<!--
-lxc: linux Container library
-
-(C) Copyright IBM Corp. 2007, 2008
+(C) Copyright Canonical Ltd. 2014
Authors:
-Daniel Lezcano <daniel.lezcano at free.fr>
+Tycho Andersen <tycho.andersen@canonical.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
<refmeta>
<refentrytitle>lxc-checkpoint</refentrytitle>
<manvolnum>1</manvolnum>
- <refmiscinfo>IBM</refmiscinfo>
</refmeta>
<refnamediv>
<refname>lxc-checkpoint</refname>
<refpurpose>
- checkpoint a running container (not implemented yet)
+ checkpoint a container
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>lxc-checkpoint</command>
- <arg choice="req">--statefile=<replaceable>FILE</replaceable></arg>
- <arg choice="req">--statefd=<replaceable>FD</replaceable></arg>
- <arg choice="req">--name=<replaceable>NAME</replaceable></arg>
- <arg><option>-k</option>|<option>-p</option></arg>
+ <arg choice="req">-n <replaceable>name</replaceable></arg>
+ <arg choice="req">-D <replaceable>PATH</replaceable></arg>
+ <arg choice="opt">-r</arg>
+ <arg choice="opt">-s</arg>
+ <arg choice="opt">-v</arg>
+ <arg choice="opt">-d</arg>
+ <arg choice="opt">-F</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
-
<para>
- <command>lxc-checkpoint</command> is a command
- to checkpoint the specified container
- <replaceable>NAME</replaceable> and dumps its state into the file
- <replaceable>FILE</replaceable>. If the
- option <option>--kill</option> is specified, the application
- running in the container will terminate after the checkpoint
- just before resuming its execution. If the
- option <option>--pause</option> is specified, the application
- will be stopped after the checkpoint just before resuming
- execution. The command <command>lxc-unfreeze</command> will
- resume its execution.
+ <command>lxc-checkpoint</command> checkpoints and restores containers.
</para>
-
</refsect1>
<refsect1>
- <title>Checkpoint Options</title>
-
+ <title>Options</title>
<variablelist>
<varlistentry>
- <term><option>-S, --statefile=<replaceable>FILE</replaceable></option></term>
- <listitem>
- <para>
- write the state of the container in this
- <replaceable>FILE</replaceable>.
- This option is exclusive with <option>--statefd</option> below.
- </para>
- </listitem>
+ <term>
+ <option>-r, --restore</option>
+ </term>
+ <listitem>
+ <para>
+ Restore the checkpoint for the container, instead of dumping it.
+ This option is incompatible with <option>-s</option>.
+ </para>
+ </listitem>
</varlistentry>
<varlistentry>
- <term><option>-d, --statefd=<replaceable>FD</replaceable></option></term>
- <listitem>
- <para>
- write the state of the container in this
- <replaceable>FD</replaceable> file descriptor.
- This option is exclusive with above <option>--statefile</option>.
- </para>
- </listitem>
+ <term>
+ <option>-D <replaceable>PATH</replaceable>, --checkpoint-dir=<replaceable>PATH</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ The directory to dump the checkpoint metadata.
+ </para>
+ </listitem>
</varlistentry>
<varlistentry>
- <term><option>-k,--kill</option></term>
- <listitem>
- <para>
- Kill container processes after checkpoint. the processes are sent
- a <literal>SIGKILL</literal> signal.
- </para>
- <para>
- This option is mutually exclusive with the following
- <option>--pause</option> option.
- </para>
- </listitem>
+ <term>
+ <option>-s, --stop</option>
+ </term>
+ <listitem>
+ <para>
+ Optionally stop the container after dumping. This option is
+ incompatible with <option>-r</option>.
+ </para>
+ </listitem>
</varlistentry>
<varlistentry>
- <term><option>-p,--pause</option></term>
- <listitem>
- <para>
- Pause container processes after checkpoint. The container
- will be stopped until you resume it. This option is
- mutually exclusive with previously mentionned
- <option>--kill</option> option.
- </para>
- </listitem>
+ <term>
+ <option>-v, --verbose</option>
+ </term>
+ <listitem>
+ <para>
+ Enable verbose criu logging.
+ </para>
+ </listitem>
</varlistentry>
- </variablelist>
+ <varlistentry>
+ <term>
+ <option>-d, --daemon</option>
+ </term>
+ <listitem>
+ <para>
+ Restore the container in the background (this is the default).
+ Only available when providing <option>-r</option>.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>-F, --foreground</option>
+ </term>
+ <listitem>
+ <para>
+ Restore the container in the foreground. Only available when
+ providing <option>-r</option>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
</refsect1>
&commonoptions;
<refsect1>
<title>Examples</title>
- <para>
- To start a new container <literal>123</literal> computing decimals of pi
- </para>
- <programlisting>
- lxc-execute -n 123 -- pi1 -d 500000
- lxc-execute --name=123 -- pi1 -d 500000
- </programlisting>
-
- <para>
- to checkpoint the same container in <emphasis>dump-death</emphasis>
- mode
- </para>
- <programlisting>
- lxc-checkpoint -n 123 -S /share/123/chkpt1 -k
- lxc-checkpoint --name=123 -S /share/123/chkpt1 -k
- </programlisting>
+ <variablelist>
- <para>
- to checkpoint the same container and <emphasis>pause</emphasis> it
- </para>
- <programlisting>
- lxc-checkpoint -n 123 -S /share/123/chkpt1 -p
- lxc-checkpoint --name=123 -S /share/123/chkpt1 -p
- </programlisting>
+ <varlistentry>
+ <term>lxc-checkpoint -n foo -D /tmp/checkpoint</term>
+ <listitem>
+ <para>
+ Checkpoint the container foo into the directory /tmp/checkpoint.
+ </para>
+ </listitem>
+ </varlistentry>
- </refsect1>
+ <varlistentry>
+ <term>lxc-checkpoint -r -n foo -D /tmp/checkpoint</term>
+ <listitem>
+ <para>
+ Restore the checkpoint from the directory /tmp/checkpoint.
+ </para>
+ </listitem>
+ </varlistentry>
- <refsect1>
- <title>Notes</title>
- <para>Actually, this command does not operate. Its description
- helps to define a CLI api for future Checkpoint / Restart
- solution</para>
+ </variablelist>
</refsect1>
&seealso;
<refsect1>
<title>Author</title>
- <para>Daniel Lezcano <email>daniel.lezcano@free.fr</email></para>
+ <para>Tycho Andersen <email>tycho.andersen@canonical.com</email></para>
</refsect1>
-
</refentry>
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