1:30 a.m.
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(a)redhat.com>
To: "Tomas Jelinek" <tjelinek(a)redhat.com>
Cc: engine-devel(a)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(a)redhat.com>
To: "Laszlo Hornyak" <lhornyak(a)redhat.com>
Cc: engine-devel(a)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(a)redhat.com>
To: "Tomas Jelinek" <tjelinek(a)redhat.com>
Cc: engine-devel(a)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(a)redhat.com>
> To: engine-devel(a)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
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