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According to `[1]`, `lxc-attach` uses `-u,-g` instead of `--u,--g`. According to `[2]`, `lxc-execute` uses `-u,-g` instead of `--u,--g`. - [1] https://github.com/lxc/lxc/blob/stable-4.0/src/lxc/tools/lxc_attach.c#L131-L132 - [2] https://github.com/lxc/lxc/blob/stable-4.0/src/lxc/tools/lxc_execute.c#L59-L60 Signed-off-by: Edenis Freindorfer Azevedo <edenisfa@gmail.com>
235 lines
6.2 KiB
Plaintext
235 lines
6.2 KiB
Plaintext
<!--
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lxc: linux Container library
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(C) Copyright IBM Corp. 2007, 2008
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Authors:
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Daniel Lezcano <daniel.lezcano at free.fr>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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-->
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<!DOCTYPE refentry PUBLIC @docdtd@ [
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<!ENTITY commonoptions SYSTEM "@builddir@/common_options.sgml">
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<!ENTITY seealso SYSTEM "@builddir@/see_also.sgml">
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]>
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<refentry>
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<docinfo><date>@LXC_GENERATE_DATE@</date></docinfo>
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<refmeta>
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<refentrytitle>lxc-execute</refentrytitle>
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<manvolnum>1</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>lxc-execute</refname>
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<refpurpose>
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run an application inside a container.
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>lxc-execute</command>
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<arg choice="req">-n <replaceable>name</replaceable></arg>
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<arg choice="opt">-d</arg>
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<arg choice="opt">-f <replaceable>config_file</replaceable></arg>
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<arg choice="opt">-s KEY=VAL</arg>
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<arg choice="opt">-u, --uid <replaceable>uid</replaceable></arg>
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<arg choice="opt">-g, --gid <replaceable>gid</replaceable></arg>
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<arg choice="opt">-- <replaceable>command</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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<command>lxc-execute</command> runs the specified
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<replaceable>command</replaceable> inside the container
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specified by <replaceable>name</replaceable>.
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</para>
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<para>
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It will setup the container
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according to the configuration previously defined with the
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lxc-create command or with the configuration file parameter.
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If no configuration is
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defined, the default isolation is used.
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</para>
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<para>
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This command is mainly used when you want to quickly launch an
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application in an isolated environment.
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</para>
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<para>
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<command>lxc-execute</command> command will run the
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specified command into the container via an intermediate
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process, <command>lxc-init</command>.
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This lxc-init after launching the specified command,
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will wait for its end and all other reparented processes.
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(to support daemons in the container).
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In other words, in the
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container, <command>lxc-init</command> has the pid 1 and the
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first process of the application has the pid 2.
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</para>
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<para>
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The above <command>lxc-init</command> is designed to forward received
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signals to the started command.
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</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<variablelist>
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<varlistentry>
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<term>
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<option>-f, --rcfile <replaceable>config_file</replaceable></option>
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</term>
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<listitem>
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<para>
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Specify the configuration file to configure the virtualization
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and isolation functionalities for the container.
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</para>
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<para>
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This configuration file if present will be used even if there is
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already a configuration file present in the previously created
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container (via lxc-create).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-s, --define <replaceable>KEY=VAL</replaceable></option>
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</term>
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<listitem>
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<para>
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Assign value <replaceable>VAL</replaceable> to configuration
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variable <replaceable>KEY</replaceable>. This overrides any
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assignment done in <replaceable>config_file</replaceable>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-d, --daemon</option>
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</term>
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<listitem>
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<para>
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Run the container as a daemon. As the container has no
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more tty, if an error occurs nothing will be displayed,
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the log file can be used to check the error.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-u, --uid <replaceable>uid</replaceable></option>
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</term>
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<listitem>
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<para>
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Executes the <replaceable>command</replaceable> with user ID
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<replaceable>uid</replaceable> inside the container.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>--g, --gid <replaceable>gid</replaceable></option>
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</term>
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<listitem>
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<para>
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Executes the <replaceable>command</replaceable> with group ID
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<replaceable>gid</replaceable> inside the container.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--</option></term>
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<listitem>
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<para>
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Signal the end of options and disables further option
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processing. Any arguments after the -- are treated as
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arguments to <replaceable>command</replaceable>.
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</para>
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<para>
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This option is useful when you want specify options
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to <replaceable>command</replaceable> and don't want
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<command>lxc-execute</command> to interpret them.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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&commonoptions;
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<refsect1>
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<title>Diagnostic</title>
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<variablelist>
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<varlistentry>
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<term>The container is busy</term>
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<listitem>
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<para>
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The specified container is already running an
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application. You should stop it before reuse this
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container or create a new one.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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&seealso;
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<refsect1>
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<title>Author</title>
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<para>Daniel Lezcano <email>daniel.lezcano@free.fr</email></para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-shorttag:t
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End:
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-->
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