mirror of
https://github.com/systemd/systemd.git
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1054 lines
47 KiB
XML
1054 lines
47 KiB
XML
<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
|
||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||
|
||
<!--
|
||
This file is part of systemd.
|
||
|
||
Copyright 2013 Zbigniew Jędrzejewski-Szmek
|
||
|
||
systemd is free software; you can redistribute it and/or modify it
|
||
under the terms of the GNU Lesser General Public License as published by
|
||
the Free Software Foundation; either version 2.1 of the License, or
|
||
(at your option) any later version.
|
||
|
||
systemd is distributed in the hope that it will be useful, but
|
||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
Lesser General Public License for more details.
|
||
|
||
You should have received a copy of the GNU Lesser General Public License
|
||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||
-->
|
||
|
||
<refentry id="machinectl" conditional='ENABLE_MACHINED'
|
||
xmlns:xi="http://www.w3.org/2001/XInclude">
|
||
|
||
<refentryinfo>
|
||
<title>machinectl</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>machinectl</refentrytitle>
|
||
<manvolnum>1</manvolnum>
|
||
</refmeta>
|
||
|
||
<refnamediv>
|
||
<refname>machinectl</refname>
|
||
<refpurpose>Control the systemd machine manager</refpurpose>
|
||
</refnamediv>
|
||
|
||
<refsynopsisdiv>
|
||
<cmdsynopsis>
|
||
<command>machinectl</command>
|
||
<arg choice="opt" rep="repeat">OPTIONS</arg>
|
||
<arg choice="req">COMMAND</arg>
|
||
<arg choice="opt" rep="repeat">NAME</arg>
|
||
</cmdsynopsis>
|
||
</refsynopsisdiv>
|
||
|
||
<refsect1>
|
||
<title>Description</title>
|
||
|
||
<para><command>machinectl</command> may be used to introspect and
|
||
control the state of the
|
||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
virtual machine and container registration manager
|
||
<citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
|
||
|
||
<para><command>machinectl</command> may be used to execute
|
||
operations on machines and images. Machines in this sense are
|
||
considered running instances of:</para>
|
||
|
||
<itemizedlist>
|
||
<listitem><para>Virtual Machines (VMs) that virtualize hardware
|
||
to run full operating system (OS) instances (including their kernels)
|
||
in a virtualized environment on top of the host OS.</para></listitem>
|
||
|
||
<listitem><para>Containers that share the hardware and
|
||
OS kernel with the host OS, in order to run
|
||
OS userspace instances on top the host OS.</para></listitem>
|
||
|
||
<listitem><para>The host system itself</para></listitem>
|
||
</itemizedlist>
|
||
|
||
<para>Machines are identified by names that follow the same rules
|
||
as UNIX and DNS host names, for details, see below. Machines are
|
||
instantiated from disk or file system images that frequently — but not
|
||
necessarily — carry the same name as machines running from
|
||
them. Images in this sense are considered:</para>
|
||
|
||
<itemizedlist>
|
||
<listitem><para>Directory trees containing an OS, including its
|
||
top-level directories <filename>/usr</filename>,
|
||
<filename>/etc</filename>, and so on.</para></listitem>
|
||
|
||
<listitem><para>btrfs subvolumes containing OS trees, similar to
|
||
normal directory trees.</para></listitem>
|
||
|
||
<listitem><para>Binary "raw" disk images containing MBR or GPT
|
||
partition tables and Linux file system partitions.</para></listitem>
|
||
|
||
<listitem><para>The file system tree of the host OS itself.</para></listitem>
|
||
</itemizedlist>
|
||
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Options</title>
|
||
|
||
<para>The following options are understood:</para>
|
||
|
||
<variablelist>
|
||
<varlistentry>
|
||
<term><option>-p</option></term>
|
||
<term><option>--property=</option></term>
|
||
|
||
<listitem><para>When showing machine or image properties,
|
||
limit the output to certain properties as specified by the
|
||
argument. If not specified, all set properties are shown. The
|
||
argument should be a property name, such as
|
||
<literal>Name</literal>. If specified more than once, all
|
||
properties with the specified names are
|
||
shown.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>-a</option></term>
|
||
<term><option>--all</option></term>
|
||
|
||
<listitem><para>When showing machine or image properties, show
|
||
all properties regardless of whether they are set or
|
||
not.</para>
|
||
|
||
<para>When listing VM or container images, do not suppress
|
||
images beginning in a dot character
|
||
(<literal>.</literal>).</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>-l</option></term>
|
||
<term><option>--full</option></term>
|
||
|
||
<listitem><para>Do not ellipsize process tree entries.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--no-ask-password</option></term>
|
||
|
||
<listitem><para>Do not query the user for authentication for
|
||
privileged operations.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--kill-who=</option></term>
|
||
|
||
<listitem><para>When used with <command>kill</command>, choose
|
||
which processes to kill. Must be one of
|
||
<option>leader</option>, or <option>all</option> to select
|
||
whether to kill only the leader process of the machine or all
|
||
processes of the machine. If omitted, defaults to
|
||
<option>all</option>.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>-s</option></term>
|
||
<term><option>--signal=</option></term>
|
||
|
||
<listitem><para>When used with <command>kill</command>, choose
|
||
which signal to send to selected processes. Must be one of the
|
||
well-known signal specifiers, such as
|
||
<constant>SIGTERM</constant>, <constant>SIGINT</constant> or
|
||
<constant>SIGSTOP</constant>. If omitted, defaults to
|
||
<constant>SIGTERM</constant>.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--uid=</option></term>
|
||
|
||
<listitem><para>When used with the <command>shell</command>
|
||
command, chooses the user ID to open the interactive shell
|
||
