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-------- Original Message --------
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject: </th>
<td>Re: [one-users] Shared File System HA</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Thu, 15 Mar 2012 23:00:27 +0000</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Nicolas Diogo <a class="moz-txt-link-rfc2396E" href="mailto:nicolasdiogo@gmx.com"><nicolasdiogo@gmx.com></a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td>Hans-Joachim Ehlers
<a class="moz-txt-link-rfc2396E" href="mailto:HansJoachim.Ehlers@eumetsat.int"><HansJoachim.Ehlers@eumetsat.int></a></td>
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Hi,<br>
<br>
apologies for hijacking the thread - is there a specific way to
configure this filesystem to work with OpenNebula?<br>
how should we go about to enable this?<br>
<br>
thanks,<br>
<br>
<br>
<br>
On 14/03/12 15:45, Hans-Joachim Ehlers wrote:
<blockquote
cite="mid:A3ADF8C56ADA0F45BC34F904A6514E280151A03968D5@EXW10.eum.root.eumetsat.int"
type="cite">
<pre wrap="">In case we are going to deploy OpenNebula we will use GPFS as our clustered FS ...
Since it does not answer your question: In case NFS is used you must make sure that:
• The NFS server exports the FS with the “sync” option. Otherwise data corruption could/will during server crash.
• The NFS client must at least use the mount option “hard“
Hth
Hajo
From: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:users-bounces@lists.opennebula.org">users-bounces@lists.opennebula.org</a> [<a moz-do-not-send="true" class="moz-txt-link-freetext" href="mailto:users-bounces@lists.opennebula.org">mailto:users-bounces@lists.opennebula.org</a>] On Behalf Of Marshall Grillos
Sent: Wednesday, March 14, 2012 4:27 PM
To: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:users@lists.opennebula.org">users@lists.opennebula.org</a>
Subject: [one-users] Shared File System HA
I am debating the differences between Shared and Non-shared file systems for an OpenNebula deployment.
One concern with the shared file system is High Availability. I am setting up the OpenNebula front-end with connectivity to a storage device. To avoid the event of a storage device failure (RAID controller, Power, etc) I am looking into setting up a secondary front-end server with attached storage. I would use NFS to share the storage to each VM Host and setup DRDB for block level replication between each cluster node. In the event of a storage failure, a failover would occur utilizing heartbeat/pacemaker to the secondary front-end server.
If anyone has tested a similar setup how do the VMs handle the minimal outage required for the failover to occur (the several seconds required to failover to the secondary front-end)? For a certain duration, wouldn’t the NFS mount be unavailable due to the failover mechanism?
Thanks,
Marshall
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</pre>
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