Mounting QNAP NAS NFS Backup Storage on Proxmox Backup Server

If you are using Proxmox Backup Server (PBS) and want to securely store backups on a QNAP NAS via NFS, follow this step-by-step guide to ensure a smooth integration.

1. Create NFS Share on QNAP

1. Log in to your QNAP NAS web interface and create a shared folder, e.g., PBSBackup.
2. Go to “Permissions” → NFS Access tab.
3. Add your PBS server’s IP address (e.g., 192.168.1.100).
4. Set access type to Read-Write (RW) and enable no_root_squash.
5. Ensure NFSv3 is selected (recommended for PBS compatibility).

2. Mount the NFS Share on PBS

Install required package:

apt update && apt install nfs-common -y

Create a mount point:

mkdir -p /mnt/qnap-backup

Mount the NFS share using NFSv3:

mount -t nfs -o vers=3 192.168.1.50:/share/PBSBackup /mnt/qnap-backup

Add persistent mount to /etc/fstab:

192.168.1.50:/share/PBSBackup  /mnt/qnap-backup  nfs  defaults,_netdev,nofail,x-systemd.automount  0  0

3. Create a Directory for PBS Datastore

mkdir /mnt/qnap-backup/proxmox-backup

Set correct ownership for PBS access:

chown backup:backup /mnt/qnap-backup/proxmox-backup
chmod 700 /mnt/qnap-backup/proxmox-backup

4. Add the Directory in PBS Web Interface

1. Log in to PBS Web UI at https://pbs.example.com:8007.
2. Go to Datastore → Add → Directory.
3. Set Backing Path as: /mnt/qnap-backup/proxmox-backup.
4. Give your datastore a name (e.g., QNAP-NFS) and save it.

5. Test Write Access

Test if the PBS backup user can write to the directory:

sudo -u backup touch /mnt/qnap-backup/proxmox-backup/testfile

Afterward, try creating a test backup in PBS and verify that it appears on your QNAP NAS.

Extra Tips & Troubleshooting

• Run showmount -e 192.168.1.50 to confirm NFS exports.
• If you see Permission denied, check UID/GID compatibility and firewall settings.
• Ensure NFS port access is allowed from PBS to QNAP.