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From Andrija Panic <andrija.pa...@gmail.com>
Subject Re: Enquiry on Citrix XenServer Installation for Cloudstack
Date Tue, 28 Oct 2014 08:42:33 GMT
ok, thanks for the hint Vadim, did not know that.

On 28 October 2014 09:29, Vadim Kimlaychuk <Vadim.Kimlaychuk@elion.ee>
wrote:

> Andrija,
>
>         This is true for KVM hypevisor where you can choose how "similar"
> hosts may be. In a case of In Huishan and XenServer different hosts may
> even refuse to join server pool. I didn't try personally, but expect
> problems especially if processor types are so different (like you mentioned
> - Xeon vs AMD).
>
> Vadim.
>
> -----Original Message-----
> From: Andrija Panic [mailto:andrija.panic@gmail.com]
> Sent: Tuesday, October 28, 2014 10:15 AM
> To: users@cloudstack.apache.org
> Subject: Re: Enquiry on Citrix XenServer Installation for Cloudstack
>
> Hello In Huishan,
>
> yes, should be same or similar - if you have Xeon E5-2620, and on the
> other you have Xeon E5-2650 - there is no much difference if at all, so
> these might fit into 1 cluster. You need to be aware that the liver
> migration functionality is cluster wide - so VM can be migrated between
> hosts only inside 1 cluster.
> Thah being said - it also depends what model of CPU do you expose to your
> guest...
> If you try to migrate an instance within the cluster, from one host with
> Intel to other host with AMD - it will probably fail - so you put your
> Intel hosts in 1 cluster, and AMD hosts in other, just as example.
> Check the
>
> http://cloudstack-installation.readthedocs.org/en/latest/hypervisor/kvm.html#install-and-configure-the-agent
> for CPU model, as this also might be usefull for you to understand cluster
> placement..
>
> btw, I have somewhat newer Xeon E5-2620 hosts and older E5xxx hosts in the
> same cluster, but I do not expose CPU model specific flags to VMs (just
> expose "qemu" CPU inside VM), so the live migration still works...
>
> On 28 October 2014 08:34, Vadim Kimlaychuk <Vadim.Kimlaychuk@elion.ee>
> wrote:
>
> > Hello In Huishan,
> >
> > I think you should create multiple clusters and group you hosts by CPU
> > type.  Within once cluster hosts should be the same indeed. But who
> > prohibits you to create multiple pods/clusters? Even if every host is
> > unique :)
> >
> > Vadim.
> >
> > -----Original Message-----
> > From: In Huishan [mailto:inhshn@gmail.com]
> > Sent: Tuesday, October 28, 2014 4:38 AM
> > To: users@cloudstack.apache.org
> > Subject: Enquiry on Citrix XenServer Installation for Cloudstack
> >
> > Dear All,
> >
> > I read from the Cloudstack Installation Guide, that one of system
> > requirements for XenServer hosts was:
> >
> > *All hosts within a cluster must be homogeneous. The CPUs must be of
> > the same type, count, and feature flags.*
> >
> > However, if our hosts in XenServer pool are heterogeneous. Can we will
> > use Xenserver as the hypervisor to run virtual machines in cloudstack?
> > Just for your information, I am using Cloudstack version 4.4.1, is the
> > system requirements still applicable to the new version?
> >
> > Look forward to all replies.
> >
> > Thanks
> >
> > Regards,
> > Miss In
> >
>
>
>
> --
>
> Andrija Panić
> --------------------------------------
>   http://admintweets.com
> --------------------------------------
>



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Andrija Panić
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