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<p><font size="2" face="sans-serif">Hi </font><br>
<font size="2" face="sans-serif"> Sorry If I didn't understand clearly about it , looks to me the hypervisor itself hosts the instances and it should have a IP with it (like Linux host KVM instances, Linux is the hypervisor, the PC is the host)</font><br>
<font size="2" face="sans-serif"> while the host is physical node and only to be used by 'hypervisor' concept ,so I think maybe we don't need ip for the 'host' ? 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__=C7BBF72CDFF8187C8f9e8a93df938@cn.ibm.com" border="0" alt="Inactive hide details for Lingxian Kong ---12/31/2014 07:22:06 AM---Thanks Kevin for your clarification, which further affirms "><font size="2" color="#424282" face="sans-serif">Lingxian Kong ---12/31/2014 07:22:06 AM---Thanks Kevin for your clarification, which further affirms my belief that ip address should be inclu</font><br>
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<font size="1" color="#5F5F5F" face="sans-serif">From: </font><font size="1" face="sans-serif">Lingxian Kong <anlin.kong@gmail.com></font><br>
<font size="1" color="#5F5F5F" face="sans-serif">To: </font><font size="1" face="sans-serif">"OpenStack Development Mailing List (not for usage questions)" <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 07:22 AM</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">Thanks Kevin for your clarification, which further affirms my belief<br>
that ip address should be included in the host info.<br>
<br>
I will contact Jay Pipes on IRC, to see what can I help towards this<br>
effort, soon after the New Year's Day in China. :)<br>
<br>
2014-12-31 0:34 GMT+08:00 Kevin L. Mitchell <kevin.mitchell@rackspace.com>:<br>
> On Tue, 2014-12-30 at 14:52 +0800, Lingxian Kong wrote:<br>
>> Just as what Jay Lau said, 'nova hypervisor-show <hypervisor_id>'<br>
>> indeed returns host ip address, and there are more other information<br>
>> included than 'nova host-describe <hostname>'. I feel a little<br>
>> confused about the 'host' and 'hypervisor', what's the difference<br>
>> between them? For cloud operator, maybe 'host' is more usefull and<br>
>> intuitive for management than 'hypervisor'. From the implementation<br>
>> perspective, both 'compute_nodes' and 'services' database tables are<br>
>> used for them. Should them be combined for more common use cases?<br>
><br>
> Well, the host and the hypervisor are conceptually distinct objects.<br>
> The hypervisor is, obviously, the thing on which all the VMs run. The<br>
> host, though, is the node running the corresponding nova-compute<br>
> service, which may be separate from the hypervisor. For instance, on<br>
> Xen-based setups, the host runs in a VM on the hypervisor. There has<br>
> also been discussion of allowing one host to be responsible for multiple<br>
> hypervisors, which would be useful for providers with large numbers of<br>
> hypervisors.<br>
> --<br>
> Kevin L. Mitchell <kevin.mitchell@rackspace.com><br>
> Rackspace<br>
><br>
><br>
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-- <br>
Regards!<br>
-----------------------------------<br>
Lingxian Kong<br>
<br>
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