
    "hostRoutes": [],
    "dnsNameServers": [
      "1.1.1.1"
    ]
  }
]

Both the network ID and subnet ID should have the format: abc12345-def6-4abc-8def-123456abcdef.

Create a 150 GiB NFS share attached to your private network:

POST /cloud/project/{serviceName}/region/{regionName}/share

NOTE: Replace with your chosen share name.

List your shares and wait until the newly created one appears with status available:

GET /cloud/project/{serviceName}/region/{regionName}/share

Example output:

{
  "capabilities": [
    {
      ...
    }
  ],
  "createdAt": "2026-01-14T08:23:30.079Z",
  "description": "<my-share-description>",
  "exportLocations": [
    {
      "id": "string",
      "path": "string"
    }
  ],
  "id": "[SHARE_ID]",
  "isPublic": false,
  "name": "<my-share-name>",
  "protocol": "NFS",
  "region": "[REGION]",
  "size": 150,
  "status": "available",
  "type": "standard-1az",
  "updatedAt": "2026-01-14T08:23:30.079Z"
}

NOTE: The share ID should have the format abc12345-def6-4abc-8def-123456abcdef.

Retrieve the share details using the share ID:

GET /cloud/project/{serviceName}/region/{regionName}/share/{id}

Example output:

{
  "capabilities": [
    {
      "enabled": true,
      "name": "<my-share-name>"
    }
  ],
  "createdAt": "2026-01-14T08:23:30.079Z",
  "description": "<my-share-description>",
  "exportLocations": [
    {
      "id": "string",
      "path": "10.1.0.12:/shares/share-abc12345-def6-4abc-8def-123456abcdef"
    }
  ],
  "id": "abc12345-def6-4abc-8def-123456abcdef",
  "isPublic": false,
  "name": "string",
  "protocol": "NFS",
  "region": "string",
  "size": 150,
  "status": "available",
  "type": "standard-1az",
  "updatedAt": "2026-01-14T08:23:30.079Z"
}

2. Authorize a client VM

Ensure the client VM is on the same private network as the share.

Retrieve the VM’s private IP address.

Grant access to the share using the VM’s private IP (e.g., 10.1.0.123) via ACL management:

POST /cloud/project/{serviceName}/region/{regionName}/share/{id}/acl

Example output:

{
  "accessLevel": "rw",
  "accessTo": "10.1.0.123",
  "createdAt": "2026-01-14T10:26:14.446Z",
  "id": "[ACL_ID]",
  "status": "active",
  "updatedAt": "2026-01-14T10:26:14.446Z"
}

Verify access to the NFS share from the authorized client VM:

GET /cloud/project/{serviceName}/region/{regionName}/share/{id}/acl/{aclId}

3. Mount the share on your client VM

Connect to your client VM and install the NFS utilities required to mount the share:

sudo apt update && sudo apt install -y nfs-common

Create a mount point and mount the share:

sudo mkdir -p /mnt/share && sudo mount -t nfs4 10.1.0.12:/shares/share-abc12345-def6-4abc-8def-123456abcdef /mnt/share

Verify the mount:

df -h /mnt/share

Make the mount persistent across reboots:

echo "<NFS_EXPORT_PATH> /mnt/share nfs nfsvers=4 defaults,noauto 0 0" | sudo tee -a /etc/fstab

This ensures the NFS share is automatically remounted after the VM restarts.

4. Check capacity and usage

Once the NFS share is mounted, verify its available space and usage:

df -h /mnt/share

Example output:

Filesystem                          Size  Used  Avail Use% Mounted on
10.1.0.12:/shares/share-abc1...     150G  100M   150G   1% /mnt/share

Note: This allows you to monitor the storage capacity and usage of your NFS share.

Additional requirements

Make sure your OpenStack user has the Administrator or Share operator role.

