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From Mike Tutkowski <mike.tutkow...@solidfire.com>
Subject Re: Hypervisor Questions
Date Fri, 04 Oct 2013 22:56:45 GMT
For anyone who is interested in the outcome of this thread, this seems to
answer the XenServer part:

https://cwiki.apache.org/confluence/display/CLOUDSTACK/Enabling+Storage+XenMotion+for+XenServer

"CloudStack currently allows live migration of a virtual machine from one
host to another only within a cluster."

Document was last updated June 28, 2013.


On Fri, Oct 4, 2013 at 12:41 PM, Mike Tutkowski <
mike.tutkowski@solidfire.com> wrote:

> Yeah, that's kind of what I was interested in learning about.
>
> Now that we have zone-wide primary storage, does that mean CS is able to
> issue the live migration of a VM from one cluster to another (or are we
> still confined to clusters)?
>
>
> On Fri, Oct 4, 2013 at 11:55 AM, Travis Graham <tgraham@tgraham.us> wrote:
>
>> Was that a limitation caused by the primary storage only being available
>> to a single cluster and not zone wide like 4.2.0 provides?
>>
>> Travis
>>
>> On Oct 4, 2013, at 1:52 PM, Mike Tutkowski <mike.tutkowski@solidfire.com>
>> wrote:
>>
>> > Maybe this is a silly question, but if CS handles Live Migrations, are
>> we
>> > still constrained to migrating VMs from one host to another in the same
>> > cluster?
>> >
>> > Same question for HA.
>> >
>> >
>> > On Wed, Oct 2, 2013 at 8:42 AM, Clayton Weise <cweise@keyinfo.com>
>> wrote:
>> >
>> >> AFAIK, no, but it's a great RFE that I would vote for.
>> >>
>> >> -----Original Message-----
>> >> From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
>> >> Sent: Tuesday, October 01, 2013 9:26 PM
>> >> To: dev@cloudstack.apache.org
>> >> Subject: Re: Hypervisor Questions
>> >>
>> >> Oh, and, yes, when I referred to HA, it was (as you said) with the
>> meaning
>> >> of a host going offline and VMs being restarted on other hosts
>> (perhaps in
>> >> a prioritized order if there are an insufficient number of resources to
>> >> support all of the VMs that were running on the downed host).
>> >>
>> >> Does CS support assigning a priority to a VM in case not all VMs can be
>> >> restarted on the remaining resources?
>> >>
>> >>
>> >> On Tue, Oct 1, 2013 at 6:35 PM, Mike Tutkowski <
>> >> mike.tutkowski@solidfire.com
>> >>> wrote:
>> >>
>> >>> Thanks, Clayton!
>> >>>
>> >>> Yeah, copy/paste mistake there. :) I meant it as you said.
>> >>>
>> >>>
>> >>> On Tue, Oct 1, 2013 at 4:54 PM, Clayton Weise <cweise@keyinfo.com>
>> >> wrote:
>> >>>
>> >>>> First, I think you meant to put XenServer, KVM, and VMware and not
>> >>>> XenServer 3 times in a row.  That being said I think in all cases
>> >>>> (somebody correct me if I'm wrong here) it goes something like this:
>> >>>>
>> >>>> Live Migration: Request is made by CS but carried out by the HV.
>> >>>> High Availability: More accurately it's "recovery after host failure"
>> >>>> because it's still a disruptive action when a host goes sideways,
but
>> >>>> by default this is handled by CS.  I _think_ there's an option to
let
>> >>>> the HV handle this but I'm not totally sure.
>> >>>> DRS: Managed by CS through one of several methods with the global
>> >>>> setting vm.allocation.algorithm (see below)
>> >>>>
>> >>>> 'random', 'firstfit', 'userdispersing', 'userconcentratedpod_random',
>> >>>> 'userconcentratedpod_firstfit' : Order in which hosts within a
>> >>>> cluster will be considered for VM/volume allocation.
>> >>>>
>> >>>> That being said, after deployment there isn't any further DRS
>> >>>> monitoring; it's only done at the time an instance is instantiated.
>> >>>>
>> >>>> -Clayton
>> >>>>
>> >>>> -----Original Message-----
>> >>>> From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
>> >>>> Sent: Tuesday, October 01, 2013 3:00 PM
>> >>>> To: dev@cloudstack.apache.org
>> >>>> Subject: Hypervisor Questions
>> >>>>
>> >>>> Hi,
>> >>>>
>> >>>> I was wondering if people could clarify for me what CloudStack
>> >>>> manages versus what the hypervisor manages in terms of live
>> >>>> migration, high availability, and distributed resource scheduling?
>> >>>>
>> >>>> I know it is probably different for XenServer, VMware, and KVM.
>> >>>>
>> >>>> Can people fill in the info below (managed by the management server,
>> >>>> the hypervisor, or some combination of both)?
>> >>>>
>> >>>> XenServer
>> >>>>   Live migration:
>> >>>>   High availability:
>> >>>>   Distributed Resource Scheduling:
>> >>>>
>> >>>> XenServer
>> >>>>   Live migration:
>> >>>>   High availability:
>> >>>>   Distributed Resource Scheduling:
>> >>>>
>> >>>> XenServer
>> >>>>   Live migration:
>> >>>>   High availability:
>> >>>>   Distributed Resource Scheduling:
>> >>>>
>> >>>> Thanks!
>> >>>>
>> >>>> --
>> >>>> *Mike Tutkowski*
>> >>>> *Senior CloudStack Developer, SolidFire Inc.*
>> >>>> e: mike.tutkowski@solidfire.com
>> >>>> o: 303.746.7302
>> >>>> Advancing the way the world uses the
>> >>>> cloud<http://solidfire.com/solution/overview/?video=play>
>> >>>> *(tm)*
>> >>>>
>> >>>
>> >>>
>> >>>
>> >>> --
>> >>> *Mike Tutkowski*
>> >>> *Senior CloudStack Developer, SolidFire Inc.*
>> >>> e: mike.tutkowski@solidfire.com
>> >>> o: 303.746.7302
>> >>> Advancing the way the world uses the
>> >>> cloud<http://solidfire.com/solution/overview/?video=play>
>> >>> *(tm)*
>> >>>
>> >>
>> >>
>> >>
>> >> --
>> >> *Mike Tutkowski*
>> >> *Senior CloudStack Developer, SolidFire Inc.*
>> >> e: mike.tutkowski@solidfire.com
>> >> o: 303.746.7302
>> >> Advancing the way the world uses the
>> >> cloud<http://solidfire.com/solution/overview/?video=play>
>> >> *(tm)*
>> >>
>> >
>> >
>> >
>> > --
>> > *Mike Tutkowski*
>> > *Senior CloudStack Developer, SolidFire Inc.*
>> > e: mike.tutkowski@solidfire.com
>> > o: 303.746.7302
>> > Advancing the way the world uses the
>> > cloud<http://solidfire.com/solution/overview/?video=play>
>> > *™*
>>
>>
>
>
> --
> *Mike Tutkowski*
> *Senior CloudStack Developer, SolidFire Inc.*
> e: mike.tutkowski@solidfire.com
> o: 303.746.7302
> Advancing the way the world uses the cloud<http://solidfire.com/solution/overview/?video=play>
> *™*
>



-- 
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the
cloud<http://solidfire.com/solution/overview/?video=play>
*™*

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