session as. If this switch is not specified, defaults to
|
||
<literal>root</literal>. Note that this switch is not
|
||
supported for the <command>login</command> command (see
|
||
below).</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--setenv=</option></term>
|
||
|
||
<listitem><para>When used with the <command>shell</command>
|
||
command, sets an environment variable to pass to the executed
|
||
shell. Takes a pair of environment variable name and value,
|
||
separated by <literal>=</literal> as argument. This switch
|
||
may be used multiple times to set multiple environment
|
||
variables. Note that this switch is not supported for the
|
||
<command>login</command> command (see
|
||
below).</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--mkdir</option></term>
|
||
|
||
<listitem><para>When used with <command>bind</command>, creates
|
||
the destination directory before applying the bind
|
||
mount.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--read-only</option></term>
|
||
|
||
<listitem><para>When used with <command>bind</command>, applies
|
||
a read-only bind mount.</para></listitem>
|
||
</varlistentry>
|
||
|
||
|
||
<varlistentry>
|
||
<term><option>-n</option></term>
|
||
<term><option>--lines=</option></term>
|
||
|
||
<listitem><para>When used with <command>status</command>,
|
||
controls the number of journal lines to show, counting from
|
||
the most recent ones. Takes a positive integer argument.
|
||
Defaults to 10.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>-o</option></term>
|
||
<term><option>--output=</option></term>
|
||
|
||
<listitem><para>When used with <command>status</command>,
|
||
controls the formatting of the journal entries that are shown.
|
||
For the available choices, see
|
||
<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
|
||
Defaults to <literal>short</literal>.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--verify=</option></term>
|
||
|
||
<listitem><para>When downloading a container or VM image,
|
||
specify whether the image shall be verified before it is made
|
||
available. Takes one of <literal>no</literal>,
|
||
<literal>checksum</literal> and <literal>signature</literal>.
|
||
If <literal>no</literal>, no verification is done. If
|
||
<literal>checksum</literal> is specified, the download is
|
||
checked for integrity after transfer is complete, but no
|
||
signatures are verified. If <literal>signature</literal> is
|
||
specified, the checksum is verified and the images's signature
|
||
is checked against a local keyring of trustable vendors. It is
|
||
strongly recommended to set this option to
|
||
<literal>signature</literal> if the server and protocol
|
||
support this. Defaults to
|
||
<literal>signature</literal>.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--force</option></term>
|
||
|
||
<listitem><para>When downloading a container or VM image, and
|
||
a local copy by the specified local machine name already
|
||
exists, delete it first and replace it by the newly downloaded
|
||
image.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--dkr-index-url</option></term>
|
||
|
||
<listitem><para>Specifies the index server to use for
|
||
downloading <literal>dkr</literal> images with the
|
||
<command>pull-dkr</command>. Takes a
|
||
<literal>http://</literal>, <literal>https://</literal>
|
||
URL.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><option>--format=</option></term>
|
||
|
||
<listitem><para>When used with the <option>export-tar</option>
|
||
or <option>export-raw</option> commands, specifies the
|
||
compression format to use for the resulting file. Takes one of
|
||
<literal>uncompressed</literal>, <literal>xz</literal>,
|
||
<literal>gzip</literal>, <literal>bzip2</literal>. By default,
|
||
the format is determined automatically from the image file
|
||
name passed.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<xi:include href="user-system-options.xml" xpointer="host" />
|
||
<xi:include href="user-system-options.xml" xpointer="machine" />
|
||
|
||
<xi:include href="standard-options.xml" xpointer="no-pager" />
|
||
<xi:include href="standard-options.xml" xpointer="no-legend" />
|
||
<xi:include href="standard-options.xml" xpointer="help" />
|
||
<xi:include href="standard-options.xml" xpointer="version" />
|
||
</variablelist>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Commands</title>
|
||
|
||
<para>The following commands are understood:</para>
|
||
|
||
<refsect2><title>Machine Commands</title><variablelist>
|
||
|
||
<varlistentry>
|
||
<term><command>list</command></term>
|
||
|
||
<listitem><para>List currently running (online) virtual
|
||
machines and containers. To enumerate machine images that can
|
||
be started, use <command>list-images</command> (see
|
||
below). Note that this command hides the special
|
||
<literal>.host</literal> machine by default. Use the
|
||
<option>--all</option> switch to show it.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>status</command> <replaceable>NAME</replaceable>...</term>
|
||
|
||
<listitem><para>Show terse runtime status information about
|
||
one or more virtual machines and containers, followed by the
|
||
most recent log data from the journal. This function is
|
||
intended to generate human-readable output. If you are looking
|
||
for computer-parsable output, use <command>show</command>
|
||
instead. Note that the log data shown is reported by the
|
||
virtual machine or container manager, and frequently contains
|
||
console output of the machine, but not necessarily journal
|
||
contents of the machine itself.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>show</command> [<replaceable>NAME</replaceable>...]</term>
|
||
|
||
<listitem><para>Show properties of one or more registered
|
||
virtual machines or containers or the manager itself. If no
|
||
argument is specified, properties of the manager will be
|
||
shown. If an NAME is specified, properties of this virtual
|
||
machine or container are shown. By default, empty properties
|
||
are suppressed. Use <option>--all</option> to show those too.