1. Install the Manila CLI plugin

If the Manila commands are not yet available, install the plugin:

sudo apt update && sudo apt install -y python3-manilaclient

Verify the installation:

openstack share --help

You should see commands such as:

share create
share list
share network create
share access create

2. Check available share types

List the share types available in your region:

openstack share type list --os-region-name <REGION_NAME>

Expected output:

+----------+-----------+------------+------------+
| ID       | Name      | Visibility | Is Default |
+----------+-----------+------------+------------+
| acceb7b4 | standard-1az | public     | True       |
+----------+-----------+------------+------------+

Note: The type standard-1az uses driver_handles_share_servers = True, which means you must attach a share network when creating a share.

3. Create a share network

Identify your private network and subnet:

openstack network list --os-region-name <REGION_NAME>
openstack subnet list --os-region-name <REGION_NAME>

Retrieve their IDs:

openstack network show --os-region-name <REGION_NAME> -c id -f value <PRIVATE_NETWORK_NAME>
openstack subnet show --os-region-name <REGION_NAME> -c id -f value <PRIVATE_SUBNET_NAME>

Both network and subnet IDs should look like: abc12345-def6-4abc-8def-123456abcdef

Create a share network linked to your private network:

openstack share network create \
  --os-region-name <REGION_NAME> \
  --name <my-share-network-name> \
  --neutron-net-id <NETWORK_ID> \
  --neutron-subnet-id <SUBNET_ID>

Note: Replace <my-share-network-name> with your chosen name for the share network.

Verify the share network:

openstack share network list --os-region-name <REGION_NAME>

4. Create an NFS share

Create a 150 GB NFS share:

openstack share create \
  --os-region-name <REGION_NAME> \
  --share-type standard-1az \
  --share-network <my-share-network-name> \
  --name <my-first-share-name> \
  NFS 150

Note: Replace with the name you want to assign to your share.

Monitor the share status until it becomes available:

openstack share list --os-region-name <REGION_NAME>

5. Authorize a client VM

Ensure your client VM is in the same private network as the share.

Retrieve the VM’s private IP address:

openstack server show --os-region-name <REGION_NAME> <VM_NAME> -c addresses -f value

Example output:

{'my-private-net': ['10.1.0.123', '57.123.88.111']}

Grant access to the share using the VM’s private IP (e.g., 10.1.0.123):

openstack share access create \
  --os-region-name <REGION_NAME> \
  <my-first-share-name> \
  ip 10.1.0.123

Verify access:

openstack share access list --os-region-name <REGION_NAME> <my-first-share-name>

6. Retrieve the export path

Get the NFS export location:

openstack share export location list --os-region-name <REGION_NAME> <my-first-share-name>

Example output:

10.1.0.12:/shares/share-abc12345-def6-4abc-8def-123456abcdef

Note: This export path is used to mount the share on your client VM.

7. Mount the share on your client VM

Connect to your VM and install NFS utilities:

sudo apt update && sudo apt install -y nfs-common

Create a mount point and mount the share:

sudo mkdir -p /mnt/share
sudo mount -t nfs4 10.1.0.12:/shares/share-abc12345-def6-4abc-8def-123456abcdef /mnt/share

Verify the mount:

df -h /mnt/share

Note: Replace the export path with the one retrieved for your share.

8. Check capacity and usage

Display available space on the mounted share:

df -h /mnt/share

Example output:

Example:
Filesystem                          Size  Used  Avail Use% Mounted on
10.1.0.12:/shares/share-abc1...     150G  100M   150G   1% /mnt/share

Note: This lets you monitor the storage capacity and usage of your NFS share.

9. Manage the share lifecycle

Resize the share:

Only extending a share is allowed for now; shrinking is not supported.

openstack share resize --os-region-name <REGION_NAME> <my-first-share-name> 200

Delete a share:

openstack share delete --os-region-name <REGION_NAME> <my-first-share-name>

Delete the share network:

openstack share network delete --os-region-name <REGION_NAME> <my-share-network-name>

Note: Ensure no active shares are using the network before deleting it.

