[nova] [cinder] [ceph] Questioning deployment choices

Tobias Urdin tobias.urdin at binero.com
Wed Apr 22 14:09:19 UTC 2020


I know that [1] has been something requested by operators before, including myself, but there hasn't
been any resources available to perform the work :(

Since there is a lot of ways you can get "locked in" when using the RBD image backend with Nova [2].

Best regards

[1] https://blueprints.launchpad.net/nova/+spec/nova-ephemeral-cinder
[2] Referring to for example Magnum, Octavia etc (For Octavia that is not the case today as they support volume-backed instances now).
From: Radosław Piliszek <radoslaw.piliszek at gmail.com>
Sent: Wednesday, April 22, 2020 9:57 AM
To: openstack-discuss
Subject: Re: [nova] [cinder] [ceph] Questioning deployment choices

On Wed, Apr 22, 2020 at 9:32 AM Radosław Piliszek
<radoslaw.piliszek at gmail.com> wrote:
> Regarding the subject, I also found this:
> https://blueprints.launchpad.net/nova/+spec/nova-ephemeral-cinder
> bp: Nova using ephemeral storage with cinder (from 2014-04-30,
> recurring 2017-04-18; not implemented)
> -yoctozepto

Also, the change referenced by Lee, introducing RBD support into Nova,
was part of:
which, based on extensive discussion there, looks like handicapped
approach at that other bp.

So, essentially, boot-from-volume existed but there was demand for
no-Cinder-interactions and Ceph was a popular choice.


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