systemd-detect-virt.xml 5.51 KB
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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

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  Copyright 2010 Lennart Poettering

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<refentry id="systemd-detect-virt"
          xmlns:xi="http://www.w3.org/2001/XInclude">
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        <refentryinfo>
                <title>systemd-detect-virt</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Developer</contrib>
                                <firstname>Lennart</firstname>
                                <surname>Poettering</surname>
                                <email>lennart@poettering.net</email>
                        </author>
                </authorgroup>
        </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 <arg choice="opt" rep="repeat">OPTIONS</arg></command>
                </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
                VM virtualization from container
                virtualization.</para>

                <para>When executed without <option>--quiet</option>
                will print a short identifier for the detected
                virtualization technology. The following technologies
                are currently identified: <varname>qemu</varname>,
                <varname>kvm</varname>, <varname>vmware</varname>,
                <varname>microsoft</varname>,
                <varname>oracle</varname>, <varname>xen</varname>,
                <varname>bochs</varname>, <varname>chroot</varname>,
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                <varname>uml</varname>,
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                <varname>openvz</varname>, <varname>lxc</varname>,
                <varname>lxc-libvirt</varname>,
                <varname>systemd-nspawn</varname>.</para>

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                <para>If multiple virtualization solutions are used,
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                only the "innermost" is detected and identified. That
                means if both VM virtualization and container
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                virtualization are used in conjunction, only the latter
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                will be identified (unless <option>--vm</option> is
                passed).</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 VM
                                virtualization (i.e. full hardware
                                virtualization).</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>

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                        <xi:include href="standard-options.xml" xpointer="help" />
                        <xi:include href="standard-options.xml" xpointer="version" />
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                </variablelist>

        </refsect1>

        <refsect1>
                <title>Exit status</title>

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                <para>If a virtualization technology is detected, 0 is
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                returned, a non-zero code otherwise.</para>
        </refsect1>

        <refsect1>
                <title>See Also</title>
                <para>
                        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                </para>
        </refsect1>

</refentry>