10. Troubleshooting

Symptom	Cause	Solution
`Unknown command ['share']`	Manila CLI not installed	Install it with `sudo apt install python3-manilaclient`
`Share network must be set`	Using a DHSS=True share type	Provide `--share-network`
Cannot mount NFS	IP not authorized or wrong network	Ensure VM is in the same private subnet and access rule is created
Share stuck in creating	Invalid network ID or subnet	Check `NETWORK_ID` and `SUBNET_ID`

1. Additional requirements

Helm CLI installed on your local machine.
OpenStack CLI configured and ready to use.
Krew (kubectl plugin manager) installed.
Stern (kubectl log tailing plugin) installed via Krew.
A Kubernetes cluster deployed in a private network within a Public Cloud region where Manila endpoints are accessible.
Ensure that your OpenStack user has the Administrator or Share Operator role.

This guide works with both Managed Kubernetes Service (MKS) clusters and self-managed Kubernetes clusters.

2. Installing Helm command line

curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
chmod 700 get_helm.sh
./get_helm.sh

3. Installing Krew and Stern tools

Run the following command to install Krew in your environment:

(
  set -x; cd "$(mktemp -d)" &&
  OS="$(uname | tr '[:upper:]' '[:lower:]')" &&
  ARCH="$(uname -m | sed -e 's/x86_64/amd64/' -e 's/\(arm\)\(64\)\?.*/\1\2/' -e 's/aarch64$/arm64/')" &&
  KREW="krew-${OS}_${ARCH}" &&
  curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/latest/download/${KREW}.tar.gz" &&
  tar zxvf "${KREW}.tar.gz" &&
  ./"${KREW}" install krew
)
export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"

Once Krew is installed, install Stern with:

kubectl krew install stern

4. Installing OpenStack CLI

Prepare your environment to use the OpenStack API by installing python-openstackclient, following this guide.

Install the Manila client to manage File Storage shares:

pip install python-manilaclient

Don’t forget to update your shell completion script to enable OpenStack share autocompletion.

5. Install the CSI NFS driver

Add the Helm chart repository:

helm repo add csi-driver-nfs https://raw.githubusercontent.com/kubernetes-csi/csi-driver-nfs/master/charts
helm repo update

List available releases of the NFS CSI chart:

helm search repo -l csi-driver-nfs

Install the chosen Helm chart release:

Replace the optional flags --wait -v=5 --debug as needed for debugging or synchronous installation.

helm install csi-driver-nfs csi-driver-nfs/csi-driver-nfs \
  --namespace kube-system \
  --version v4.11.0 \
  [--wait -v=5 --debug]

Follow the NFS CSI logs:

kubectl stern -n kube-system -l app.kubernetes.io/instance=csi-driver-nfs

6. Install the Manila CSI driver

Add the Helm chart repository:

helm repo add cpo https://kubernetes.github.io/cloud-provider-openstack
helm repo update

List available releases of the Manila CSI:

helm search repo -l openstack-manila-csi

Install the chosen Helm chart release:

helm install manila-csi cpo/openstack-manila-csi --version 2.33.1 --namespace kube-system [--values ./csi-config/helm-chart-values.yaml]

Follow the Manila CSI logs:

kubectl stern -n kube-system -l app=openstack-manila-csi

7. Preparing OpenStack resources for Manila CSI

7.1. Create a dedicated OpenStack user for Manila

You need a separate OpenStack user to manage Manila resources. This user can be created:

Through the OVHcloud Control Panel (Public Cloud > Settings > Users & Roles)
Or via the OVHcloud CLI

7.2. Collect OpenStack project and user details

Download your project’s openrc file from the OVHcloud Control Panel and note the following credentials:

os-userName
os-password
os-domainName
os-projectDomainID
os-projectName

Once you have these values, create a file named secrets.yaml with the following content. This Kubernetes Secret allows the Manila CSI driver to authenticate against OpenStack and manage Manila resources in your cluster.

apiVersion: v1
kind: Secret
metadata:
  name: csi-manila-secrets
  namespace: default
stringData:
  # Mandatory
  os-authURL: "https://auth.cloud.ovh.net/v3"
  os-region: "SBG5"

  # Openstack authentication
  os-userName: "<os-userName>"
  os-password: "<os-password>"
  os-domainName: "default"
  os-projectName: "os-projectName"
  os-projectDomainID: "default"

Then, apply it to your Kubernetes cluster:

kubectl apply -f secrets.yaml

7.3. Configure the OpenStack shared network

Manila requires a share network because the driver is configured with DHSS=true (driver_handles_share_servers).

