Synnefo » snf-ganeti » ganeti-local

        Supported DRBD versions: the <literal>0.7</literal> series

        <emphasis role="strong">or</emphasis>

        <literal>8.0.x</literal>. It's recommended to have at least

        version <literal>0.7.24</literal> if you use

        <command>udev</command> since older versions have a bug

        related to device discovery which can be triggered in cases of

        hard drive failure.

        passes the following option to the module (for

        <literal>0.7.x</literal>:

        allow you to use up to 32 instances per node) or for

        <literal>8.0.x</literal> you can use up to

        <constant>255</constant>

        (i.e. <computeroutput>minor_count=255</computeroutput>, but

        for most clusters <constant>128</constant> should be enough).

      <para>or for using DRBD <literal>8.x</literal> from the etch

      backports:</para>

      <screen>

apt-get install -t etch-backports drbd8-module-source drbd8-utils

m-a update

m-a a-i drbd8

echo drbd minor_count=128 >> /etc/modules

modprobe drbd minor_count=128

      </screen>

        (<computeroutput>remote_raid1</computeroutput> for drbd 0.7

        and <computeroutput>drbd</computeroutput> for drbd 8.x).  All

        commands need to be executed on the Ganeti master node (the

        one on which <computeroutput>gnt-cluster init</computeroutput>

        was run).  Verify that the OS scripts are present on all

        cluster nodes with <computeroutput>gnt-os

        list</computeroutput>.

        to <literal>remote_raid1</literal> (drbd 0.7) or

        <literal>drbd</literal> (drbd 8.0) and specify the node on

        in <literal>remote_raid1</literal> or <literal>drbd</literal>

        disk templates), use <computeroutput>gnt-instance failover