|
||
To select specific properties to show, use
|
||
<option>--property=</option>. This command is intended to be
|
||
used whenever computer-parsable output is required. Use
|
||
<command>status</command> if you are looking for formatted
|
||
human-readable output.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>start</command> <replaceable>NAME</replaceable>...</term>
|
||
|
||
<listitem><para>Start a container as a system service, using
|
||
<citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
|
||
This starts <filename>systemd-nspawn@.service</filename>,
|
||
instantiated for the specified machine name, similar to the
|
||
effect of <command>systemctl start</command> on the service
|
||
name. <command>systemd-nspawn</command> looks for a container
|
||
image by the specified name in
|
||
<filename>/var/lib/machines/</filename> (and other search
|
||
paths, see below) and runs it. Use
|
||
<command>list-images</command> (see below) for listing
|
||
available container images to start.</para>
|
||
|
||
<para>Note that
|
||
<citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
||
also interfaces with a variety of other container and VM
|
||
managers, <command>systemd-nspawn</command> is just one
|
||
implementation of it. Most of the commands available in
|
||
<command>machinectl</command> may be used on containers or VMs
|
||
controlled by other managers, not just
|
||
<command>systemd-nspawn</command>. Starting VMs and container
|
||
images on those managers requires manager-specific
|
||
tools.</para>
|
||
|
||
<para>To interactively start a container on the command line
|
||
with full access to the container's console, please invoke
|
||
<command>systemd-nspawn</command> directly. To stop a running
|
||
container use <command>machinectl poweroff</command>, see
|
||
below.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>login</command> [<replaceable>NAME</replaceable>]</term>
|
||
|
||
<listitem><para>Open an interactive terminal login session in
|
||
a container or on the local host. If an argument is supplied,
|
||
it refers to the container machine to connect to. If none is
|
||
specified, or the container name is specified as the empty
|
||
string, or the special machine name <literal>.host</literal>
|
||
(see below) is specified, the connection is made to the local
|
||
host instead. This will create a TTY connection to a specific
|
||
container or the local host and asks for the execution of a
|
||
getty on it. Note that this is only supported for containers
|
||
running
|
||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
as init system.</para>
|
||
|
||
<para>This command will open a full login prompt on the
|
||
container or the local host, which then asks for username and
|
||
password. Use <command>shell</command> (see below) or
|
||
<citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
with the <option>--machine=</option> switch to directly invoke
|
||
a single command, either interactively or in the
|
||
background.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>shell</command> [[<replaceable>NAME</replaceable>@]<replaceable>NAME</replaceable> [<replaceable>PATH</replaceable> [<replaceable>ARGUMENTS</replaceable>...]]] </term>
|
||
|
||
<listitem><para>Open an interactive shell session in a
|
||
container or on the local host. The first argument refers to
|
||
the container machine to connect to. If none is specified, or
|
||
the machine name is specified as the empty string, or the
|
||
special machine name <literal>.host</literal> (see below) is
|
||
specified, the connection is made to the local host
|
||
instead. This works similar to <command>login</command> but
|
||
immediately invokes a user process. This command runs the
|
||
specified executable with the specified arguments, or
|
||
<filename>/bin/sh</filename> if none is specified. By default,
|
||
opens a <literal>root</literal> shell, but by using
|
||
<option>--uid=</option>, or by prefixing the machine name with
|
||
a username and an <literal>@</literal> character, a different
|
||
user may be selected. Use <option>--setenv=</option> to set
|
||
environment variables for the executed process.</para>
|
||
|
||
<para>When using the <command>shell</command> command without
|
||
arguments, (thus invoking the executed shell or command on the
|
||
local host), it is similar in many ways to a <citerefentry
|
||
project='die-net'><refentrytitle>su</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
session, but, unlike <command>su</command>, completely isolates
|
||
the new session from the originating session, so that it
|
||
shares no process or session properties, and is in a clean and
|
||
well-defined state. It will be tracked in a new utmp, login,
|
||
audit, security and keyring session, and will not inherit any
|
||
environment variables or resource limits, among other
|
||
properties.</para>
|
||
|
||
<para>Note that the
|
||
<citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
may be used in place of the <command>shell</command> command,
|
||
and allows more detailed, low-level configuration of the
|
||
invoked unit. However, it is frequently more privileged than
|
||
the <command>shell</command> command.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>enable</command> <replaceable>NAME</replaceable>...</term>
|
||
<term><command>disable</command> <replaceable>NAME</replaceable>...</term>
|
||
|
||
<listitem><para>Enable or disable a container as a system
|
||
service to start at system boot, using
|
||
<citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
|
||
This enables or disables
|
||
<filename>systemd-nspawn@.service</filename>, instantiated for
|
||
the specified machine name, similar to the effect of
|
||
<command>systemctl enable</command> or <command>systemctl
|
||
disable</command> on the service name.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>poweroff</command> <replaceable>NAME</replaceable>...</term>
|
||
|
||
<listitem><para>Power off one or more containers. This will
|
||
trigger a reboot by sending SIGRTMIN+4 to the container's init