This resource is managed by the owner of the OpenStack project.

# List private networks attached to your MKS cluster
openstack --os-region-name SBG5 network list

# Retrieve the network ID
openstack --os-region-name SBG5 network show -c id -f value <PRIVATE_NETWORK_NAME>

# Retrieve the subnet ID linked to this network
openstack --os-region-name SBG5 subnet show -c id -f value <PRIVATE_SUBNET_NAME>

# Create the Manila share network
openstack --os-region-name SBG5 share network create \
  --name mks-manila-csi-tests \
  --neutron-net-id <PRIVATE_NETWORK_ID> \
  --neutron-subnet-id <PRIVATE_SUBNET_ID>

Example output:

+-----------------------------------+----------------------------------------------------------+
| Field                             | Value                                                    |
+-----------------------------------+----------------------------------------------------------+
| created_at                        | 2025-10-04T14:12:25.111776                               |
| description                       | None                                                     |
| id                                | 07363bc7-be2a-4a7d-b675-09844b344b3b                     |
| name                              | mks-manila-csi-tests                                     |
| network_allocation_update_support | True                                                     |
| project_id                        | <PROJECT_ID>                                             |
| security_service_update_support   | True                                                     |
| share_network_subnets             |                                                          |
|                                   | id = 90cf66fc-23eb-4dce-80a3-bf8fa3a912c3                |
|                                   | availability_zone = None                                 |
|                                   | created_at = 2025-10-04T14:12:25.126327                  |
|                                   | updated_at = None                                        |
|                                   | segmentation_id = None                                   |
|                                   | neutron_net_id = <PRIVATE_NETWORK_NAME>                  |
|                                   | neutron_subnet_id = <PRIVATE_SUBNET_NAME>                |
|                                   | ip_version = None                                        |
|                                   | cidr = None                                              |
|                                   | network_type = None                                      |
|                                   | mtu = None                                               |
|                                   | gateway = None                                           |
| status                            | active                                                   |
| updated_at                        | None                                                     |
+-----------------------------------+----------------------------------------------------------+

8. Configure the Manila CSI driver

Once the OpenStack share network is created, and before configuring the Manila CSI driver, you need to define the CIDR range used by your Kubernetes nodes. This ensures that the nodes can access the Manila shares.

Edit the runtime ConfigMap:

Create a file named manila-runtime-configmap.yaml and update the nfs.matchExportLocationAddress field to match your cluster’s CIDR:

apiVersion: v1
kind: ConfigMap
metadata:
  name: manila-csi-runtimeconf-cm
  namespace: default
  annotations:
    meta.helm.sh/release-name: manila-csi
    meta.helm.sh/release-namespace: default
  labels:
    app.kubernetes.io/managed-by: Helm
data:
  runtimeconfig.json: |
    {
      "nfs": {
        # When mounting an NFS share, select an export location with
        # this IP address. No match between this address and
        # at least a single export location for this share will
        # result in an error.
        # Expects a CIDR-formatted address. If prefix is not provided,
        # /32 or /128 prefix is assumed for IPv4 and IPv6 respectively.
        "matchExportLocationAddress": "<SUBNET_CIDR>"
      }
    }

Example:

"nfs":
  "matchExportLocationAddress": "10.42.0.0/16"

Apply the ConfigMap to your Kubernetes cluster:

# Optional if runtime config is already defined in Helm values
kubectl apply -f manila-runtime-configmap.yaml

9. Creating NFS shares via dynamic provisioning

To enable the Manila CSI driver to dynamically create Manila shares and use them as Kubernetes volumes, you must define a StorageClass in your cluster. This StorageClass specifies the shared network that will be used to create and grant access to NFS exports.

