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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | SEE ALSO | COLOPHON |
SYSTEMD-DETECT-VIRT(1) systemd-detect-virt SYSTEMD-DETECT-VIRT(1)
systemd-detect-virt - Detect execution in a virtualized environment
systemd-detect-virt [OPTIONS...]
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, │
│ │ │ without KVM │
│ ├────────────────┼─────────────────────┤
│ │ kvm │ Linux KVM kernel │
│ │ │ virtual machine, │
│ │ │ with whatever │
│ │ │ software, except │
│ │ │ Oracle │
│ │ │ Virtualbox │
│ ├────────────────┼─────────────────────┤
│ │ 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), │
│ │ │ for │
│ │ │ legacy and KVM │
│ │ │ hypervisor │
│ ├────────────────┼─────────────────────┤
│ │ xen │ Xen hypervisor │
│ │ │ (only domU, not │
│ │ │ dom0) │
│ ├────────────────┼─────────────────────┤
│ │ bochs │ Bochs Emulator │
│ ├────────────────┼─────────────────────┤
│ │ uml │ User-mode Linux │
│ ├────────────────┼─────────────────────┤
│ │ parallels │ Parallels Desktop, │
│ │ │ Parallels Server │
│ ├────────────────┼─────────────────────┤
│ │ bhyve │ bhyve, FreeBSD │
│ │ │ hypervisor │
├──────────┼────────────────┼─────────────────────┤
│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).
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(2) environment. In this mode,
no output is written, but the return value indicates whether the
process was invoked in a chroot() environment or not.
--private-users
Detect whether invoked in a user namespace. In this mode, no
output is written, but the return value indicates whether the
process was invoked inside of a user namespace or not. See
user_namespaces(7) for more information.
-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.
If a virtualization technology is detected, 0 is returned, a non-zero
code otherwise.
systemd(1), systemd-nspawn(1), chroot(2), namespaces(7)
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systemd 234 SYSTEMD-DETECT-VIRT(1)
Pages that refer to this page: systemd.unit(5), systemd.directives(7), systemd.index(7)