|
||
process, which causes systemd-compatible init systems to shut
|
||
down cleanly. This operation does not work on containers that
|
||
do not run a
|
||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>-compatible
|
||
init system, such as sysvinit. Use
|
||
<command>terminate</command> (see below) to immediately
|
||
terminate a container or VM, without cleanly shutting it
|
||
down.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>reboot</command> <replaceable>NAME</replaceable>...</term>
|
||
|
||
<listitem><para>Reboot one or more containers. This will
|
||
trigger a reboot by sending SIGINT to the container's init
|
||
process, which is roughly equivalent to pressing Ctrl+Alt+Del
|
||
on a non-containerized system, and is compatible with
|
||
containers running any system manager.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>terminate</command> <replaceable>NAME</replaceable>...</term>
|
||
|
||
<listitem><para>Immediately terminates a virtual machine or
|
||
container, without cleanly shutting it down. This kills all
|
||
processes of the virtual machine or container and deallocates
|
||
all resources attached to that instance. Use
|
||
<command>poweroff</command> to issue a clean shutdown
|
||
request.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>kill</command> <replaceable>NAME</replaceable>...</term>
|
||
|
||
<listitem><para>Send a signal to one or more processes of the
|
||
virtual machine or container. This means processes as seen by
|
||
the host, not the processes inside the virtual machine or
|
||
container. Use <option>--kill-who=</option> to select which
|
||
process to kill. Use <option>--signal=</option> to select the
|
||
signal to send.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>bind</command> <replaceable>NAME</replaceable> <replaceable>PATH</replaceable> [<replaceable>PATH</replaceable>]</term>
|
||
|
||
<listitem><para>Bind mounts a directory from the host into the
|
||
specified container. The first directory argument is the
|
||
source directory on the host, the second directory argument
|
||
is the destination directory in the container. When the
|
||
latter is omitted, the destination path in the container is
|
||
the same as the source path on the host. When combined with
|
||
the <option>--read-only</option> switch, a ready-only bind
|
||
mount is created. When combined with the
|
||
<option>--mkdir</option> switch, the destination path is first
|
||
created before the mount is applied. Note that this option is
|
||
currently only supported for
|
||
<citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
containers.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>copy-to</command> <replaceable>NAME</replaceable> <replaceable>PATH</replaceable> [<replaceable>PATH</replaceable>]</term>
|
||
|
||
<listitem><para>Copies files or directories from the host
|
||
system into a running container. Takes a container name,
|
||
followed by the source path on the host and the destination
|
||
path in the container. If the destination path is omitted, the
|
||
same as the source path is used.</para></listitem>
|
||
</varlistentry>
|
||
|
||
|
||
<varlistentry>
|
||
<term><command>copy-from</command> <replaceable>NAME</replaceable> <replaceable>PATH</replaceable> [<replaceable>PATH</replaceable>]</term>
|
||
|
||
<listitem><para>Copies files or directories from a container
|
||
into the host system. Takes a container name, followed by the
|
||
source path in the container the destination path on the host.
|
||
If the destination path is omitted, the same as the source path
|
||
is used.</para></listitem>
|
||
</varlistentry>
|
||
</variablelist></refsect2>
|
||
|
||
<refsect2><title>Image Commands</title><variablelist>
|
||
|
||
<varlistentry>
|
||
<term><command>list-images</command></term>
|
||
|
||
<listitem><para>Show a list of locally installed container and
|
||
VM images. This enumerates all raw disk images and container
|
||
directories and subvolumes in
|
||
<filename>/var/lib/machines/</filename> (and other search
|
||
paths, see below). Use <command>start</command> (see above) to
|
||
run a container off one of the listed images. Note that, by
|
||
default, containers whose name begins with a dot
|
||
(<literal>.</literal>) are not shown. To show these too,
|
||
specify <option>--all</option>. Note that a special image
|
||
<literal>.host</literal> always implicitly exists and refers
|
||
to the image the host itself is booted from.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>image-status</command> [<replaceable>NAME</replaceable>...]</term>
|
||
|
||
<listitem><para>Show terse status information about one or
|
||
more container or VM images. This function is intended to
|
||
generate human-readable output. Use
|
||
<command>show-image</command> (see below) to generate
|
||
computer-parsable output instead.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>show-image</command> [<replaceable>NAME</replaceable>...]</term>
|
||
|
||
<listitem><para>Show properties of one or more registered
|
||
virtual machine or container images, or the manager itself. If
|
||
no argument is specified, properties of the manager will be
|
||
shown. If an NAME is specified, properties of this virtual
|
||
machine or container image are shown. By default, empty
|
||
properties are suppressed. Use <option>--all</option> to show
|
||
those too. To select specific properties to show, use
|
||
<option>--property=</option>. This command is intended to be
|
||
used whenever computer-parsable output is required. Use
|
||
<command>image-status</command> if you are looking for
|
||
formatted human-readable output.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>clone</command> <replaceable>NAME</replaceable> <replaceable>NAME</replaceable></term>
|
||
|
||
<listitem><para>Clones a container or VM image. The
|
||
arguments specify the name of the image to clone and the name
|
||
of the newly cloned image. Note that plain directory container
|
||
images are cloned into subvolume images with this command.