Retrieve the shared network ID, using the OpenStack CLI to get the ID of your shared network:

openstack --os-region-name SBG5 share network list -f value -c ID

Configure the StorageClass:

Create a file named dynamic-storageclass.yaml with the following content:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: csi-manila-nfs
provisioner: nfs.manila.csi.openstack.org
allowVolumeExpansion: true
parameters:
  # Manila share type
  # default value: default
  # openstack share type list to find proper value
  type: standard-1az
  # /!\ MANDATORY /!\
  # openstack share network list
  shareNetworkID: "<OS_SHARE_NETWORK_ID>"
  nfs-shareClient: "<SUBNET_CIDR>"

  csi.storage.k8s.io/provisioner-secret-name: csi-manila-secrets
  csi.storage.k8s.io/provisioner-secret-namespace: default
  csi.storage.k8s.io/controller-expand-secret-name: csi-manila-secrets
  csi.storage.k8s.io/controller-expand-secret-namespace: default
  csi.storage.k8s.io/node-stage-secret-name: csi-manila-secrets
  csi.storage.k8s.io/node-stage-secret-namespace: default
  csi.storage.k8s.io/node-publish-secret-name: csi-manila-secrets
  csi.storage.k8s.io/node-publish-secret-namespace: default

Update the parameter.shareNetworkID value with the shared network identifier.
update the parameter.nfs-shareClient value with the subnet CIDR defined during cluster creation.

Create the dynamic StorageClass, applying the StorageClass to your cluster:

# A StorageClass cannot be updated. If modifications are needed, delete and recreate it.
kubectl apply -f dynamic-storageclass.yaml

Once the StorageClass is created, create a file named nfs-pvc.yaml defining a PersistentVolumeClaim (PVC) that uses this StorageClass. For example, request a 150GiB volume with ReadWriteMany (RWX) access:

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-share-pvc
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 150Gi
  storageClassName: csi-manila-nfs

kubectl apply -f nfs-pvc.yaml

After applying the PVC, list the newly created Manila shares in your Public Cloud project:

openstack --os-region SBG5 share list

Example output:

+--------------------------------------+------------------------------------------+------+-------------+-----------+-----------+-----------------+------+-------------------+
| ID                                   | Name                                     | Size | Share Proto | Status    | Is Public | Share Type Name | Host | Availability Zone |
+--------------------------------------+------------------------------------------+------+-------------+-----------+-----------+-----------------+------+-------------------+
| 9484d5f3-7bf7-486b-b88e-40bbedeet9f3 | pvc-78135a68-c6f4-48fe-8644-454b387a3ad4 |  150 | NFS         | available | False     | standard-1az    |      | nova              |
+--------------------------------------+------------------------------------------+------+-------------+-----------+-----------+-----------------+------+-------------------+

Create a file named nfs-deployment.yaml with the following content:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-share
  labels:
    app: nfs-share
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nfs-share
  template:
    metadata:
      labels:
        app: nfs-share
    spec:
      containers:
      - name: web-server
        resources:
          limits:
            cpu: 250m
            memory: 256Mi
          requests:
            cpu: 100m
            memory: 256Mi
        image: nginx
        imagePullPolicy: IfNotPresent
        volumeMounts:
          - name: nfs-share-pvc
            mountPath: /var/lib/www
      volumes:
      - name: nfs-share-pvc
        persistentVolumeClaim:
          claimName: nfs-share-pvc
          readOnly: false

Deploy the web server with 2 replicas, which will mount and share the previously created RWX volume:

kubectl apply -f nfs-deployment.yaml

You can verify the RWX functionality by connecting to one pod using the kubectl exec command and creating a file in the mounted directory (e.g., /var/lib/www/). Then, connect to the second pod and check that the file is visible. If it is, your Manila share exposed through NFS is functioning correctly.

10. Resize an NFS share using dynamic provisioning

Resizing an NFS share is only supported for:

Dynamically provisioned PersistentVolumeClaims (PVCs)
Unmounted volumes (you must downscale your deployment before resizing to avoid errors)

At this time, only share extension is supported — shrinking a volume is not possible.

