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Posted to dev@cloudstack.apache.org by Nguyen Anh Tu <ng...@gmail.com> on 2013/08/05 09:23:52 UTC
[Discuss] Using XenServer 6.2's Clone-on-Boot feature on CloudStack
Hi guys,
Is anyone concerned about using XenServer 6.2's clone-on-boot feature on
CloudStack? With it, we can quickly deploy a huge of VMs from a single
golden template. This is amazing for some scenarios. For example: we can
allocate a special/dedicated cluster with only one golden template. And
when an update or patch be applied to golden template, changes
automatically apply to every VMs.
Thought?
Thanks,
--
N.g.U.y.e.N.A.n.H.t.U
Re: [Discuss] Using XenServer 6.2's Clone-on-Boot feature on
CloudStack
Posted by Harikrishna Patnala <ha...@citrix.com>.
If we can control fall back of IntelliCache reads and writes back to the storage then it won't hinder with host maintenance mode and Xenmotion, and I think it helps handling volatile VMs without recreating the root disks.
Thanks,
Harikrishna
On 09-Aug-2013, at 11:39 AM, Prasanna Santhanam <ts...@apache.org> wrote:
> On Fri, Aug 09, 2013 at 09:34:38AM +0700, Nguyen Anh Tu wrote:
>> 2013/8/9 Chiradeep Vittal <Ch...@citrix.com>
>>
>>> I think Intellicache is different. I found a discussion here:
>>> http://s.apache.org/NIX
>>>
>>>
>> I see no different. Maybe I didn't explain obviously. Let see it:
>> http://speakvirtual.com/2012/02/06/intellicache-what-how-and-when/
>> http://blogs.citrix.com/2011/06/22/xendesktop-and-local-storage-intellicache/
>>
>
> It appears Intellicache hinders with putting hosts into maintenance
> and the recently introduced XenMotion:
> https://cwiki.apache.org/confluence/x/TiTVAQ feature in cloudstack
>
> --
> Prasanna.,
>
> ------------------------
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>
Re: [Discuss] Using XenServer 6.2's Clone-on-Boot feature on
CloudStack
Posted by Prasanna Santhanam <ts...@apache.org>.
On Fri, Aug 09, 2013 at 09:34:38AM +0700, Nguyen Anh Tu wrote:
> 2013/8/9 Chiradeep Vittal <Ch...@citrix.com>
>
> > I think Intellicache is different. I found a discussion here:
> > http://s.apache.org/NIX
> >
> >
> I see no different. Maybe I didn't explain obviously. Let see it:
> http://speakvirtual.com/2012/02/06/intellicache-what-how-and-when/
> http://blogs.citrix.com/2011/06/22/xendesktop-and-local-storage-intellicache/
>
It appears Intellicache hinders with putting hosts into maintenance
and the recently introduced XenMotion:
https://cwiki.apache.org/confluence/x/TiTVAQ feature in cloudstack
--
Prasanna.,
------------------------
Powered by BigRock.com
Re: [Discuss] Using XenServer 6.2's Clone-on-Boot feature on CloudStack
Posted by Nguyen Anh Tu <ng...@gmail.com>.
2013/8/9 Chiradeep Vittal <Ch...@citrix.com>
> I think Intellicache is different. I found a discussion here:
> http://s.apache.org/NIX
>
>
I see no different. Maybe I didn't explain obviously. Let see it:
http://speakvirtual.com/2012/02/06/intellicache-what-how-and-when/
http://blogs.citrix.com/2011/06/22/xendesktop-and-local-storage-intellicache/
A short clip describes visually here:
http://www.youtube.com/watch?v=i-6ojYDdrLA
> Also, this feature https://cwiki.apache.org/confluence/x/zCPVAQ allows the
> same use case as the 'update to golden master'
>
Yeah, same same. And It will be a great feature for VDI environment like
XenDesktop or VMWare View.
--
N.g.U.y.e.N.A.n.H.t.U
Re: [Discuss] Using XenServer 6.2's Clone-on-Boot feature on
CloudStack
Posted by Chiradeep Vittal <Ch...@citrix.com>.
I think Intellicache is different. I found a discussion here:
http://s.apache.org/NIX
Also, this feature https://cwiki.apache.org/confluence/x/zCPVAQ allows the
same use case as the 'update to golden master'
On 8/6/13 8:36 AM, "Nguyen Anh Tu" <ng...@gmail.com> wrote:
>2013/8/6 Murali Reddy <Mu...@citrix.com>
>
>> So there is a 'isvolatile' flag to createServiceOffering in starting
>>from
>> 4.2. VM's created with volatile set to true will have root disks
>> re-created. Perhaps You could optimise the implementation of volatile
>>VM's
>> in case of Intellicache.
>>
>
>Oh I don't know about this flag. We can use Intelicache in CloudStack to
>reduce VM's boot times, decrease network volume and traffic, and save on
>total of storage costs. Just change allow-cache to "true".
>
>AFAIK, there is no solution that will update gold-image with out
>> recreating the VM to reflect the updates.
>>
>
>Right. And I can use VM.clone instead to do this.
>
>@All: how we need about this feature? I can make a proposal :-)
>
>Cheers,
>--
>
>N.g.U.y.e.N.A.n.H.t.U
Re: [Discuss] Using XenServer 6.2's Clone-on-Boot feature on CloudStack
Posted by Nguyen Anh Tu <ng...@gmail.com>.
