systemd-detect-virt Man page

SYSTEMD-DETECT-VIRT(1) systemd-detect-virt SYSTEMD-DETECT-VIRT(1)

NAME

systemd-detect-virt – Detect execution in a virtualized environment

SYNOPSIS

systemd-detect-virt [OPTIONS…]

DESCRIPTION

systemd-detect-virt detects execution in a virtualized environment. It
identifies the virtualization technology and can distinguish full
machine virtualization from container virtualization.
systemd-detect-virt exits with a return value of 0 (success) if a
virtualization technology is detected, and non-zero (error) otherwise.
By default, any type of virtualization is detected, and the options
–container and –vm can be used to limit what types of virtualization
are detected.

When executed without –quiet will print a short identifier for the
detected virtualization technology. The following technologies are
currently identified:

Table 1. Known virtualization technologies (both VM, i.e. full hardware
virtualization, and container, i.e. shared kernel virtualization)
┌──────────┬────────────────┬─────────────────────┐
│Type │ ID │ Product │
├──────────┼────────────────┼─────────────────────┤
│VM │ qemu │ QEMU software │
│ │ │ virtualization │
│ ├────────────────┼─────────────────────┤
│ │ kvm │ Linux KVM kernel │
│ │ │ virtual machine │
│ ├────────────────┼─────────────────────┤
│ │ zvm │ s390 z/VM │
│ ├────────────────┼─────────────────────┤
│ │ vmware │ VMware Workstation │
│ │ │ or Server, and │
│ │ │ related products │
│ ├────────────────┼─────────────────────┤
│ │ microsoft │ Hyper-V, also known │
│ │ │ as Viridian or │
│ │ │ Windows Server │
│ │ │ Virtualization │
│ ├────────────────┼─────────────────────┤
│ │ oracle │ Oracle VM │
│ │ │ VirtualBox │
│ │ │ (historically │
│ │ │ marketed by innotek │
│ │ │ and Sun │
│ │ │ Microsystems) │
│ ├────────────────┼─────────────────────┤
│ │ xen │ Xen hypervisor │
│ │ │ (only domU, not │
│ │ │ dom0) │
│ ├────────────────┼─────────────────────┤
│ │ bochs │ Bochs Emulator │
│ ├────────────────┼─────────────────────┤
│ │ uml │ User-mode Linux │
│ ├────────────────┼─────────────────────┤
│ │ parallels │ Parallels Desktop, │
│ │ │ Parallels Server │
├──────────┼────────────────┼─────────────────────┤
│Container │ openvz │ OpenVZ/Virtuozzo │
│ ├────────────────┼─────────────────────┤
│ │ lxc │ Linux container │
│ │ │ implementation by │
│ │ │ LXC │
│ ├────────────────┼─────────────────────┤
│ │ lxc-libvirt │ Linux container │
│ │ │ implementation by │
│ │ │ libvirt │
│ ├────────────────┼─────────────────────┤
│ │ systemd-nspawn │ systemd’s minimal │
│ │ │ container │
│ │ │ implementation, see │
│ │ │ systemd-nspawn(1) │
│ ├────────────────┼─────────────────────┤
│ │ docker │ Docker container │
│ │ │ manager │
│ ├────────────────┼─────────────────────┤
│ │ rkt │ rkt app container │
│ │ │ runtime │
└──────────┴────────────────┴─────────────────────┘

If multiple virtualization solutions are used, only the “innermost” is
detected and identified. That means if both machine and container
virtualization are used in conjunction, only the latter will be
identified (unless –vm is passed).

OPTIONS

The following options are understood:

-c, –container
Only detects container virtualization (i.e. shared kernel
virtualization).

-v, –vm
Only detects hardware virtualization).

-r, –chroot
Detect whether invoked in a chroot environment. In this mode, no
output is written, but the return value indicates whether the
process was invoked in a chroot() environment or not.

-q, –quiet
Suppress output of the virtualization technology identifier.

-h, –help
Print a short help text and exit.

–version
Print a short version string and exit.

EXIT STATUS
If a virtualization technology is detected, 0 is returned, a non-zero
code otherwise.

SEE ALSO

systemd, systemd-nspawn(1), chroot

systemd 229 SYSTEMD-DETECT-VIRT(1)

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