To resize an existing Manila share:

Scale down the deployment to ensure the volume is unmounted:

kubectl scale deployment nfs-share --replicas 0

Patch the PVC to request a new size (for example, 42Gi):

kubectl patch pvc nfs-share-pvc -p '{ "spec": { "resources": { "requests": { "storage": "42Gi" }}}}'

Verify that the OpenStack share has been updated:

openstack --os-region SBG5 share show <SHARE_ID>

If the share has been successfully extended, scale the deployment back up:

kubectl scale deployment nfs-share --replicas 2

Attempting to resize a PVC that is not dynamically provisioned by a StorageClass will result in an error such as:

error: persistentvolumeclaims "existing-nfs-share-pvc" could not be patched: persistentvolumeclaims "existing-nfs-share-pvc" is forbidden: only dynamically provisioned pvc can be resized and the storageclass that provisions the pvc must support resize

11. Mounting an existing Manila share as a volume in Pods

As shown earlier, a Kubernetes StorageClass can dynamically create Manila shares exposed via NFS. Alternatively, you can use a pre-provisioned Manila share and mount it directly in a Pod.

Create a new share with the OpenStack CLI:

openstack --os-region SBG5 share create \
  --share-type <SHARE_TYPE> \
  --share-network <SHARE_NETWORK_ID> \
  --name <NFS_SHARE_NAME> \
  SHARE_PROTOCOL SHARE_SIZE

Where:

SHARE_TYPE is standard-1az by default. You can check existing share types with:

openstack --os-region SBG5 share type list

SHARE_NETWORK_ID is the identifier of your shared network.
NFS_SHARE_NAME is the name of your NFS share.
SHARE_PROTOCOL is the protocol to use (currently, only NFS is supported).
SHARE_SIZE is the size to allocate to your NFS volume (in GiB).

Create a share access rule:

openstack --os-region SBG5 share access create <NFS_SHARE_NAME> ip <SUBNET_CIDR>

Where:

SHARE_ACCESS_NAME is the name of the share.
SUBNET_CIDR is the CIDR used when configuring the Manila CSI runtime.

Retrieve the NFS share ID and the share access ID, then create a file named static-provisioning.yaml and update the volumeAttributes.shareID and volumeAttributes.shareAccessID parameters:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: preprovisioned-nfs-share
  labels:
    name: preprovisioned-nfs-share
spec:
  accessModes:
  - ReadWriteMany
  capacity:
    storage: 150Gi
  csi:
    driver: nfs.manila.csi.openstack.org
    volumeHandle: preprovisioned-nfs-share
    nodeStageSecretRef:
      name: csi-manila-secrets
      namespace: default
    nodePublishSecretRef:
      name: csi-manila-secrets
      namespace: default
    volumeAttributes:
      shareID: <SHARE_ID>
      shareAccessID: <SHARE_ACCESS_ID>
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: existing-nfs-share-pvc
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 150Gi
  storageClassName: "" # <--- Prevent default Cinder CSI usage
  selector:
    matchExpressions:
    - key: name
      operator: In
      values: ["preprovisioned-nfs-share"]

Apply the manifest to create a PersistentVolume and its PersistentVolumeClaim using the pre-provisioned NFS share. The Manila share will be used only if the pod claiming the PVC is deployed in your cluster:

kubectl apply -f static-provisioning.yaml

Deploy a pod that mounts this share:

kubectl apply -f pod.yaml

You can now use kubectl exec to access the pod and run df -h to verify that the pre-created Manila share is properly mounted.

Useful CLI

With your OpenStack credentials loaded in the environment, you can manage Manila shares using the OpenStack CLI. Common commands include:

openstack share list # List all shares
openstack share type list # List available share types
openstack share access list|create|delete [${SHARE_ID}] # Manage access rules for a specific share
openstack share list|create|delete [${SHARE_ID}] # Create, list, or delete a share by its ID
openstack share message list # to see error related to Manila resources

Useful resources

Your ReadWriteMany (RWX) Storage in k8s with Manila CSI Manila/Concepts Generic approach for share provisioning Official Manila CSI Plugin on GitHub

1. Additional requirements

You already have a working Terraform environment.

You can find useful examples here

2. Declare the OpenStack provider

Add the following configuration to your main.tf to specify the required Terraform providers:

vim main.tf

terraform {
  required_providers {
    ovh = {
      source  = "ovh/ovh"
    }

    openstack = {
      source  = "terraform-provider-openstack/openstack"
    }
  }
}

This block ensures that Terraform uses the correct providers for managing OVH and OpenStack resources.

