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<!--
lxc: linux Container library
(C) Copyright IBM Corp. 2007, 2008
Authors:
Daniel Lezcano <daniel.lezcano at free.fr>
This library 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.
This library 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 this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-->
<!DOCTYPE refentry PUBLIC @docdtd@ [
<!ENTITY commonoptions SYSTEM "@builddir@/common_options.sgml">
<!ENTITY seealso SYSTEM "@builddir@/see_also.sgml">
]>
<refentry>
<docinfo><date>@LXC_GENERATE_DATE@</date></docinfo>
<refmeta>
<refentrytitle>lxc-execute</refentrytitle>
<manvolnum>1</manvolnum>
</refmeta>
<refnamediv>
<refname>lxc-execute</refname>
<refpurpose>
run an application inside a container.
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>lxc-execute</command>
<arg choice="req">-n <replaceable>name</replaceable></arg>
<arg choice="opt">-d</arg>
<arg choice="opt">-f <replaceable>config_file</replaceable></arg>
<arg choice="opt">-s KEY=VAL</arg>
<arg choice="opt">-u, --uid <replaceable>uid</replaceable></arg>
<arg choice="opt">-g, --gid <replaceable>gid</replaceable></arg>
<arg choice="opt">-- <replaceable>command</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>lxc-execute</command> runs the specified
<replaceable>command</replaceable> inside the container
specified by <replaceable>name</replaceable>.
</para>
<para>
It will setup the container
according to the configuration previously defined with the
lxc-create command or with the configuration file parameter.
If no configuration is
defined, the default isolation is used.
</para>
<para>
This command is mainly used when you want to quickly launch an
application in an isolated environment.
</para>
<para>
<command>lxc-execute</command> command will run the
specified command into the container via an intermediate
process, <command>lxc-init</command>.
This lxc-init after launching the specified command,
will wait for its end and all other reparented processes.
(to support daemons in the container).
In other words, in the
container, <command>lxc-init</command> has the pid 1 and the
first process of the application has the pid 2.
</para>
<para>
The above <command>lxc-init</command> is designed to forward received
signals to the started command.
</para>
</refsect1>
<refsect1>
<title>Options</title>
<variablelist>
<varlistentry>
<term>
<option>-f, --rcfile <replaceable>config_file</replaceable></option>
</term>
<listitem>
<para>
Specify the configuration file to configure the virtualization
and isolation functionalities for the container.
</para>
<para>
This configuration file if present will be used even if there is
already a configuration file present in the previously created
container (via lxc-create).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-s, --define <replaceable>KEY=VAL</replaceable></option>
</term>
<listitem>
<para>
Assign value <replaceable>VAL</replaceable> to configuration
variable <replaceable>KEY</replaceable>. This overrides any
assignment done in <replaceable>config_file</replaceable>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-d, --daemon</option>
</term>
<listitem>
<para>
Run the container as a daemon. As the container has no
more tty, if an error occurs nothing will be displayed,
the log file can be used to check the error.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-u, --uid <replaceable>uid</replaceable></option>
</term>
<listitem>
<para>
Executes the <replaceable>command</replaceable> with user ID
<replaceable>uid</replaceable> inside the container.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>--g, --gid <replaceable>gid</replaceable></option>
</term>
<listitem>
<para>
Executes the <replaceable>command</replaceable> with group ID
<replaceable>gid</replaceable> inside the container.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--</option></term>
<listitem>
<para>
Signal the end of options and disables further option
processing. Any arguments after the -- are treated as
arguments to <replaceable>command</replaceable>.
</para>
<para>
This option is useful when you want specify options
to <replaceable>command</replaceable> and don't want
<command>lxc-execute</command> to interpret them.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
&commonoptions;
<refsect1>
<title>Diagnostic</title>
<variablelist>
<varlistentry>
<term>The container is busy</term>
<listitem>
<para>
The specified container is already running an
application. You should stop it before reuse this
container or create a new one.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
&seealso;
<refsect1>
<title>Author</title>
<para>Daniel Lezcano <email>daniel.lezcano@free.fr</email></para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
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End:
-->
|
