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<!doctype refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [

  <!-- Please adjust the date whenever revising the manpage. -->
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  <!ENTITY dhdate      "<date>February 11, 2009</date>">
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  <!-- SECTION should be 1-8, maybe w/ subsection other parameters are
       allowed: see man(7), man(1). -->
  <!ENTITY dhsection   "<manvolnum>8</manvolnum>">
  <!ENTITY dhucpackage "<refentrytitle>ganeti-noded</refentrytitle>">
  <!ENTITY dhpackage   "ganeti-noded">

  <!ENTITY debian      "<productname>Debian</productname>">
  <!ENTITY gnu         "<acronym>GNU</acronym>">
  <!ENTITY gpl         "&gnu; <acronym>GPL</acronym>">
  <!ENTITY footer SYSTEM "footer.sgml">
]>

<refentry>
  <refentryinfo>
    <copyright>
      <year>2006</year>
      <year>2007</year>
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      <year>2008</year>
      <year>2009</year>
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      <holder>Google Inc.</holder>
    </copyright>
    &dhdate;
  </refentryinfo>
  <refmeta>
    &dhucpackage;

    &dhsection;
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    <refmiscinfo>ganeti 2.0</refmiscinfo>
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  </refmeta>
  <refnamediv>
    <refname>&dhpackage;</refname>

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    <refpurpose>ganeti node daemon</refpurpose>
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  </refnamediv>
  <refsynopsisdiv>
    <cmdsynopsis>
      <command>&dhpackage; </command>
      <arg>-f</arg>
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      <arg>-d</arg>
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    </cmdsynopsis>
  </refsynopsisdiv>
  <refsect1>
    <title>DESCRIPTION</title>

    <para>
      The <command>&dhpackage;</command> is the daemon which is
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      responsible for the node functions in the ganeti system.
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    </para>

    <para>
      For testing purposes, you can give the <option>-f</option>
      option and the program won't detach from the running terminal.
    </para>
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    <para>
      Debug-level message can be activated by giving the
      <option>-d</option> option.
    </para>
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    <para>
      Logging to syslog, rather than its own log file, can be enabled by
      passing in the <option>--syslog</option> option.
    </para>

    <para>
      The ganeti-noded daemon listens to port 1811 TCP, on all interfaces, by
      default. This can be overridden by an entry in /etc/services or by
      passing the <option>-p</option> option. The <option>-b</option> option
      can be used to specify the address to bind to (defaults to 0.0.0.0).
    </para>

    <para>
      Ganeti noded communication is protected via SSL, with a key generated at
      cluster init time. This can be disabled with the
      <option>--no-ssl</option> option, or a different ssl key and certificate
      can be specified using the <option>-K</option> and <option>-C</option>
      options.
    </para>

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    <refsect2>
      <title>ROLE</title>
      <para>
        The role of the node daemon is to do almost all the actions
        that change the state of the node. Things like creating disks
        for instances, activating disks, starting/stopping instance
        and so on are done via the node daemon.
      </para>

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      <para>
        Also, in some cases the startup/shutdown of the master daemon
        are done via the node daemon, and the cluster IP address is
        also added/removed to the master node via it.
      </para>

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      <para>
        If the node daemon is stopped, the instances are not affected,
        but the master won't be able to talk to that node.
      </para>
    </refsect2>

    <refsect2>
      <title>COMMUNICATION PROTOCOL</title>
      <para>
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        Currently the master-node RPC is done using a simple json-RPC
        over HTTP(S).
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      </para>
    </refsect2>

  </refsect1>

  &footer;

</refentry>

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