|
||
Note that cloning a container or VM image is optimized for
|
||
btrfs file systems, and might not be efficient on others, due
|
||
to file system limitations.</para>
|
||
|
||
<para>Note that this command leaves host name, machine ID and
|
||
all other settings that could identify the instance
|
||
unmodified. The original image and the cloned copy will hence
|
||
share these credentials, and it might be necessary to manually
|
||
change them in the copy.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>rename</command> <replaceable>NAME</replaceable> <replaceable>NAME</replaceable></term>
|
||
|
||
<listitem><para>Renames a container or VM image. The
|
||
arguments specify the name of the image to rename and the new
|
||
name of the image.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>read-only</command> <replaceable>NAME</replaceable> [<replaceable>BOOL</replaceable>]</term>
|
||
|
||
<listitem><para>Marks or (unmarks) a container or VM image
|
||
read-only. Takes a VM or container image name, followed by a
|
||
boolean as arguments. If the boolean is omitted, positive is
|
||
implied, i.e. the image is marked read-only.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>remove</command> <replaceable>NAME</replaceable>...</term>
|
||
|
||
<listitem><para>Removes one or more container or VM images.
|
||
The special image <literal>.host</literal>, which refers to
|
||
the host's own directory tree, may not be
|
||
removed.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>set-limit</command> [<replaceable>NAME</replaceable>] <replaceable>BYTES</replaceable></term>
|
||
|
||
<listitem><para>Sets the maximum size in bytes a specific
|
||
container or VM image, or all images, may grow up to on disk
|
||
(disk quota). Takes either one or two parameters. The first,
|
||
optional parameter refers to a container or VM image name. If
|
||
specified, the size limit of the specified image is changed. If
|
||
omitted, the overall size limit of the sum of all images stored
|
||
locally is changed. The final argument specifies the size
|
||
limit in bytes, possibly suffixed by the usual K, M, G, T
|
||
units. If the size limit shall be disabled, specify
|
||
<literal>-</literal> as size.</para>
|
||
|
||
<para>Note that per-container size limits are only supported
|
||
on btrfs file systems. Also note that, if
|
||
<command>set-limit</command> is invoked without image
|
||
parameter, and <filename>/var/lib/machines</filename> is
|
||
empty, and the directory is not located on btrfs, a btrfs
|
||
loopback file is implicitly created as
|
||
<filename>/var/lib/machines.raw</filename> with the given
|
||
size, and mounted to
|
||
<filename>/var/lib/machines</filename>. The size of the
|
||
loopback may later be readjusted with
|
||
<command>set-limit</command>, as well. If such a
|
||
loopback-mounted <filename>/var/lib/machines</filename>
|
||
directory is used, <command>set-limit</command> without image
|
||
name alters both the quota setting within the file system as
|
||
well as the loopback file and file system size
|
||
itself.</para></listitem>
|
||
</varlistentry>
|
||
|
||
</variablelist></refsect2>
|
||
|
||
<refsect2><title>Image Transfer Commands</title><variablelist>
|
||
|
||
<varlistentry>
|
||
<term><command>pull-tar</command> <replaceable>URL</replaceable> [<replaceable>NAME</replaceable>]</term>
|
||
|
||
<listitem><para>Downloads a <filename>.tar</filename>
|
||
container image from the specified URL, and makes it available
|
||
under the specified local machine name. The URL must be of
|
||
type <literal>http://</literal> or
|
||
<literal>https://</literal>, and must refer to a
|
||
<filename>.tar</filename>, <filename>.tar.gz</filename>,
|
||
<filename>.tar.xz</filename> or <filename>.tar.bz2</filename>
|
||
archive file. If the local machine name is omitted, it
|
||
is automatically derived from the last component of the URL,
|
||
with its suffix removed.</para>
|
||
|
||
<para>The image is verified before it is made available,
|
||
unless <option>--verify=no</option> is specified. Verification
|
||
is done via SHA256SUMS and SHA256SUMS.gpg files that need to
|
||
be made available on the same web server, under the same URL
|
||
as the <filename>.tar</filename> file, but with the last
|
||
component (the filename) of the URL replaced. With
|
||
<option>--verify=checksum</option>, only the SHA256 checksum
|
||
for the file is verified, based on the
|
||
<filename>SHA256SUMS</filename> file. With
|
||
<option>--verify=signature</option>, the SHA256SUMS file is
|
||
first verified with detached GPG signature file
|
||
<filename>SHA256SUMS.gpg</filename>. The public key for this
|
||
verification step needs to be available in
|
||
<filename>/usr/lib/systemd/import-pubring.gpg</filename> or
|
||
<filename>/etc/systemd/import-pubring.gpg</filename>.</para>
|
||
|
||
<para>The container image will be downloaded and stored in a
|
||
read-only subvolume in
|
||
<filename>/var/lib/machines/</filename> that is named after
|
||
the specified URL and its HTTP etag. A writable snapshot is
|
||
then taken from this subvolume, and named after the specified
|
||
local name. This behavior ensures that creating multiple
|
