<div dir="ltr">You can do it with QEMU. It works just fine. with the performance you can expect from nested virtualization.<br><div class="gmail_extra"><br clear="all"><div>~Swapnil<br><img src="https://www-304.ibm.com/certify/member/ccsc.nsf/CertTiv_sm.gif"><br>
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<br><br><div class="gmail_quote">On Wed, Oct 2, 2013 at 2:23 PM, Bob Ball <span dir="ltr"><<a href="mailto:bob.ball@citrix.com" target="_blank">bob.ball@citrix.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="color:#1f497d">I can’t speak for KVM, but this is certainly possible using XenServer. We’ve run nested virtualisation and nested OpenStack instances (primarily devstack instances for testing) many times.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">There is a degradation in performance, as you would expect from nested virtualisation, but it’s definitely functional.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">Bob<u></u><u></u></span></p>
<p class="MsoNormal"><a name="141786c4e6ebf884__MailEndCompose"><span style="color:#1f497d"><u></u> <u></u></span></a></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"" lang="EN-US">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"" lang="EN-US"> Marco Fornaro [mailto:<a href="mailto:Marco.Fornaro@huawei.com" target="_blank">Marco.Fornaro@huawei.com</a>]
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<b>Sent:</b> 02 October 2013 08:58<br>
<b>To:</b> <a href="mailto:openstack@lists.openstack.org" target="_blank">openstack@lists.openstack.org</a><br>
<b>Subject:</b> [Openstack] Openstack IN a Virtual Machine?<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span lang="SV">Hi All,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="SV"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a question on Openstack that is quite important for my cloud architecture:<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-family:Wingdings" lang="EN-US">à</span><span lang="EN-US">
<b>Can I have a complete Openstack instance running ON a VIRTUAL MACHINE?<u></u><u></u></b></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span lang="EN-US">Or, generalizing: can I have “nested” openstack instances?<u></u><u></u></span></b></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">…and ….If this is possible…are there any constraints?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">NOTES:<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">->I’m interested to openstack instances WITH all network features available, meaning Quantum server with (preferably) openwswitch plugin, so I would be interested in VMs with a nested openstack image that do provide or
access quatum server features…BUT even a flat DHCP network would be better than nothing!<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">->I normally use KVM as Hypervisor<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks so much for any help<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Best Regards<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Marco Fornaro<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">P.S.: if this is a “newbie” question I apology, but I cannot find a clear answer in doc (see for instance
</span><span lang="SV"><a href="https://wiki.openstack.org/wiki/HypervisorSupportMatrix" target="_blank"><span lang="EN-US">https://wiki.openstack.org/wiki/HypervisorSupportMatrix</span></a></span><span lang="EN-US">) AND perhaps some little words could save a lot of time
when trying to realize such a nested achitecture<u></u><u></u></span></p>
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