2. Installation

Source: PBS on Truenas by Lawrence Systems 
 Alright! So you have chosen to install PBS on top of a TrueNas Scale bare metal instance. Well we don't need to go through installing TrueNas scale since you have already don that here  Installing TrueNas Scale. Okey so you have your TrueNas scale up and running then this will be the steps 
 Creating a generic dataset for your PBS container 
 
 Log in to your TrueNAS Web UI . 
 Navigate to Datasets on the left sidebar. 
 Select the parent dataset or pool where you want the backups to live. 
 Click Add Dataset (top right). 
 Name: pbs-storage (or your preferred name). 
 Dataset Preset: Select Generic . 
 
 Click Save . 
 
 
 In TrueNAS Create the Subdirectory and Set ACLs 
 Working in a subdirectory prevents PBS from conflicting with any special folders and let’s set and limit user permission. We will perform this in the TrueNAS Shell . 
 
 Go to System Settings → Shell or use SSH 
 If using the web shell use sudo of if you are not root user 
 Go into the new dataset cd /mnt/tank/pbs-storage/ 
 Create the directory: mkdir datastore1 
 Set Backup Owner For Container chown -R 2147000035:2147000035 datastore1 
 Apply the Access ACL & Default ACL (Inheritance): setfacl -m u:2147000035:rwx,d:u:2147000035:rwx datastore1 
 
 
 Where do the permissions come from ? 
 In TrueNAS 25, the default mapping for unprivileged containers starts at 2147000001 . 
 
 Base ID: 2147000001 (This is the “Start” of the container’s world). 
 Root (0) inside the container: 2147000001 + 0 = 2147000001 on the Host. 
 Backup (34) inside the container: 2147000001 + 34 = 2147000035 on the Host. 
 Standard User (1000) inside the container: 2147000001 + 1000 = 2147010001 on the Host. 
 
 
 
 
 
 
 If you are… 
 ID in the Container 
 ID on the TrueNAS Host 
 
 
 
 
 Root User 
 0 
 2147000001 
 
 
 PBS Backup User 
 34 
 2147000035 
 
 
 Standard User 
 1000 
 2147010001 
 
 
 
 
 
 
 
 
 Truenas VM with virtual drives 
 If you want to go the virtual drive route then there is one little tweak that you need  to make for TrueNas VM to recognize different drives.  
 
 Go your backup PVE's shell and nano into /etc/pve/qemu-server/VM-ID.conf 
 In here you want to add serial numbers to the disks that you added to the VM 
 This does not need to be complicated, they just need to be different for each drive. For instance you could use serial=DRIVE00X for each drive and changing X for each added drive. For instance with two drives it looks like this  
 
 scsi0: local-zfs:vm-1002-disk-0,discard=on,iothread=1,size=12G,ssd=1,serial=DISK001
scsi1: tank:vm-1002-disk-1,discard=on,iothread=1,size=2000G,ssd=1,serial=DISK002