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<p><font size="2" face="sans-serif">ok, that make sense to me , thanks a lot</font><br>
<br>
<font size="2" face="sans-serif">Best Regards! <br>
<br>
Kevin (Chen) Ji ¼Í ³¿<br>
<br>
Engineer, zVM Development, CSTL<br>
Notes: Chen CH Ji/China/IBM@IBMCN Internet: jichenjc@cn.ibm.com<br>
Phone: +86-10-82454158<br>
Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC </font><br>
<br>
<img width="16" height="16" src="cid:1__=C7BBF72CDFE20BFD8f9e8a93df938@cn.ibm.com" border="0" alt="Inactive hide details for "Kevin L. Mitchell" ---12/31/2014 09:37:19 PM---On Wed, 2014-12-31 at 20:56 +0100, Chen CH Ji wrote: "><font size="2" color="#424282" face="sans-serif">"Kevin L. Mitchell" ---12/31/2014 09:37:19 PM---On Wed, 2014-12-31 at 20:56 +0100, Chen CH Ji wrote: > Sorry If I didn't understand cl</font><br>
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<font size="1" color="#5F5F5F" face="sans-serif">From: </font><font size="1" face="sans-serif">"Kevin L. Mitchell" <kevin.mitchell@rackspace.com></font><br>
<font size="1" color="#5F5F5F" face="sans-serif">To: </font><font size="1" face="sans-serif"><openstack-dev@lists.openstack.org></font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Date: </font><font size="1" face="sans-serif">12/31/2014 09:37 PM</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Subject: </font><font size="1" face="sans-serif">Re: [openstack-dev] [Nova] should 'ip address' be retrived when decribe host?</font><br>
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<tt><font size="2">On Wed, 2014-12-31 at 20:56 +0100, Chen CH Ji wrote:<br>
> Sorry If I didn't understand clearly about it , looks to<br>
> me the hypervisor itself hosts the instances and it should have a IP<br>
> with it (like Linux host KVM instances, Linux is the hypervisor, the<br>
> PC is the host)<br>
> while the host is physical node and only to be used by<br>
> 'hypervisor' concept ,so I think maybe we don't need ip for the<br>
> 'host' ? thanks a lot<br>
<br>
The hypervisor hosts the VMs, yes, but the component that sits between<br>
the hypervisor and the rest of nova¡ªthat is, nova-compute¡ªdoes not<br>
necessarily reside on the hypervisor. It is the nova-compute node<br>
(which may be either a VM or a physical host) that is referred to by the<br>
nova term "host". For KVM, I believe the host is often the same as the<br>
hypervisor, meaning that nova-compute runs directly on the hypervisor¡<br>
but this is not necessarily the case for all virt drivers. For example,<br>
the host for Xen-based installations is often a separate VM on the same<br>
hypervisor, which would have its own distinct IP address.<br>
-- <br>
Kevin L. Mitchell <kevin.mitchell@rackspace.com><br>
Rackspace<br>
<br>
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