Revision e0897adf man/gnt-cluster.sgml

b/man/gnt-cluster.sgml
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  <!-- Fill in your name for FIRSTNAME and SURNAME. -->


  		





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  <!-- Please adjust the date whenever revising the manpage. -->


  		





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  <!ENTITY dhdate      "<date>February 12, 2009</date>">


  		





  
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  <!ENTITY dhdate      "<date>June 08, 2010</date>">


  		





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  <!-- SECTION should be 1-8, maybe w/ subsection other parameters are


  		





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       allowed: see man(7), man(1). -->


  		





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  <!ENTITY dhsection   "<manvolnum>8</manvolnum>">


  		





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    &dhucpackage;


  		





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    &dhsection;


  		





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    <refmiscinfo>ganeti 2.0</refmiscinfo>


  		





  
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    <refmiscinfo>Ganeti 2.2</refmiscinfo>


  		





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  </refmeta>


  		





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  <refnamediv>


  		





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    <refname>&dhpackage;</refname>


  		





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    <refpurpose>ganeti administration, cluster-wide</refpurpose>


  		





  
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    <refpurpose>Ganeti administration, cluster-wide</refpurpose>


  		





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  </refnamediv>


  		





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  <refsynopsisdiv>


  		





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    <cmdsynopsis>


  		





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    <para>


  		





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      The <command>&dhpackage;</command> is used for cluster-wide


  		





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      administration in the ganeti system.


  		





  
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      administration in the Ganeti system.


  		





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    </para>


  		





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  </refsect1>


  		





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      <para>


  		





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        The <option>-g</option> option will let you specify a volume group


  		





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        different than 'xenvg' for ganeti to use when creating instance disks.


  		





  
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        different than "xenvg" for Ganeti to use when creating instance disks.


  		





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        This volume group must have the same name on all nodes. Once the


  		





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        cluster is initialized this can be altered by using the


  		





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        <command>modify</command> command. If you don't want to use lvm


  		





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      <para>


  		





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        The <option>--no-voting</option> option skips the remote node agreement


  		





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        checks. This is dangerous, but necessary in some cases (for example


  		





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        failing over the master role in a 2 node cluster with the original master


  		





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        down). If the original master then comes up, it won't be able to start


  		





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        its master daemon because it won't have enough votes, but so won't the


  		





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        new master, if the master daemon ever needs a restart. You can pass


  		





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        --no-voting to ganeti-masterd on the new master to solve this problem,


  		





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        and gnt-cluster redist-conf to make sure the cluster is consistent again.


  		





  
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        failing over the master role in a 2 node cluster with the original


  		





  
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        master down). If the original master then comes up, it won't be able to


  		





  
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        start its master daemon because it won't have enough votes, but so


  		





  
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        won't the new master, if the master daemon ever needs a restart. You


  		





  
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        can pass <option>--no-voting</option> to


  		





  
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        <command>ganeti-masterd</command> on the new master to solve this


  		





  
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        problem, and run <command>gnt-cluster redist-conf</command> to make


  		





  
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        sure the cluster is consistent again.


  		





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      </para>


  		





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    </refsect2>


  		





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      </para>


  		





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      <para>


  		





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        If the <option>--no-nplus1-mem</option> option is given, ganeti won't


  		





  
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        If the <option>--no-nplus1-mem</option> option is given, Ganeti won't


  		





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        check whether if it loses a node it can restart all the instances on


  		





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        their secondaries (and report an error otherwise).


  		





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      </para>


  		












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