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Hi Tom,<br>
<br>
we are using an open source proxy server for this. There is only one
reason to use a VPN connection I could imagine at this moment and thats
the security aspect (just one attack point instead of n) . I don' t
know your use case, so you have to decide which method you'll prefer.
Furthermore in my opinion its more elegant to watch the vms' load for a
more flexible load balancing. How to route the traffic depends on what
public cloud provider you want to use. For e.g. Amazon there are
ec2-api-tools which gives the opportunity to ask for all running
instances (ec2-describe-instances). In the opennebula-api there should
be something like that too. <br>
<br>
Hope this will help<br>
<br>
Regards<br>
Kristof<br>
<br>
On 27.11.2010 11:45, Waterbley Tom wrote:
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<p class="MsoPlainText"><span lang="EN-GB">Hi Kristof,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-GB">First I would like to
thank you for you answer.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-GB">The solution you suggest
looks fine but isn't it better to watch to the load of the physical
machines instead of the VM's?<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-GB">We also don't exactly know
how to route te traffic to the VM's which are online to private and
public cloud.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-GB">I've been thinking about
two solutions: a proxy server or a VPN connection.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-GB">With a proxy servers we
divide traffic between private cloud and public cloud. But VM's on the
public cloud are connected direct to the internet then.<o:p></o:p></span></p>
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<p class="MsoPlainText"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-GB">With the VPN connection
instead we can bring the public cloud VM's into the private network.<o:p></o:p></span></p>
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<p class="MsoPlainText"><span lang="EN-GB">What are the advantages
and disadvantages of this two methods? <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="" lang="NL">-----Oorspronkelijk
bericht-----<br>
Van: <a class="moz-txt-link-abbreviated" href="mailto:users-bounces@lists.opennebula.org">users-bounces@lists.opennebula.org</a>
[<a class="moz-txt-link-freetext" href="mailto:users-bounces@lists.opennebula.org">mailto:users-bounces@lists.opennebula.org</a>] Namens Kristof Lange<br>
Verzonden: vrijdag 26 november 2010 18:26<br>
Aan: <a class="moz-txt-link-abbreviated" href="mailto:users@lists.opennebula.org">users@lists.opennebula.org</a><br>
Onderwerp: Re: [one-users] Load balancing in hybrid cloud</span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Hi Tom,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">or you can write an easy script, which
provides the actual cpu load as a webservice. Just install an cpu-tool
(e.p. sysstat) on your image and do requests to all of your instances.<o:p></o:p></p>
<p class="MsoPlainText">That's the way we handle loud balancing at
that moment. But let me know about your successes, when you choose the
way Ruben described.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Regards<o:p></o:p></p>
<p class="MsoPlainText">Kristof<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">On 26.11.2010 17:51, Ruben S. Montero wrote:<o:p></o:p></p>
<p class="MsoPlainText">> Hi Tom,<o:p></o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">> OpenNebula's placement algorithm
(match-making by default) only works <o:p></o:p></p>
<p class="MsoPlainText">> at allocation time. You can specify if a
VM can be placed in a local<o:p></o:p></p>
<p class="MsoPlainText">> (private) or remote (public) cloud, you
can even specify a rank to <o:p></o:p></p>
<p class="MsoPlainText">> different clouds or hosts [1], but
OpenNebula does not balance the <o:p></o:p></p>
<p class="MsoPlainText">> VMs. A load balancer could be easily
implemented with the OCA API, you <o:p></o:p></p>
<p class="MsoPlainText">> can check our JAVA[2] and Ruby[3]
bindings...<o:p></o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">> [1] <a moz-do-not-send="true"
href="http://www.opennebula.org/documentation:rel2.0:schg"><span
style="color: windowtext; text-decoration: none;">http://www.opennebula.org/documentation:rel2.0:schg</span></a><o:p></o:p></p>
<p class="MsoPlainText">> [2] <a moz-do-not-send="true"
href="http://www.opennebula.org/documentation:rel2.0:java"><span