3. Retrieve information about your private network

Add the following blocks to your main.tf file to fetch details about your private network and subnet:

data "openstack_networking_network_v2" "private_network" {
  name   = "<YOUR_PRIVATE_NETWORK_NAME>"
  region = "<YOUR_REGION_NAME>"
}

data "openstack_networking_subnet_v2" "private_subnet" {
  name   = "<YOUR_PRIVATE_SUBNET_NAME>"
  region = "<YOUR_REGION_NAME>"
}

These data blocks allow Terraform to query OpenStack and retrieve the necessary details of your private network and subnet, which are required for configuring the File Storage service.

4. Create a share network

Add the following resource to your main.tf to create a share network for your File Storage service:

resource "openstack_sharedfilesystem_sharenetwork_v2" "sharenetwork" {
  name              = "<YOUR_SHARE_NETWORK_NAME>"
  region            = "<YOUR_REGION_NAME>"
  neutron_net_id    = data.openstack_networking_network_v2.private_network.id
  neutron_subnet_id = data.openstack_networking_subnet_v2.private_subnet.id
}

This resource creates a share network in OpenStack, associating it with your existing private network and subnet. It is required to provision and manage shared file systems.

5. Create an NFS share

Add the following resource to your main.tf to create an NFS share on your File Storage service:

vim main.tf


resource "openstack_sharedfilesystem_share_v2" "share" {
  name             = "<YOUR_SHARE_NAME>"
  region           = "<YOUR_REGION_NAME>"
  share_type       = "standard-1az"
  share_proto      = "NFS"
  size             = 150
  share_network_id = openstack_sharedfilesystem_sharenetwork_v2.sharenetwork.id
}

This resource provisions an NFS share in OpenStack, linked to the previously created share network. Adjust the size and share_type according to your requirements.

6. Authorize a client VM

Ensure that your client VM is connected to the same private network as your share.

Retrieve the VM's private IP address:

openstack server show --os-region-name <YOUR_REGION_NAME> <YOUR_CLIENT_VM_NAME> -c addresses -f value

Example output:

{'my-private-net': ['10.1.0.123', '57.123.88.111']}

Use the private IP (e.g., 10.1.0.123) to grant access to the NFS share:

resource "openstack_sharedfilesystem_share_access_v2" "share_access" {
  share_id     = openstack_sharedfilesystem_share_v2.share.id
  region       = "<YOUR_REGION_NAME>"
  access_type  = "ip"
  access_to    = "10.1.0.123"
  access_level = "rw"
}

This resource authorizes the specified client VM to access the NFS share with read/write permissions.

7. Retrieve the export path

Add the following output block to your main.tf to retrieve the NFS share export path:

output "export_path" {
  value = openstack_sharedfilesystem_share_v2.share.export_locations[0].path
}

This output provides the NFS export path, which can be used by client VMs to mount the share.

8. Mount the share on your client VM

Connect to your client VM and install the necessary NFS utilities:

sudo apt update && sudo apt install -y nfs-common

Create a mount point and mount the share:

sudo mkdir -p /mnt/share
sudo mount -t nfs4 <NFS_EXPORT_PATH> /mnt/share

Replace with the export path retrieved from Terraform (e.g., 10.1.0.12:/shares/share-abc12345-def6-4abc-8def-123456abcdef).

Verify the mount:

df -h /mnt/share

Make the mount persistent across reboots:

echo "<NFS_EXPORT_PATH> /mnt/share nfs nfsvers=4 defaults,noauto 0 0" | sudo tee -a /etc/fstab

This ensures your NFS share is automatically remounted after the VM restarts.

9. Check capacity and usage

Once the NFS share is mounted, you can verify its available space and usage:

df -h /mnt/share

Example output:

Filesystem                          Size  Used  Avail Use% Mounted on
10.1.0.12:/shares/share-abc1...     150G  100M   150G   1% /mnt/share

This command shows the total size, used space, and available space on your mounted NFS share.

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