[nova][ptg] Allow compute nodes to use DISK_GB from shared storage RP by using aggregate relationship

Patil, Tushar Tushar.Patil at nttdata.com
Thu Nov 21 09:30:02 UTC 2019


>> For me from the sharing disk provider feature perspective the placement
>> aggregate that is needed for the sharing to work, and any kind of nova
>> host aggregate (either synced to placement or not) is independent. The
>> placement aggregate is a must for the feature. On top of that if the
>> operator wants to create a nova host aggregate as well and sync it to
>> placement then at the end there will be two, independent placement
>> aggregates. One to express the sharing relationship and one to express
>> a host aggregate from nova. These two aggregate will not be the same as
>> the first one will have the sharing provider in it while the second one
>> doesn't.

> I tend to agree with the simplicity of this as well.

I have updated the specs as per the agreements at Shanghai PTG.
I still do see some thorny issues especially the way disk_gb information will be returned in the new micro-version os-hypervisor API. Please check "other end user impact" and "Response of os-hypervisors statistics" sections from the specs.

Please review the specs [1] and give your suggestions/feedback.

[1] : https://review.opendev.org/#/c/650188/8

Thanks,
tpatil

________________________________________
From: Matt Riedemann <mriedemos at gmail.com>
Sent: Thursday, November 14, 2019 11:02 PM
To: openstack-discuss at lists.openstack.org
Subject: Re: [nova][ptg] Allow compute nodes to use DISK_GB from shared storage RP by using aggregate relationship

On 11/14/2019 1:45 AM, Bal√°zs Gibizer wrote:
> For me from the sharing disk provider feature perspective the placement
> aggregate that is needed for the sharing to work, and any kind of nova
> host aggregate (either synced to placement or not) is independent. The
> placement aggregate is a must for the feature. On top of that if the
> operator wants to create a nova host aggregate as well and sync it to
> placement then at the end there will be two, independent placement
> aggregates. One to express the sharing relationship and one to express
> a host aggregate from nova. These two aggregate will not be the same as
> the first one will have the sharing provider in it while the second one
> doesn't.

I tend to agree with the simplicity of this as well.

--

Thanks,

Matt

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