style="color: windowtext; text-decoration: none;">http://www.opennebula.org/documentation:rel2.0:java</span></a><o:p></o:p></p>
<p class="MsoPlainText">> [3] <a moz-do-not-send="true"
href="http://www.opennebula.org/documentation:rel2.0:ruby"><span
style="color: windowtext; text-decoration: none;">http://www.opennebula.org/documentation:rel2.0:ruby</span></a><o:p></o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">> Cheers and good luck<o:p></o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">> Ruben<o:p></o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">> On Thu, Nov 25, 2010 at 5:37 PM,
Waterbley Tom<<a moz-do-not-send="true"
href="mailto:Tom.Waterbley@howest.be"><span
style="color: windowtext; text-decoration: none;">Tom.Waterbley@howest.be</span></a>>
wrote:<o:p></o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">>> Dear,<o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>> I'm currently doing a master thesis
with subject cloud computing. Now I have some questions about this cool
subject.<o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>> How is load balancing typically done
in a hybrid cloud environment?<o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>> The load balancer needs to know
which VM's are up, and what's the load of every physical machine to add
or drop VM's.<o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>> How does OpenNebula this?<o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>> Can somebody give me more
information about load balancing in hybrid clouds?<o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>> Thanks on advice!<o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>> Tom<o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>>
_______________________________________________<o:p></o:p></p>
<p class="MsoPlainText">>> Users mailing list<o:p></o:p></p>
<p class="MsoPlainText">>> <a moz-do-not-send="true"
href="mailto:Users@lists.opennebula.org"><span
style="color: windowtext; text-decoration: none;">Users@lists.opennebula.org</span></a><o:p></o:p></p>
<p class="MsoPlainText">>> <a moz-do-not-send="true"
href="http://lists.opennebula.org/listinfo.cgi/users-opennebula.org"><span
style="color: windowtext; text-decoration: none;">http://lists.opennebula.org/listinfo.cgi/users-opennebula.org</span></a><o:p></o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">>><o:p> </o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">> --<o:p></o:p></p>
<p class="MsoPlainText">> Dr. Ruben Santiago Montero<o:p></o:p></p>
<p class="MsoPlainText">> Associate Professor (Profesor Titular),
Complutense University of <o:p></o:p></p>
<p class="MsoPlainText">> Madrid<o:p></o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">> URL: <a moz-do-not-send="true"
href="http://dsa-research.org/doku.php?id=people:ruben"><span
style="color: windowtext; text-decoration: none;">http://dsa-research.org/doku.php?id=people:ruben</span></a><o:p></o:p></p>
<p class="MsoPlainText">> Weblog: <a moz-do-not-send="true"
href="http://blog.dsa-research.org/?author=7"><span
style="color: windowtext; text-decoration: none;">http://blog.dsa-research.org/?author=7</span></a><o:p></o:p></p>
<p class="MsoPlainText">>
_______________________________________________<o:p></o:p></p>
<p class="MsoPlainText">> Users mailing list<o:p></o:p></p>
<p class="MsoPlainText">> <a moz-do-not-send="true"
href="mailto:Users@lists.opennebula.org"><span
style="color: windowtext; text-decoration: none;">Users@lists.opennebula.org</span></a><o:p></o:p></p>
<p class="MsoPlainText">> <a moz-do-not-send="true"
href="http://lists.opennebula.org/listinfo.cgi/users-opennebula.org"><span
style="color: windowtext; text-decoration: none;">http://lists.opennebula.org/listinfo.cgi/users-opennebula.org</span></a><o:p></o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText">><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">_______________________________________________<o:p></o:p></p>
<p class="MsoPlainText">Users mailing list<o:p></o:p></p>
<p class="MsoPlainText"><a moz-do-not-send="true"
href="mailto:Users@lists.opennebula.org"><span
style="color: windowtext; text-decoration: none;">Users@lists.opennebula.org</span></a><o:p></o:p></p>
<p class="MsoPlainText"><a moz-do-not-send="true"
href="http://lists.opennebula.org/listinfo.cgi/users-opennebula.org"><span
style="color: windowtext; text-decoration: none;">http://lists.opennebula.org/listinfo.cgi/users-opennebula.org</span></a><o:p></o:p></p>
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