[Openstack] [diskimage-builder][devtest] What is the difference between seed VM and undercloud VM

严超 yanchao727 at gmail.com
Mon Aug 4 13:45:35 UTC 2014


So overcloud images are stored in glance on undercloud VM  , not on seed VM?
Is it right?

*Best Regards!*


*Chao Yan--------------**My twitter:Andy Yan @yanchao727
<https://twitter.com/yanchao727>*


*My Weibo:http://weibo.com/herewearenow
<http://weibo.com/herewearenow>--------------*


2014-08-04 21:31 GMT+08:00 Jyoti Ranjan <jranjan at gmail.com>:

> Seed cloud is bare minimal VM which is supposed to erect undercloud.
> Undercloud is supposed to act like a control station after erecting
> Overcloud. Also, Overcloud keep referring for Undercloud to update itself
> and deploy new images.
>
> Life perspective, seed existence is temporary. Undercloud and Overcloud
> will have longer life. Treat Undercloud as control station for Overcloud.
>
>
> On Mon, Aug 4, 2014 at 6:40 PM, 严超 <yanchao727 at gmail.com> wrote:
>
>> Hi, All:
>>        I am working on TripleO Devtest lately, but I got confused when
>> studying this Devtest:
>>        http://docs.openstack.org/developer/tripleo-incubator/devtest.html
>>        Overcloud is booted by undercloud, right ? Then what is the seed
>> VM node for? Overcloud images are uploaded to undercloud VM or seed VM?
>> What is the difference between seed VM and undercloud VM ?
>>
>> *Best Regards!*
>>
>>
>> *Chao Yan -------------- **My twitter:Andy Yan @yanchao727
>> <https://twitter.com/yanchao727>*
>>
>>
>> *My Weibo:http://weibo.com/herewearenow <http://weibo.com/herewearenow>
>> --------------*
>>
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>
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