Proxmox Backup Server (PBS) - Backups via NAS to GDrive (Decoupled, Monitored & Encrypted)#

This guide is intended for off-site disaster recovery (DR) copies, not as a primary backup destination.

This documentation covers a decoupled, stage-based architecture: The PBS Method (Deduplicated Datastore on NAS): The Proxmox Backup Server (PBS) host HP1BackupServer (10.1.1.211) mounts a local NAS share under proper system ownership (uid=34) to run a fully deduplicated backup datastore. A dedicated sync container MMDocker (10.1.2.230) mounts the same share to asynchronously push the deduplicated chunk structure to Google Drive via an optimized rclone sync script.

Proxmox Backup Server - Mounting an SMB NAS Share as a PBS Datastore#

This note outlines the step-by-step process used to mount a remote SMB/Samba share from a NAS onto a Proxmox Backup Server (PBS) host at the OS level, assign proper permissions for the PBS daemon, and initialize it as a new backup datastore.

Prerequisites#

• A target share on the NAS (e.g., //10.1.2.2/ProxmoxBackups).
• An existing SMB credentials file on the PBS host (e.g., /root/.smb_credentials).

Step-by-Step Implementation#

Step 1: Create the Local Mount Directory#

Create a dedicated folder at the root of the PBS host filesystem where the network share will be attached.

Proxmox Backup Server (PBS)#

1 Installation & Post-Install#

1.1 Post-Install Optimization#

Run this script to configure repositories and optimize settings:

bash -c "$(wget -qLO - [https://github.com/community-scripts/ProxmoxVE/raw/main/misc/post-pbs-install.sh](https://github.com/community-scripts/ProxmoxVE/raw/main/misc/post-pbs-install.sh))"

1.2 Install File Browser#

bash -c "$(wget -qLO - [https://github.com/tteck/Proxmox/raw/main/misc/filebrowser.sh](https://github.com/tteck/Proxmox/raw/main/misc/filebrowser.sh))"

2 Setup VM with SMB Datastore#

2.1 Create Mount Directory#

mkdir /mnt/HP1ProxmoxBackupServer

2.2 Configure Credentials#

nano /etc/samba/.smbcreds

File Content:

username=proxmox
password=private

2.3 Set Permissions#

Change permission to Read-Only by root:

chmod 400 /etc/samba/.smbcreds

2.4 Manual Mount Test#

mount -t cifs -o rw,vers=3.0,credentials=/etc/samba/.smbcreds,uid=34,gid=34 //10.1.1.225/HP1ProxmoxBackupServer /mnt/HP1ProxmoxBackupServer

2.5 Permanent Mount (fstab)#

nano /etc/fstab

Add line: