Accessing NAS from VMs and Containers
Virtual Machines and Containers in TrueNAS 25.04TrueNAS 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.
Virtual machines in 25.04.2 (or later) are created and appear on the Virtual Machines screen.
VMs created in 25.04.0 or 25.04.1 using the Instances feature continue to function and appear on the Containers screen.
Configuring Virtualization and Apps
Configuring TrueNAS to work with virtualized features, such as virtual machines (VMs) and applications, is part of the setup process that, when optimized, takes advantage of the network storage capabilities that TrueNAS offers.
This article assumes you have the latest release version of TrueNAS installed on your system. The following steps are a list of configuration prerequisites you have completed and are familiar with before beginning VM and application installations.
Isolating GPU for VMs
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.
Advanced Settings Screen
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, NTP servers, allowed IP addresses, isolated GPU device(s), self-encrypting drives, and global two-factor authentication.