After creating a VM, the next step is to add virtual devices for that VM. Using the Create Virtual Machine wizard, configure at least one disk, NIC, and display as part of the process. To add devices, from the Virtual Machines screen, click anywhere on a VM entry to expand it and show the options for the VM.
Advanced settings have reasonable defaults in place. A warning message displays for some settings advising of the dangers of making changes. Changing advanced settings can be dangerous when done incorrectly. Use caution before saving changes.
Make sure you are comfortable with ZFS, Linux, and system configuration, backup, and restoration before making any changes.
The Advanced Settings screen provides configuration options for the console, syslog, audit, kernel, sysctl, storage (system dataset pool), replication, WebSocket sessions, cron jobs, init/shutdown scripts, allowed IP addresses, isolated GPU device(s), self-encrypting drives, and global two-factor authentication.
Systems with more than one graphics processing unit (GPU) installed can isolate additional GPU device(s) from the host operating system (OS) and allocate them for use by a virtual machine (VM). Isolated GPU devices are unavailable to the OS and for allocation to applications.
Advanced settings have reasonable defaults in place. A warning message displays for some settings advising of the dangers of making changes. Changing advanced settings can be dangerous when done incorrectly. Use caution before saving changes.
Virtual Machines
TrueNAS 25.04 introduces support for Containers (Linux system containers), enabling lightweight isolation similar to jails in TrueNAS CORE.
TrueNAS 25.04.2 reintroduces “classic virtualization” with the Virtual Machines feature.
VMs created in 25.04.0 or 25.04.1 using the Instances feature continue to function and appear on the Containers screen.
Virtual machines in 25.04.2 (or later) are created and appear on the Virtual Machines screen.