||
container instances of the same URL is efficient, as multiple
|
||
downloads are not necessary. In order to create only the
|
||
read-only image, and avoid creating its writable snapshot,
|
||
specify <literal>-</literal> as local machine name.</para>
|
||
|
||
<para>Note that the read-only subvolume is prefixed with
|
||
<filename>.tar-</filename>, and is thus not shown by
|
||
<command>list-images</command>, unless <option>--all</option>
|
||
is passed.</para>
|
||
|
||
<para>Note that pressing C-c during execution of this command
|
||
will not abort the download. Use
|
||
<command>cancel-transfer</command>, described
|
||
below.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>pull-raw</command> <replaceable>URL</replaceable> [<replaceable>NAME</replaceable>]</term>
|
||
|
||
<listitem><para>Downloads a <filename>.raw</filename>
|
||
container or VM disk image from the specified URL, and makes
|
||
it available under the specified local machine name. The URL
|
||
must be of type <literal>http://</literal> or
|
||
<literal>https://</literal>. The container image must either
|
||
be a <filename>.qcow2</filename> or raw disk image, optionally
|
||
compressed as <filename>.gz</filename>,
|
||
<filename>.xz</filename>, or <filename>.bz2</filename>. If the
|
||
local machine name is omitted, it is automatically
|
||
derived from the last component of the URL, with its suffix
|
||
removed.</para>
|
||
|
||
<para>Image verification is identical for raw and tar images
|
||
(see above).</para>
|
||
|
||
<para>If the downloaded image is in
|
||
<filename>.qcow2</filename> format it is converted into a raw
|
||
image file before it is made available.</para>
|
||
|
||
<para>Downloaded images of this type will be placed as
|
||
read-only <filename>.raw</filename> file in
|
||
<filename>/var/lib/machines/</filename>. A local, writable
|
||
(reflinked) copy is then made under the specified local
|
||
machine name. To omit creation of the local, writable copy
|
||
pass <literal>-</literal> as local machine name.</para>
|
||
|
||
<para>Similar to the behavior of <command>pull-tar</command>,
|
||
the read-only image is prefixed with
|
||
<filename>.raw-</filename>, and thus not shown by
|
||
<command>list-images</command>, unless <option>--all</option>
|
||
is passed.</para>
|
||
|
||
<para>Note that pressing C-c during execution of this command
|
||
will not abort the download. Use
|
||
<command>cancel-transfer</command>, described
|
||
below.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>pull-dkr</command> <replaceable>REMOTE</replaceable> [<replaceable>NAME</replaceable>]</term>
|
||
|
||
<listitem><para>Downloads a <literal>dkr</literal> container
|
||
image and makes it available locally. The remote name refers
|
||
to a <literal>dkr</literal> container name. If omitted, the
|
||
local machine name is derived from the <literal>dkr</literal>
|
||
container name.</para>
|
||
|
||
<para>Image verification is not available for
|
||
<literal>dkr</literal> containers, and thus
|
||
<option>--verify=no</option> must always be specified with
|
||
this command.</para>
|
||
|
||
<para>This command downloads all (missing) layers for the
|
||
specified container and places them in read-only subvolumes in
|
||
<filename>/var/lib/machines/</filename>. A writable snapshot
|
||
of the newest layer is then created under the specified local
|
||
machine name. To omit creation of this writable snapshot, pass
|
||
<literal>-</literal> as local machine name.</para>
|
||
|
||
<para>The read-only layer subvolumes are prefixed with
|
||
<filename>.dkr-</filename>, and thus not shown by
|
||
<command>list-images</command>, unless <option>--all</option>
|
||
is passed.</para>
|
||
|
||
<para>To specify the <literal>dkr</literal> index server to
|
||
use for looking up the specified container, use
|
||
<option>--dkr-index-url=</option>.</para>
|
||
|
||
<para>Note that pressing C-c during execution of this command
|
||
will not abort the download. Use
|
||
<command>cancel-transfer</command>, described
|
||
below.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>import-tar</command> <replaceable>FILE</replaceable> [<replaceable>NAME</replaceable>]</term>
|
||
<term><command>import-raw</command> <replaceable>FILE</replaceable> [<replaceable>NAME</replaceable>]</term>
|
||
<listitem><para>Imports a TAR or RAW container or VM image,
|
||
and places it under the specified name in
|
||
<filename>/var/lib/machines/</filename>. When
|
||
<command>import-tar</command> is used, the file specified as
|
||
first argument should be a tar archive, possibly compressed
|
||
with xz, gzip or bzip2. It will then be unpacked into its own
|
||
subvolume in <filename>/var/lib/machines</filename>. When
|
||
<command>import-raw</command> is used, the file should be a
|
||
qcow2 or raw disk image, possibly compressed with xz, gzip or
|
||
bzip2. If the second argument (the resulting image name) is
|
||
not specified, it is automatically derived from the file
|
||
name. If the file name is passed as <literal>-</literal>, the
|
||
image is read from standard input, in which case the second
|
||
argument is mandatory.</para>
|
||
|
||
<para>Similar as with <command>pull-tar</command>,
