Cinder-Ceph Multi-Backend Example

[James Beedy]

Alex,

Thanks for the response, and nice work on the write up.

~James

On Mon, Apr 16, 2018 at 5:28 AM, alex barchiesi <alex.barchiesi at garr.it>
wrote:

> Hi James,
> at GARR we recently tested the cinder multi backend with the following
> idea in mind:
> support 3 different backends:
>
>    - a default one, for general-purpose disks like virtual machine boot
>    disks: replicated pool with replica factor equal to 3
>    - a reduced redundancy one: replicated pool with replica factor 2,
>    which should slightly improve latency
>    - a large capacity one: erasure-coded (possibly with a small frontend
>    replicated pool)
>
> Premise: we have a juju deployed O~S (spanning 3 geographical data
> centers).
>
> We configured Cinder such that it allows selection between multiple
> “Volume Types”, where each Volume Type points to a distinct Ceph pool
> within the same Ceph cluster.
>
> This is the simplest configuration, as it involves Cinder configuration
> alone. Volumes which are created can be later attached to running
> instances, but all instances will have their boot disk on the default pool
> cinder-ceph.
>
> We faced some issues as reported in details here: https://docs.google.com/
> document/d/1VSS28cvZBIOEzTOmVMWZ0o9FiVFkVLvu__ZOLxneMqQ/edit#
>
> Would be interesting to find a way to be able to select the pool also for
> the boot disk of a VM
>
> Any comment, idea, "whatever" (also on the doc) is very much appreciated
>
> best Alex
>
>
>
> Dr. Alex Barchiesi
> ____________________________________
> Senior cloud architect
> Art -Science relationships responsible
>
> GARR CSD department
>
> Rome GARR: +39 06 4962 2302
> Lausanne EPFL: +41 (0) 774215266
>
> linkedin: alex barchiesi
> <http://www.linkedin.com/profile/view?id=111538190&goback=%2Enmp_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1&trk=spm_pic>
> _____________________________________
> I started with nothing and I still have most of it.
>
>
>
> On Sat, Apr 14, 2018 at 3:25 AM, James Beedy <jamesbeedy at gmail.com> wrote:
>
>> Looking for examples that describe how to consume multiple ceph backends
>> using the cinder-ceph charm.
>>
>> Thanks
>>
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>
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