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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.<o:p></o:p></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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Bob<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></a></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Marco Fornaro [mailto:Marco.Fornaro@huawei.com]
<br>
<b>Sent:</b> 02 October 2013 08:58<br>
<b>To:</b> openstack@lists.openstack.org<br>
<b>Subject:</b> [Openstack] Openstack IN a Virtual Machine?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="SV">Hi All,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="SV"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a question on Openstack that is quite important for my cloud architecture:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Wingdings">à</span><span lang="EN-US">
<b>Can I have a complete Openstack instance running ON a VIRTUAL MACHINE?<o:p></o:p></b></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US">Or, generalizing: can I have “nested” openstack instances?<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">…and ….If this is possible…are there any constraints?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">NOTES:<o:p></o:p></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!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">->I normally use KVM as Hypervisor<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks so much for any help<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Marco Fornaro<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></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"><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<o:p></o:p></span></p>
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