[Engine-devel] Instance Types Feature

[Laszlo Hornyak]

A hidden feature is a not existing feature :)

----- Original Message -----
> From: "Tomas Jelinek" <tjelinek at redhat.com>
> To: "Laszlo Hornyak" <lhornyak at redhat.com>
> Cc: engine-devel at ovirt.org
> Sent: Wednesday, January 30, 2013 8:30:26 AM
> Subject: Re: [Engine-devel]  Instance Types Feature
> 
> > Of course after introducing the instance type in ovirt, you will
> > still have control over the instance types and create any instance
> > type you like beyond the pre-defined types you have in public
> > cloud, but you
> > will have two things to set: the instance type and the image, which
> > is more administration...
> You will still have the templates - you will be able to choose a
> template which defines both. But it will be "hidden" in advanced
> part of the dialog.
> You are right, the simple way is pretty much inspired by public
> clouds, because they do great job in making the things easy. You
> basically just say you want a small machine and attach a rhel image
> to it.
> Other advantage of separating the HW and SW configuration is that you
> can just change the HW profile (instance type) on which you are
> running, or, if the instance type changes, it gets reflected in all
> machines using this instance type.
> 
> > This is why I think keeping the template as an entity composed out
> > of an image and a instance type would be great.
> yep, it seems we will keep it :) It just will be hidden in the
> advanced options (e.g. one more click). Sounds reasonable?
> 
> ----- Original Message -----
> From: "Laszlo Hornyak" <lhornyak at redhat.com>
> To: "Tomas Jelinek" <tjelinek at redhat.com>
> Cc: engine-devel at ovirt.org
> Sent: Monday, January 28, 2013 12:16:00 PM
> Subject: Re: [Engine-devel]  Instance Types Feature
> 
> hi,
> 
> This is what I thought of:
> 
> In public clouds it is common to have pre-defined instance types e.g.
> amazon small/medium/large/x-large instance, and this is what
> customers get even if they don't like it. I guess this helps Amazon
> a lot to simplify the decision logic for vm scheduling and pricing.
> 
> In a private cloud, you choose the resources your application needs,
> therefore you can choose just as much as you need.
> 
> Of course after introducing the instance type in ovirt, you will
> still have control over the instance types and create any instance
> type you like beyond the pre-defined types you have in public cloud,
> but you will have two things to set: the instance type and the
> image, which is more administration than just working with
> templates, while most of the cases the templates were enough: you
> created both the OS image and the virtual hardware profile it is
> running on. For another image and another workload, I would most
> likely want to create another one that just fits the needs.
> 
> This is why I think keeping the template as an entity composed out of
> an image and a instance type would be great.
> 
> Laszlo
> 
> ----- Original Message -----
> > From: "Tomas Jelinek" <tjelinek at redhat.com>
> > To: "Laszlo Hornyak" <lhornyak at redhat.com>
> > Cc: engine-devel at ovirt.org
> > Sent: Friday, January 25, 2013 1:32:20 PM
> > Subject: Re: [Engine-devel]  Instance Types Feature
> > 
> > Hi Laszlo,
> > 
> > it is not useful just for public clouds - it can be pretty useful
> > for
> > private as well. But to keep the previous way, it could be done
> > this
> > way:
> > - on the advanced screen (after clicking "show advanced options"
> > you
> > can specify the template)
> > - by default you pick on basic view the instance type (e.g. HW
> > profile) and the Image (e.g. disk with some metadata such as OS
> > type). But, you can select custom instance type (equivalent to
> >  blank template) and no Image. In this case the template appears
> > also on basic view and you can select it.
> > 
> > What do you think?
> > 
> > Tomas
> > 
> > ----- Original Message -----
> > From: "Laszlo Hornyak" <lhornyak at redhat.com>
> > To: "Tomas Jelinek" <tjelinek at redhat.com>
> > Cc: engine-devel at ovirt.org
> > Sent: Tuesday, January 22, 2013 7:16:32 PM
> > Subject: Re: [Engine-devel]  Instance Types Feature
> > 
> > Hi Tomas,
> > 
> > I like the idea in general, but for me the instance types looks
> > like
> > a feature that is typical in public clouds, while in private clouds
> > it looks more like a cool extra feature for special cases.
> > Therefore
> > in my opinion it would be great to keep the old template solution
> > as
> > well to keep it simple for most users. A template could be an
> > instance type and an image together. Only the description overlap,
> > and that could be solved.
> > 
> > Thanks,
> > Laszlo
> > 
> > ----- Original Message -----
> > > From: "Tomas Jelinek" <tjelinek at redhat.com>
> > > To: engine-devel at ovirt.org
> > > Sent: Tuesday, January 22, 2013 3:09:51 PM
> > > Subject: [Engine-devel]  Instance Types Feature
> > > 
> > > Hi All,
> > > 
> > > this is the proposed new feature called instance types:
> > > http://www.ovirt.org/Features/Instance_Types
> > > 
> > > Long story short - it should basically split the VM template
> > > into:
> > > - "hardware profile" called instance types
> > > - "software profile" called image
> > > 
> > > This should enable to do something like: Create a new "small" VM
> > > and
> > > attach a disk with "RHEL + Postgres" installed.
> > > 
> > > Any comments are more than welcome!
> > > 
> > > Tomas
> > > _______________________________________________
> > > Engine-devel mailing list
> > > Engine-devel at ovirt.org
> > > http://lists.ovirt.org/mailman/listinfo/engine-devel
> > > 
> > 
>