<br><font size=2 face="sans-serif">IIRC three active nodes are not supported
by DRBD.</font>
<br><font size=2 face="sans-serif">You will have to resort to a shared
storage solution. I am not entirely sure if a NFS-Server managed by Pacemaker
with a backing DRBD would be fast enough and how well KVM handles the outage
in case of a failover of the Cluster.</font>
<br><font size=2 face="sans-serif">In this Environment you would have two
dedicated servers for the storage-cluster and combine them with a bunch
of "pizzaboxes" that run the Virtual Machines in another pacemaker
cluster. As a decent storage backend (bunch of 15k SAS-drives, Raid-controller+BBU)
easily costs much more than those small servers you might even get away
with about the same cost - depending on the number of disks you had planned
for your cluster.<br>
</font><font size=3 color=#5f5f5f>Mit freundlichen Grüßen / Best Regards<br>
<br>
Robert Köppl<br>
<br>
Customer Support & Projects <br>
Teamleader IT Support<br>
<b><br>
KNAPP Systemintegration GmbH</b><br>
Waltenbachstraße 9<br>
8700 Leoben, Austria <br>
Phone: +43 3842 805-322<br>
Fax: +43 3842 82930-500<br>
robert.koeppl@knapp.com <br>
www.KNAPP.com <br>
<br>
Commercial register number: FN 138870x<br>
Commercial register court: Leoben</font><font size=3><br>
</font><font size=3 color=#d2d2d2><br>
The information in this e-mail (including any attachment) is confidential
and intended to be for the use of the addressee(s) only. If you have received
the e-mail by mistake, any disclosure, copy, distribution or use of the
contents of the e-mail is prohibited, and you must delete the e-mail from
your system. As e-mail can be changed electronically KNAPP assumes no responsibility
for any alteration to this e-mail or its attachments. KNAPP has taken every
reasonable precaution to ensure that any attachment to this e-mail has
been swept for virus. However, KNAPP does not accept any liability for
damage sustained as a result of such attachment being virus infected and
strongly recommend that you carry out your own virus check before opening
any attachment.</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>Björn Enroth <bjorn@comnia.com></b>
</font>
<br><font size=1 face="sans-serif">Gesendet von: drbd-user-bounces@lists.linbit.com</font>
<p><font size=1 face="sans-serif">16.04.2012 09:09</font>
<td width=59%>
<table width=100%>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">An</font></div>
<td><font size=1 face="sans-serif">drbd-user@lists.linbit.com</font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Kopie</font></div>
<td>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Thema</font></div>
<td><font size=1 face="sans-serif">[DRBD-user] Three node cluster?</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br>
<table>
<tr>
<td colspan=3 bgcolor=white><font size=3>Guys, <br>
I am looking for information of how to deal with a KVM three node cluster
with DRBD <br>
<br>
I have a "baby machine" ubuntu 11.10 pacemaker/drbd cluster with
two nodes, local disks with drbd setup in between. This is working flawless. <br>
<br>
My challenge now is that I want to add a third node with the same setup.
How do I handle drbd in this setup? I'd like to have all nodes active,
to be able to migrate resources, mainly kvm virtual guests, around the
cluster as I see fit. I'd also like pacemaker to be able to dynamically
handle the load. <br>
<br>
I've been surfing' around for a while... Either I am not able to find the
right information, or it is so obvious how to handle this so I am missing
the point somewhere. Or, in worst case, this is not possible and I need
to enter another route to make this work as I want. <br>
<br>
Any ideas? <br>
<br>
Thanks a lot in advance for your patience with me </font>
<br>
<br>
<table align=center>
<tr>
<td></table>
<br></table>
<br><font size=3><br>
<br>
-------------------<br>
Björn Enroth<br>
Comnia Internet AB<br>
</font><tt><font size=2>_______________________________________________<br>
drbd-user mailing list<br>
drbd-user@lists.linbit.com<br>
http://lists.linbit.com/mailman/listinfo/drbd-user<br>
</font></tt>
<br>