mirror_lxc/doc/ja/lxc-unshare.sgml.in

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lxc: linux Container library

(C) Copyright IBM Corp. 2007, 2008

Authors:
Daniel Lezcano <daniel.lezcano at free.fr>
Serge Hallyn <serge.hallyn at ubuntu.com>

This library is free software; you can redistribute it and/or
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Translated into Japanese
by KATOH Yasufumi <karma at jazz.email.ne.jp>

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<!ENTITY seealso SYSTEM "@builddir@/see_also.sgml">
]>

<refentry>

  <docinfo><date>@LXC_GENERATE_DATE@</date></docinfo>

  <refmeta>
    <refentrytitle>lxc-unshare</refentrytitle>
    <manvolnum>1</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>lxc-unshare</refname>

    <refpurpose>
      <!--
      Run a task in a new set of namespaces.
      -->
      タスクの新しい名前空間の組の中ので実行
    </refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>lxc-unshare</command>
      <arg choice="req">-s <replaceable>namespaces</replaceable></arg>
      <arg choice="req">-u <replaceable>user</replaceable></arg>
      <arg choice="req">command</arg>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title><!-- Description -->説明</title>

    <para>
      <!--
      <command>lxc-unshare</command> can be used to run a task in a cloned set
      of namespaces.  This command is mainly provided for testing purposes.
      Despite its name, it always uses clone rather than unshare to create
      the new task with fresh namespaces.  Apart from testing kernel
      regressions this should make no difference.
      -->
      <command>lxc-unshare</command> はクローンされた名前空間の組の中でタスクを実行するのに使います．
      このコマンドは主にテスト目的で使います．
      このような名前であるにもかかわらず，このコマンドは常に，新しい名前空間で新しいタスクを作成するために unshare ではなく clone を使います．
      テスト中のカーネルの退行は別として，これで違いは生じないはずです．
    </para>

  </refsect1>

  <refsect1>

    <title><!-- Options -->オプション</title>

    <variablelist>

      <varlistentry>
	<term>
	  <option>-s <replaceable>namespaces</replaceable></option>
	</term>
	<listitem>
	  <para>
            <!--
	    Specify the namespaces to attach to, as a pipe-separated list,
	    e.g. <replaceable>NETWORK|IPC</replaceable>. Allowed values are
	    <replaceable>MOUNT</replaceable>, <replaceable>PID</replaceable>,
	    <replaceable>UTSNAME</replaceable>, <replaceable>IPC</replaceable>,
	    <replaceable>USER </replaceable> and
	    <replaceable>NETWORK</replaceable>. This allows one to change
	    the context of the process to e.g. the network namespace of the
	    container while retaining the other namespaces as those of the
	    host.
            -->
            アタッチする名前空間を，パイプでつなげたリストで指定します．
            例えば <replaceable>NETWORK|IPC</replaceable> のようにです．
            指定できる値は <replaceable>MOUNT</replaceable>，<replaceable>PID</replaceable>，<replaceable>UTSNAME</replaceable>，<replaceable>IPC</replaceable>，<replaceable>USER </replaceable>，<replaceable>NETWORK</replaceable> です．
            これにより，プロセスのコンテキストを変更することができます．
            例えば，コンテナのネットワーク名前空間だけを変更し，他の名前空間をホストのものと同じものに保ったままにするというようなことです．
	  </para>
	</listitem>
      </varlistentry>

      <varlistentry>
	<term>
	  <option>-u <replaceable>user</replaceable></option>
	</term>
	<listitem>
	  <para>
            <!--
	    Specify a user which the new task should become.  This option is
	    only valid if a user namespace is unshared.
            -->
            新しいタスクを実行するユーザを指定します．
            このオプションはユーザ名前空間を unshare する時のみ有効です．
	  </para>
	</listitem>
      </varlistentry>

    </variablelist>

  </refsect1>

  <refsect1>
    <title><!-- Examples -->例</title>
      <para>
        <!--
        To spawn a new shell with its own UTS (hostname) namespace,
        <programlisting>
          lxc-unshare -s UTSNAME /bin/bash
        </programlisting>
	If the hostname is changed in that shell, the change will not be
	reflected on the host.
        -->
        自身の UTS(hostname)名前空間でシェルを起動するには以下のように実行します．
        <programlisting>
          lxc-unshare -s UTSNAME /bin/bash
        </programlisting>
        もし，そのシェル上でホスト名を変更しても，その変更はホストには反映されません．
      </para>
      <para>
        <!--
        To spawn a shell in a new network, pid, and mount namespace,
        <programlisting>
          lxc-unshare -s "NETWORK|PID|MOUNT" /bin/bash
        </programlisting>
	The resulting shell will have pid 1 and will see no network interfaces.
	After re-mounting /proc in that shell,
        <programlisting>
          mount -t proc proc /proc
        </programlisting>
	ps output will show there are no other processes in the namespace.
        -->
        新しいネットワーク，pid，マウント名前空間でシェルを起動するには以下のように実行します．
        <programlisting>
          lxc-unshare -s "NETWORK|PID|MOUNT" /bin/bash
        </programlisting>
        その結果起動するシェルは pid が 1 となり，ネットワークインターフェースがないでしょう．
        そのシェル上で /proc を再マウントした後
        <programlisting>
          mount -t proc proc /proc
        </programlisting>
        ps の出力は，その名前空間内には他のプロセスが存在しない事を表示するでしょう．
      </para>
  </refsect1>

  &seealso;

  <refsect1>
    <title><!-- Author -->作者</title>
    <para>Daniel Lezcano <email>daniel.lezcano@free.fr</email></para>
  </refsect1>

</refentry>

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