|
||
<command>pull-raw</command> the file system
|
||
<filename>/var/lib/machines.raw</filename> is increased in
|
||
size of necessary and appropriate. Optionally, the
|
||
<option>--read-only</option> switch may be used to create a
|
||
read-only container or VM image. No cryptographic validation
|
||
is done when importing the images.</para>
|
||
|
||
<para>Much like image downloads, ongoing imports may be listed
|
||
with <command>list-transfers</command> and aborted with
|
||
<command>cancel-transfer</command>.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>export-tar</command> <replaceable>NAME</replaceable> [<replaceable>FILE</replaceable>]</term>
|
||
<term><command>export-raw</command> <replaceable>NAME</replaceable> [<replaceable>FILE</replaceable>]</term>
|
||
<listitem><para>Exports a TAR or RAW container or VM image and
|
||
stores it in the specified file. The first parameter should be
|
||
a VM or container image name. The second parameter should be a
|
||
file path the TAR or RAW image is written to. If the path ends
|
||
in <literal>.gz</literal>, the file is compressed with gzip, if
|
||
it ends in <literal>.xz</literal>, with xz, and if it ends in
|
||
<literal>.bz2</literal>, with bzip2. If the path ends in
|
||
neither, the file is left uncompressed. If the second argument
|
||
is missing, the image is written to standard output. The
|
||
compression may also be explicitly selected with the
|
||
<option>--format=</option> switch. This is in particular
|
||
useful if the second parameter is left unspecified.</para>
|
||
|
||
<para>Much like image downloads and imports, ongoing exports
|
||
may be listed with <command>list-transfers</command> and
|
||
aborted with
|
||
<command>cancel-transfer</command>.</para>
|
||
|
||
<para>Note that, currently, only directory and subvolume images
|
||
may be exported as TAR images, and only raw disk images as RAW
|
||
images.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>list-transfers</command></term>
|
||
|
||
<listitem><para>Shows a list of container or VM image
|
||
downloads, imports and exports that are currently in
|
||
progress.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><command>cancel-transfers</command> <replaceable>ID</replaceable>...</term>
|
||
|
||
<listitem><para>Aborts a download, import or export of the
|
||
container or VM image with the specified ID. To list ongoing
|
||
transfers and their IDs, use
|
||
<command>list-transfers</command>. </para></listitem>
|
||
</varlistentry>
|
||
|
||
</variablelist></refsect2>
|
||
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Machine and Image Names</title>
|
||
|
||
<para>The <command>machinectl</command> tool operates on machines
|
||
and images whose names must be chosen following strict
|
||
rules. Machine names must be suitable for use as host names
|
||
following a conservative subset of DNS and UNIX/Linux
|
||
semantics. Specifically, they must consist of one or more
|
||
non-empty label strings, separated by dots. No leading or trailing
|
||
dots are allowed. No sequences of multiple dots are allowed. The
|
||
label strings may only consists of alphanumeric characters as well
|
||
as the dash and underscore. The maximum length of a machine name
|
||
is 64 characters.</para>
|
||
|
||
<para>A special machine with the name <literal>.host</literal>
|
||
refers to the running host system itself. This is useful for execution
|
||
operations or inspecting the host system as well. Not that
|
||
<command>machinectl list</command> will not show this special
|
||
machine unless the <option>--all</option> switch is specified.</para>
|
||
|
||
<para>Requirements on image names are less strict, however must be
|
||
valid UTF-8, must be suitable as file names (hence not be the
|
||
single or double dot, and not include a slash), and may not
|
||
contain control characters. Since many operations search for an
|
||
image by the name of a requested machine, it is recommended to name
|
||
images in the same strict fashion as machines.</para>
|
||
|
||
<para>A special image with the name <literal>.host</literal>
|
||
refers to the image of the running host system. It is hence
|
||
conceptually maps to the special <literal>.host</literal> machine
|
||
name described above. Note that <command>machinectl
|
||
list-images</command> won't show this special image either, unless
|
||
<option>--all</option> is specified.</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Files and Directories</title>
|
||
|
||
<para>Machine images are preferably stored in
|
||
<filename>/var/lib/machines/</filename>, but are also searched for
|
||
in <filename>/usr/local/lib/machines/</filename> and
|
||
<filename>/usr/lib/machines/</filename>. For compatibility reasons,
|
||
the directory <filename>/var/lib/container/</filename> is
|
||
searched, too. Note that images stored below
|
||
<filename>/usr</filename> are always considered read-only. It is
|
||
possible to symlink machines images from other directories into
|
||
<filename>/var/lib/machines/</filename> to make them available for
|
||
control with <command>machinectl</command>.</para>
|
||
|
||
<para>Note that many image operations are only supported,
