Hi,<br><br>1) The documentation page about fault taulerance is quite explicative about the point.<br><br><a href="http://opennebula.org/documentation:rel3.4:ftguide">http://opennebula.org/documentation:rel3.4:ftguide</a><br>
<br>You can use the internal one hook system to deal with different kind of failure.<br><br>Also there is a plugin on the dev communit site to deal with UNKWON states<br><br><a href="http://dev.opennebula.org/issues/1144#change-2930">http://dev.opennebula.org/issues/1144#change-2930</a><br>
<br>Note that i never tested either of them. I always been scared of this kind of solutions ... Too many different variables in "my kind" of failures to let a script deal with it. Guess it really depends on what run on your VM.<br>
<br>2) This can be easily achieved with an external monitoring and restart handler for the "oned" part of the management node ... nagios would do that. <br>Mysql redundancy is your choise ... multimaster replication or mysql cluster, wich is also documented on the web <br>
<br>site <a href="https://support.opennebula.pro/entries/20400286-opennebula-with-mysql-cluster-for-high-availability">https://support.opennebula.pro/entries/20400286-opennebula-with-mysql-cluster-for-high-availability</a><br>
<br>The beauty of opennebula , and the reason why i choosed it over the others, is the simplicity of its components that makes indeed so easy to manage and adapt.<br><br>cheers<br>fc<br><br><div class="gmail_quote">On Thu, May 17, 2012 at 10:02 AM, Yount, William D <span dir="ltr"><<a href="mailto:Yount.William@menloworldwide.com" target="_blank">Yount.William@menloworldwide.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal">We have been working on implementing a cloud at work. What we want is basically a fault tolerant hypervisor cluster. I tried CloudStack, however it offered only HA but not fault tolerance. If a node goes out, then a human has to migrate the VM over to a new node.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p><u></u><span>1)<span style="font:7.0pt "Times New Roman""> </span></span><u></u>One feature that has caught my eye with OpenNebula is that it claims to offer fault tolerance. When I hear fault tolerance, I envision that if the node a VM is running on goes out, that the management software will migrate the VM over to another node and start it back up. Without this feature, a simple hypervisor cluster meets our need.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p><u></u><span>2)<span style="font:7.0pt "Times New Roman""> </span></span><u></u>Does OpenNebula provide for automatic failover of the management server? In CloudStack, there was no built in replication of the management server. If your management server went down you had to start up another one. I had to create two management servers and then use MySQL replication, KeepAlived and some other tools to get automatic failover. <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I am just looking for as much redundancy as I can get. With the management/storage/node model, I would like to have as much redundancy as possible. <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="color:#1f497d">Thanks,<u></u><u></u></span></p><p class="MsoNormal">
<b><span style="font-size:8.0pt;font-family:"Segoe UI Light","sans-serif";color:#1f497d">William Yount </span></b><span style="font-size:8.0pt;font-family:"Segoe UI Light","sans-serif";color:#1f497d"><u></u><u></u></span></p>
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