mirror of
https://github.com/systemd/systemd.git
synced 2024-12-19 15:13:36 +08:00
b6eca3731d
Amazon EC2 Nitro hypervisor is technically based on KVM[1], which
systemd-detect-virt identify propely from CPUID. However the lack of
CPUID on aarch64 (A1, T4 instance type) prevents a correct
identification, impacting hostnamectl and systemd-random-seed. Instead
it's possible to identify virtualization from DMI vendor ID.
Prior to this commit:
# hostnamectl
Static hostname: n/a
Transient hostname: ip-10-97-8-12
Icon name: computer
Machine ID: 8e3772fbcfa3dd6f330a12ff5df5a63b
Boot ID: b7b7e2fe0079448db664839df59f9817
Operating System: Gentoo/Linux
Kernel: Linux 5.4.69-longterm
Architecture: arm64
After this commit:
# hostnamectl
Static hostname: n/a
Transient hostname: ip-10-97-8-12
Icon name: computer-vm
Chassis: vm
Machine ID: 8e3772fbcfa3dd6f330a12ff5df5a63b
Boot ID: bd04da57084e41078f20541101867113
Virtualization: amazon
Operating System: Gentoo/Linux
Kernel: Linux 5.4.69-longterm
Architecture: arm64
[1] https://aws.amazon.com/ec2/faqs/
288 lines
10 KiB
XML
288 lines
10 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
|
|
|
|
<refentry id="systemd-detect-virt"
|
|
xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>systemd-detect-virt</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>systemd-detect-virt</refentrytitle>
|
|
<manvolnum>1</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd-detect-virt</refname>
|
|
<refpurpose>Detect execution in a virtualized environment</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<cmdsynopsis>
|
|
<command>systemd-detect-virt</command>
|
|
<arg choice="opt" rep="repeat">OPTIONS</arg>
|
|
</cmdsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><command>systemd-detect-virt</command> detects execution in
|
|
a virtualized environment. It identifies the virtualization
|
|
technology and can distinguish full machine virtualization from
|
|
container virtualization. <filename>systemd-detect-virt</filename>
|
|
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
|
|
<option>--container</option> and <option>--vm</option> can be used
|
|
to limit what types of virtualization are detected.</para>
|
|
|
|
<para>When executed without <option>--quiet</option> will print a
|
|
short identifier for the detected virtualization technology. The
|
|
following technologies are currently identified:</para>
|
|
|
|
<table>
|
|
<title>Known virtualization technologies (both
|
|
VM, i.e. full hardware virtualization,
|
|
and container, i.e. shared kernel virtualization)</title>
|
|
<tgroup cols='3' align='left' colsep='1' rowsep='1'>
|
|
<colspec colname="type" />
|
|
<colspec colname="id" />
|
|
<colspec colname="product" />
|
|
<thead>
|
|
<row>
|
|
<entry>Type</entry>
|
|
<entry>ID</entry>
|
|
<entry>Product</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry valign="top" morerows="13">VM</entry>
|
|
<entry><varname>qemu</varname></entry>
|
|
<entry>QEMU software virtualization, without KVM</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>kvm</varname></entry>
|
|
<entry>Linux KVM kernel virtual machine, in combination with QEMU. Not used for other virtualizers using the KVM interfaces, such as Oracle VirtualBox or Amazon EC2 Nitro, see below.</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>amazon</varname></entry>
|
|
<entry>Amazon EC2 Nitro using Linux KVM</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>zvm</varname></entry>
|
|
<entry>s390 z/VM</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>vmware</varname></entry>
|
|
<entry>VMware Workstation or Server, and related products</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>microsoft</varname></entry>
|
|
<entry>Hyper-V, also known as Viridian or Windows Server Virtualization</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>oracle</varname></entry>
|
|
<entry>Oracle VM VirtualBox (historically marketed by innotek and Sun Microsystems), for legacy and KVM hypervisor</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>powervm</varname></entry>
|
|
<entry>IBM PowerVM hypervisor — comes as firmware with some IBM POWER servers</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>xen</varname></entry>
|
|
<entry>Xen hypervisor (only domU, not dom0)</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>bochs</varname></entry>
|
|
<entry>Bochs Emulator</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>uml</varname></entry>
|
|
<entry>User-mode Linux</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>parallels</varname></entry>
|
|
<entry>Parallels Desktop, Parallels Server</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>bhyve</varname></entry>
