Hi Richard,<br><br><br>On Mon, May 23, 2011 at 4:09 PM, Richard Palmer <span dir="ltr"><<a href="mailto:richard.d.palmer@kcl.ac.uk">richard.d.palmer@kcl.ac.uk</a>></span> wrote:<br><blockquote style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;" class="gmail_quote">
The servers are all fairly powerful so I don't want to waste one just<br>
running the FE on it. Can I run the FE code in dom0 (in Xen) and<br>
also add the same server as a host to Nebula?. Or would it be better<br>
to create a domU just to run the FE code in, but still add the host<br>
to Nebula ?.<br></blockquote><br>The FE can be added as a Host just fine.<br>We would advise to install OpenNebula in dom0, since there's no clear advantage to an installation inside a VM. It will save you some network configuration, and you avoid a possible performance downgrade.<br>
<br><br>You may however have some good reasons to install OpeNebula in a domU.<br>For instance, your servers may have an old OS and you find it difficult to install the required dependencies. In that case a virtualized recent distribution will be easier to set-up. Or if you have big plans for your domU OpenNebula like migration to new HW, or High Availability setups.<br>
<br>In that case, keep in mind that the VM must be able to see the other Hosts in your network, attaching its interfaces to a bridge in the private physical interface. You should also configure an external NFS server.<br>
<br><blockquote style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;" class="gmail_quote"> Can (or should) long running servers be managed through Nebula ? E.g.<br>
a blog server. I'd like to have a single view of all the servers<br>
so creating them all via Nebula would be useful, but perhaps it's<br>
not really meant for this.<br></blockquote><br>Yes, OpenNebula can and should manage all VMs, because it assumes exclusive usage of the physical resources, and managing VMs
manually may lead to IP collisions.<br><br>Moreover, OpenNebula is well suited for long running servers. You can take advantage of the Fault Tolerance features [1] to resubmit a crashed VM, or even resubmit the VM in another Host if the first one fails. And, if the server running OpenNebula fails, it will continue the monitoring and management of the VMs when it is restarted.<br>
<br><br><blockquote style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;" class="gmail_quote"> Can any requirements beyond memory and disc be specified for an<br>
instance ?. E.g. must have access to tape library attached to only<br>
one of the hosts.<br></blockquote>
<br>You can define any placement requirement. If you need a specific Host,<br>REQUIREMENTS = "NAME = myhost"<br><br>or you can group some Hosts in clusters [3], and require the VM to be deployed in any of them:<br>
REQUIREMENTS = "CLUSTER = development"<br><br><br>Best regards,<br>Carlos.<br><br>[1] <a href="http://opennebula.org/documentation:rel2.2:ftguide">http://opennebula.org/documentation:rel2.2:ftguide</a><br>[2] <a href="http://opennebula.org/documentation:rel2.2:template#placement_section">http://opennebula.org/documentation:rel2.2:template#placement_section</a><br>
[3] <a href="http://opennebula.org/documentation:rel2.2:cluster_guide">http://opennebula.org/documentation:rel2.2:cluster_guide</a><br clear="all"><span style="border-collapse:collapse;color:rgb(136, 136, 136);font-family:arial, sans-serif;font-size:13px">--<br>
Carlos Martín, MSc<br>Project Major Contributor<br><span style="background-color:rgb(255, 255, 204);color:rgb(34, 34, 34);background-repeat:initial initial">OpenNebula</span> - The Open Source Toolkit for Cloud Computing<br>
<a href="http://www.opennebula.org/" style="color:rgb(42, 93, 176)" target="_blank">www.<span style="background-color:rgb(255, 255, 204);color:rgb(34, 34, 34);background-repeat:initial initial">OpenNebula</span>.org</a> | <a href="mailto:cmartin@opennebula.org" style="color:rgb(42, 93, 176)" target="_blank">cmartin@<span style="background-color:rgb(255, 255, 204);color:rgb(34, 34, 34);background-repeat:initial initial">opennebula</span>.org</a></span><br>
<br><br><div class="gmail_quote">On Mon, May 23, 2011 at 4:09 PM, Richard Palmer <span dir="ltr"><<a href="mailto:richard.d.palmer@kcl.ac.uk">richard.d.palmer@kcl.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Dear list,<br>
<br>
I'm planning on a open nebula setup on some hardware we have<br>
(not necessarily the hardware we *need*, but I'm hoping nebula will<br>
let us make the best use of it). But I have some questions:<br>
<br>
The servers are all fairly powerful so I don't want to waste one just<br>
running the FE on it. Can I run the FE code in dom0 (in Xen) and<br>
also add the same server as a host to Nebula?. Or would it be better<br>
to create a domU just to run the FE code in, but still add the host<br>
to Nebula ?.<br>
<br>
Can (or should) long running servers be managed through Nebula ? E.g.<br>
a blog server. I'd like to have a single view of all the servers<br>
so creating them all via Nebula would be useful, but perhaps it's<br>
not really meant for this.<br>
<br>
Can any requirements beyond memory and disc be specified for an<br>
instance ?. E.g. must have access to tape library attached to only<br>
one of the hosts.<br>
<br>
Many thanks,<br>
<br>
Richard<br>
<br>
--<br>
<font color="#888888">Richard Palmer | Centre for E-Research<br>
| King's College London<br>
<a href="mailto:richard.d.palmer@kcl.ac.uk">richard.d.palmer@kcl.ac.uk</a> |<br>
Tel: <a href="tel:0207%20848%201973" value="+12078481973">0207 848 1973</a> |<br>
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