For the [tutorial](https://github.com/OpenCHAMI/tutorial-2025), we served images via HTTP with a local S3 bucket using MinIO and an OCI registry. We could instead serve our images by network mounting the directories that hold our images with NFS. We can spin up a NFS server on the head node by including NFS tools in our base image and configure our nodes to mount the images.

Configure NFS to serve your SquashFS `nfsroot` with as much performance as possible.

```bash
sudo mkdir -p /opt/nfsroot && sudo chown rocky /opt/nfsroot
```

Create a file at path `/etc/exports` and copy the following contents to export the `/opt/nfsroot` directory for use by our compute nodes.

```bash
/opt/nfsroot *(ro,no_root_squash,no_subtree_check,noatime,async,fsid=0)
```

Reload the NFS daemon to apply the changes.

```bash
modprobe -r nfsd && modprobe nfsd
```

For NFS, we need to update the /etc/exports file and then reload the kernel nfs daemon

Create `/opt/nfsroot` to serve our images

```bash
sudo mkdir /srv/nfs
sudo chown rocky: /srv/nfs
```

  - Create the `/etc/exports` file with the following contents to export the `/srv/nfs` directory for use by our compute nodes
    ```bash
    /srv/nfs *(ro,no_root_squash,no_subtree_check,noatime,async,fsid=0)
    ```

  - Reload the nfs daemon
    ```bash
    sudo modprobe -r nfsd && sudo modprobe nfsd
    ```

### Webserver for Boot Artifacts

We expose our NFS directory over https as well to make it easy to serve boot artifacts.

```yaml
# nginx.container
[Unit]
Description=Serve /srv/nfs over HTTP
After=network-online.target
Wants=network-online.target

[Container]
ContainerName=nginx
Image=docker.io/library/nginx:1.28-alpine
Volume=/srv/nfs:/usr/share/nginx/html:Z
PublishPort=80:80

[Service]
TimeoutStartSec=0
Restart=always
```

### Import Images from OCI to Share with NFS

[Import-image Script](https://github.com/OpenCHAMI/image-builder/blob/main/scripts/image-import.sh)