|
||
efficient or atomic on btrfs file systems. Due to this, if the
|
||
<command>pull-tar</command>, <command>pull-raw</command>,
|
||
<command>pull-dkr</command>, <command>import-tar</command>,
|
||
<command>import-raw</command> and <command>set-limit</command>
|
||
commands notice that <filename>/var/lib/machines</filename> is
|
||
empty and not located on btrfs, they will implicitly set up a
|
||
loopback file <filename>/var/lib/machines.raw</filename>
|
||
containing a btrfs file system that is mounted to
|
||
<filename>/var/lib/machines</filename>. The size of this loopback
|
||
file may be controlled dynamically with
|
||
<command>set-limit</command>.</para>
|
||
|
||
<para>Disk images are understood by
|
||
<citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
and <command>machinectl</command> in three formats:</para>
|
||
|
||
<itemizedlist>
|
||
<listitem><para>A simple directory tree, containing the files
|
||
and directories of the container to boot.</para></listitem>
|
||
|
||
<listitem><para>A subvolume (on btrfs file systems), which are
|
||
similar to the simple directories, described above. However,
|
||
they have additional benefits, such as efficient cloning and
|
||
quota reporting.</para></listitem>
|
||
|
||
<listitem><para>"Raw" disk images, i.e. binary images of disks
|
||
with a GPT or MBR partition table. Images of this type are
|
||
regular files with the suffix
|
||
<literal>.raw</literal>.</para></listitem>
|
||
</itemizedlist>
|
||
|
||
<para>See
|
||
<citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
for more information on image formats, in particular it's
|
||
<option>--directory=</option> and <option>--image=</option>
|
||
options.</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Examples</title>
|
||
<example>
|
||
<title>Download an Ubuntu image and open a shell in it</title>
|
||
|
||
<programlisting># machinectl pull-tar https://cloud-images.ubuntu.com/trusty/current/trusty-server-cloudimg-amd64-root.tar.gz
|
||
# systemd-nspawn -M trusty-server-cloudimg-amd64-root</programlisting>
|
||
|
||
<para>This downloads and verifies the specified
|
||
<filename>.tar</filename> image, and then uses
|
||
<citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
to open a shell in it.</para>
|
||
</example>
|
||
|
||
<example>
|
||
<title>Download a Fedora image, set a root password in it, start
|
||
it as service</title>
|
||
|
||
<programlisting># machinectl pull-raw --verify=no http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/21/Cloud/Images/x86_64/Fedora-Cloud-Base-20141203-21.x86_64.raw.xz
|
||
# systemd-nspawn -M Fedora-Cloud-Base-20141203-21
|
||
# passwd
|
||
# exit
|
||
# machinectl start Fedora-Cloud-Base-20141203-21
|
||
# machinectl login Fedora-Cloud-Base-20141203-21</programlisting>
|
||
|
||
<para>This downloads the specified <filename>.raw</filename>
|
||
image with verification disabled. Then, a shell is opened in it
|
||
and a root password is set. Afterwards the shell is left, and
|
||
the machine started as system service. With the last command a
|
||
login prompt into the container is requested.</para>
|
||
</example>
|
||
|
||
<example>
|
||
<title>Download a Fedora <literal>dkr</literal> image</title>
|
||
|
||
<programlisting># machinectl pull-dkr --verify=no mattdm/fedora
|
||
# systemd-nspawn -M fedora</programlisting>
|
||
|
||
<para>Downloads a <literal>dkr</literal> image and opens a shell
|
||
in it. Note that the specified download command might require an
|
||
index server to be specified with the
|
||
<literal>--dkr-index-url=</literal>.</para>
|
||
</example>
|
||
|
||
<example>
|
||
<title>Exports a container image as tar file</title>
|
||
|
||
<programlisting># machinectl export-tar fedora myfedora.tar.xz</programlisting>
|
||
|
||
<para>Exports the container <literal>fedora</literal> in an
|
||
xz-compress tar file <filename>myfedora.tar.xz</filename> in the
|
||
current directory.</para>
|
||
</example>
|
||
|
||
<example>
|
||
<title>Create a new shell session</title>
|
||
|
||
<programlisting># machinectl shell --uid=lennart</programlisting>
|
||
|
||
<para>This creates a new shell session on the local host for
|
||
the user ID <literal>lennart</literal>, in a <citerefentry
|
||
project='die-net'><refentrytitle>su</refentrytitle><manvolnum>1</manvolnum></citerefentry>-like
|
||
fashion.</para>
|
||
</example>
|
||
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Exit status</title>
|
||
|
||
<para>On success, 0 is returned, a non-zero failure code
|
||
otherwise.</para>
|
||
</refsect1>
|
||
|
||
<xi:include href="less-variables.xml" />
|
||
|
||
<refsect1>
|
||
<title>See Also</title>
|
||
<para>
|
||
<citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
||
<citerefentry project='die-net'><refentrytitle>tar</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||
<citerefentry project='die-net'><refentrytitle>xz</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||
<citerefentry project='die-net'><refentrytitle>gzip</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||
<citerefentry project='die-net'><refentrytitle>bzip2</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
</para>
|
||
</refsect1>
|
||
|
||
</refentry>
|