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HI,<br>
<br>
Thanks for that reply Carlos, that is an interesting solution, and I
hadn't fully considered how a one-box OpenNebula system might be
useful in Diego's case.<br>
<br>
Presumably then, if this were to be extended to a two-host cluster,
the front-end component could be run on either node and migrate from
one to the other with e.g. pacemaker.<br>
<br>
I've read this post with interest:
<a class="moz-txt-link-freetext" href="http://blog.opennebula.org/?p=1523">http://blog.opennebula.org/?p=1523</a> about setting up DBRD in
active/standby mode and then using this to export NFS and ATAoE, but
I hadn't considered the possibility of using the same two machines
as the VM hosts. For a small business requiring an HA solution, this
might be a useful approach.<br>
<br>
Is this a more common scenario than I am imagining, and is there
anything in particular to consider when designing such a system?<br>
<br>
Kind regards,<br>
<br>
Ben<br>
<br>
<br>
On 27/10/11 11:33, Carlos Martín Sánchez wrote:
<blockquote
cite="mid:CAEPYvFJuacQcvHhmmDASUx=4X-3OHWAca=PfDAvWTQ-Kg7=58A@mail.gmail.com"
type="cite">Hi,<br>
<br>
OpenNebula can be used for the scenario you describe, even if you
are not going to take advantage of its on-demand cloud features.<br>
It will provide a centralized view and management of your Images
and VMs, what will surely help to administer and monitor your
virtualized workstations.<br>
<br>
OpenNebula can use the same computer as the front-end and host,
the only thing to keep in mind is that you need to use the shared
storage transfer manager [1] (the front-end and the hosts are
"sharing" the same storage).<br>
<br>
Knowing that all the VMs will be windows, you may want to
configure remote desktop access to the guest OS instead of VNC.<br>
<br>
Regards.<br>
<br>
[1] <a moz-do-not-send="true"
href="http://opennebula.org/documentation:rel3.0:sfs">http://opennebula.org/documentation:rel3.0:sfs</a><br>
<span style="border-collapse: collapse; color: rgb(136, 136, 136);
font-family: arial,sans-serif; font-size: 13px;">--<br>
Carlos Martín, MSc</span><font color="#888888"><br>
Project Engineer</font><br>
<span style="border-collapse: collapse; color: rgb(136, 136, 136);
font-family: arial,sans-serif; font-size: 13px;"><span
style="background-color: rgb(255, 255, 204); color: rgb(34,
34, 34);">OpenNebula</span> - The Open Source Toolkit for
Cloud Computing<br>
<a moz-do-not-send="true" 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);">OpenNebula</span>.org</a> | <a
moz-do-not-send="true" 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);">opennebula</span>.org</a></span><br>
<br>
<br>
<div class="gmail_quote">On Wed, Oct 26, 2011 at 3:55 PM, Diego
Jacobi <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:jacobidiego@gmail.com">jacobidiego@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
Hi Ben.<br>
I appreciate your answer.<br>
<br>
I was expecting to be able to install kvm, sshd, and
openNebula on the<br>
same hardware. As I would not need to provide many different<br>
technologies.<br>
I think that I would have maybe 4 VM at the same time, but the
virtual<br>
processor will be most of the time sleeping.<br>
<br>
Will this be in some software related conflict ? Or your<br>
recommendation is due to the load ?<br>
<br>
It sounds that the method you describe, involves the same
procedures<br>
as installing openNebula.<br>
<br>
Kind regards,<br>
Diego<br>
<br>
<br>
<br>
2011/10/26 Ben Tullis <<a moz-do-not-send="true"
href="mailto:bt@tiger-computing.co.uk">bt@tiger-computing.co.uk</a>>:<br>
<div>
<div class="h5">> Hi Diego,<br>
><br>
> I don't think that OpenNebula is likely to be the
best tool for the job<br>
> in this case, as it is more geared towards on-demand
cloud computing.<br>
><br>
> However, it does sound like you could really benefit
from virtualization<br>
> in the office. The way I would approach your
situation is as follows.<br>
><br>
> Make sure that the machine you're going to use as a
server has hardware<br>
> virtualization support built in.<br>
> <a moz-do-not-send="true"
href="http://en.wikipedia.org/wiki/Intel_VT#Processor"
target="_blank">http://en.wikipedia.org/wiki/Intel_VT#Processor</a><br>
><br>
> Use disks in pairs of equal sizes, then install Linux
and configure<br>
> software RAID1 so that the system will be able to
withstand a failure in<br>
> any disk.<br>
> <a moz-do-not-send="true"
href="http://en.wikipedia.org/wiki/Mdadm"
target="_blank">http://en.wikipedia.org/wiki/Mdadm</a><br>
><br>
> Install a hypervisor to enable you to run many
concurrent virtual<br>
> machines. You might like to consider KVM, Xen and
Virtualbox.<br>
> <a moz-do-not-send="true"
href="http://www.linux-kvm.org" target="_blank">http://www.linux-kvm.org</a><br>
> <a moz-do-not-send="true"
href="http://wiki.xensource.com/xenwiki/"
target="_blank">http://wiki.xensource.com/xenwiki/</a><br>
> <a moz-do-not-send="true"
href="http://virtualbox.org" target="_blank">http://virtualbox.org</a><br>
><br>
> You can then define virtual machines and install
Windows onto them, in<br>
> order to make them available to your colleagues. You
can use normal<br>
> Windows system management techniques (such as
sysprep) to deploy<br>
> pre-configured Windows system images, thereby saving
you time. You could<br>
> then use VNC to make these virtual machines available
to your staff, in<br>
> the manner that you suggest.<br>
><br>
> I'm currently looking at building an OpenNebula
cluster to support a<br>
> small-business requirement, but I can't really see
that there is any way<br>
> of ensuring high-availability in any system with
fewer than four<br>
> physical servers in it. I think you'd be making
things unnecessarily<br>
> hard for yourself if you tried to do it all on one
server.<br>
><br>
> I hope that helps.<br>
><br>
> Kind regards,<br>
> Ben<br>
><br>
> --<br>
> |Ben Tullis<br>
> |Tiger Computing Ltd<br>
> |"Linux for Business"<br>
> |<br>
> |Tel: 033 0088 1511<br>
> |Web: <a moz-do-not-send="true"
href="http://www.tiger-computing.co.uk" target="_blank">http://www.tiger-computing.co.uk</a><br>
> |<br>
> |Registered in England. Company number: 3389961<br>
> |Registered address: Wyastone Business Park,<br>
> |Wyastone Leys, Monmouth, NP25 3SR<br>
><br>
><br>
><br>
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<br>
<pre class="moz-signature" cols="72">--
|Ben Tullis
|Tiger Computing Ltd
|"Linux for Business"
|
|Tel: 033 0088 1511
|Web: <a class="moz-txt-link-freetext" href="http://www.tiger-computing.co.uk">http://www.tiger-computing.co.uk</a>
|
|Registered in England. Company number: 3389961
|Registered address: Wyastone Business Park,
|Wyastone Leys, Monmouth, NP25 3SR
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