|
|
<entry>bhyve, FreeBSD hypervisor</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>qnx</varname></entry>
|
|
<entry>QNX hypervisor</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>acrn</varname></entry>
|
|
<entry><ulink url="https://projectacrn.org">ACRN hypervisor</ulink></entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry valign="top" morerows="9">Container</entry>
|
|
<entry><varname>openvz</varname></entry>
|
|
<entry>OpenVZ/Virtuozzo</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>lxc</varname></entry>
|
|
<entry>Linux container implementation by LXC</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>lxc-libvirt</varname></entry>
|
|
<entry>Linux container implementation by libvirt</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>systemd-nspawn</varname></entry>
|
|
<entry>systemd's minimal container implementation, see <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry></entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>docker</varname></entry>
|
|
<entry>Docker container manager</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>podman</varname></entry>
|
|
<entry><ulink url="https://podman.io">Podman</ulink> container manager</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>rkt</varname></entry>
|
|
<entry>rkt app container runtime</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>wsl</varname></entry>
|
|
<entry><ulink url="https://docs.microsoft.com/en-us/windows/wsl/about">Windows Subsystem for Linux</ulink></entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>proot</varname></entry>
|
|
<entry><ulink url="https://proot-me.github.io/">proot</ulink> userspace chroot/bind mount emulation</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry><varname>pouch</varname></entry>
|
|
<entry><ulink url="https://github.com/alibaba/pouch">Pouch</ulink> Container Engine</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
|
|
<para>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
|
|
<option>--vm</option> is passed).</para>
|
|
<para> Windows Subsystem for Linux is not a Linux container,
|
|
but an environment for running Linux userspace applications on
|
|
top of the Windows kernel using a Linux-compatible interface.
|
|
WSL is categorized as a container for practical purposes.
|
|
Multiple WSL environments share the same kernel and services
|
|
should generally behave like when being run in a container.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Options</title>
|
|
|
|
<para>The following options are understood:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><option>-c</option></term>
|
|
<term><option>--container</option></term>
|
|
|
|
<listitem><para>Only detects container virtualization (i.e.
|
|
shared kernel virtualization).</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-v</option></term>
|
|
<term><option>--vm</option></term>
|
|
|
|
<listitem><para>Only detects hardware virtualization.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-r</option></term>
|
|
<term><option>--chroot</option></term>
|
|
|
|
<listitem><para>Detect whether invoked in a
|
|
<citerefentry><refentrytitle>chroot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
|
environment. In this mode, no output is written, but the return
|
|
value indicates whether the process was invoked in a
|
|
<function>chroot()</function>
|
|
environment or not.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--private-users</option></term>
|
|
|
|
<listitem><para>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
|
|
<citerefentry project='man-pages'><refentrytitle>user_namespaces</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
for more information.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-q</option></term>
|
|
<term><option>--quiet</option></term>
|
|
|
|
<listitem><para>Suppress output of the virtualization
|
|
technology identifier.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--list</option></term>
|
|
|
|
<listitem><para>Output all currently known and detectable container and VM environments.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<xi:include href="standard-options.xml" xpointer="help" />
|
|
<xi:include href="standard-options.xml" xpointer="version" />
|
|
</variablelist>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Exit status</title>
|
|
|
|
<para>If a virtualization technology is detected, 0 is returned, a
|
|
non-zero code otherwise.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>chroot</refentrytitle><manvolnum>2</manvolnum></citerefentry>,
|
|
<citerefentry project='man-pages'><refentrytitle>namespaces</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|