「systemd-detect-virt」-

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

命令语法格式


systemd-detect-virt [OPTIONS…]

命令描述


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 │

│ ├────────────────┼────────────────────────────────────────────────────────────┤

│ │ 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).

命令支持的选项及含义


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.

退出状态


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

相关手册


systemd(1), systemd-nspawn(1), chroot(2), namespaces(7)

参考文献


  • man 1 systemd-detect-virt, Version systemd 232

更新日志


  • 07/26/2018 创建文章