2013/8/6 Murali Reddy <Mu...@citrix.com>
> So there is a 'isvolatile' flag to createServiceOffering in starting from
> 4.2. VM's created with volatile set to true will have root disks
> re-created. Perhaps You could optimise the implementation of volatile VM's
> in case of Intellicache.
>
Oh I don't know about this flag. We can use Intelicache in CloudStack to
reduce VM's boot times, decrease network volume and traffic, and save on
total of storage costs. Just change allow-cache to "true".
AFAIK, there is no solution that will update gold-image with out
> recreating the VM to reflect the updates.
>
Right. And I can use VM.clone instead to do this.
@All: how we need about this feature? I can make a proposal :-)
Cheers,
--
N.g.U.y.e.N.A.n.H.t.U
Re: [Discuss] Using XenServer 6.2's Clone-on-Boot feature on
CloudStack
Posted by Murali Reddy <Mu...@citrix.com>.
On 06/08/13 12:30 PM, "Nguyen Anh Tu" <ng...@gmail.com> wrote:
>Hi Chiradeep,
>
>Exactly Intellicache. As I know, to use this, VDIs on XenServer/XCP must
>be
>set two params:
>+ on-boot = persist (or reset). If persist, VM's data (except OS) will be
>keep when reboot. Otherwise, it will be destroy on local SR when setting
>to
>"reset".
>+ allow-caching = true. It enables cache mode on local SR.
>
>Maybe we'll add a service offering tag so AgentMgr can realize this
>option.
So there is a 'isvolatile' flag to createServiceOffering in starting from
4.2. VM's created with volatile set to true will have root disks
re-created. Perhaps You could optimise the implementation of volatile VM's
in case of Intellicache.
>Whatever we change, Xapi must set two above params for VDIs to use this
>feature. However, Intellicache seemly can't update changes to VMs which
>were booted before changing of Master image.
AFAIK, there is no solution that will update gold-image with out
recreating the VM to reflect the updates.
>
>
>2013/8/6 Chiradeep Vittal <Ch...@citrix.com>
>
>> Is this the Intellicache feature? What changes does it require from
>> CloudStack.
>> Would just using service offering tags work?
>>
>> On 8/5/13 12:23 AM, "Nguyen Anh Tu" <ng...@gmail.com> wrote:
>>
>> >Hi guys,
>> >
>> >Is anyone concerned about using XenServer 6.2's clone-on-boot feature
>>on
>> >CloudStack? With it, we can quickly deploy a huge of VMs from a single
>> >golden template. This is amazing for some scenarios. For example: we
>>can
>> >allocate a special/dedicated cluster with only one golden template. And
>> >when an update or patch be applied to golden template, changes
>> >automatically apply to every VMs.
>> >
>> >Thought?
>> >
>> >Thanks,
>> >
>> >--
>> >
>> >N.g.U.y.e.N.A.n.H.t.U
>>
>>
>
>
>--
>
>N.g.U.y.e.N.A.n.H.t.U
>
Re: [Discuss] Using XenServer 6.2's Clone-on-Boot feature on CloudStack
Posted by Nguyen Anh Tu <ng...@gmail.com>.
Hi Chiradeep,
Exactly Intellicache. As I know, to use this, VDIs on XenServer/XCP must be
set two params:
+ on-boot = persist (or reset). If persist, VM's data (except OS) will be
keep when reboot. Otherwise, it will be destroy on local SR when setting to
"reset".
+ allow-caching = true. It enables cache mode on local SR.
Maybe we'll add a service offering tag so AgentMgr can realize this option.
Whatever we change, Xapi must set two above params for VDIs to use this
feature. However, Intellicache seemly can't update changes to VMs which
were booted before changing of Master image.
2013/8/6 Chiradeep Vittal <Ch...@citrix.com>
> Is this the Intellicache feature? What changes does it require from
> CloudStack.
> Would just using service offering tags work?
>
> On 8/5/13 12:23 AM, "Nguyen Anh Tu" <ng...@gmail.com> wrote:
>
> >Hi guys,
> >
> >Is anyone concerned about using XenServer 6.2's clone-on-boot feature on
> >CloudStack? With it, we can quickly deploy a huge of VMs from a single
> >golden template. This is amazing for some scenarios. For example: we can
> >allocate a special/dedicated cluster with only one golden template. And
> >when an update or patch be applied to golden template, changes
> >automatically apply to every VMs.
> >
> >Thought?
> >
> >Thanks,
> >
> >--
> >
> >N.g.U.y.e.N.A.n.H.t.U
>
>
--
N.g.U.y.e.N.A.n.H.t.U
Re: [Discuss] Using XenServer 6.2's Clone-on-Boot feature on
CloudStack
Posted by Chiradeep Vittal <Ch...@citrix.com>.
Is this the Intellicache feature? What changes does it require from
CloudStack.
Would just using service offering tags work?
On 8/5/13 12:23 AM, "Nguyen Anh Tu" <ng...@gmail.com> wrote:
>Hi guys,
>
>Is anyone concerned about using XenServer 6.2's clone-on-boot feature on
>CloudStack? With it, we can quickly deploy a huge of VMs from a single
>golden template. This is amazing for some scenarios. For example: we can
>allocate a special/dedicated cluster with only one golden template. And
>when an update or patch be applied to golden template, changes
>automatically apply to every VMs.
>
>Thought?
>
>Thanks,
>
>--
>
>N.g.U.y.e.N.A.n.H.t.U