[openstack-dev] [glance] Glance API Caching Enhancements for Edge Computing

Abhishek Kekane akekane at redhat.com
Thu Oct 4 06:08:25 UTC 2018


Hi Greg,

Have you actually filed a blueprint or specs for this in glance?
If yes could you please provide a reference for the same.


Thanks & Best Regards,

Abhishek Kekane


On Thu, Oct 4, 2018 at 12:34 AM Waines, Greg <Greg.Waines at windriver.com>
wrote:

> Glance Team,
>
>
>
> I am following up on discussions in the edge-computing PTG meetings.
>
> There were discussions on potential enhancements to Glance API Caching for
> support of the proposed MVP Edge Architecture.
>
> And I took the action to write up a blueprint and a specification for
> these enhancements ... and will follow up with implementation.
>
>
>
> I thought I’d start the discussions on the mailing list ... and if
> everyone is still in agreement,
>
> then I’ll move the high-level definition/requirements to Glance’s
> Launchpad (or Storyboard?) and
>
> write up a Glance spec and review it in Gerrit.
>
>
>
> *THE PROPOSAL:*
>
>
>
> Enhance Glance API Caching such that
>
> a)       It works between two Glance Services (i.e. Glance at a Central
> OpenStack Cloud and Glance at an Edge OpenStack Cloud)
>
> ·         i.e. current Glance API Caching only works with external
> webservers
>
> b)       Enable the Edge Cloud Glance API Caching to support the ability
> to locally use those cached images (e.g. nova boot ...)
> even when network connectivity is lost to the Central Cloud Glance Service
>
> ·         i.e. image meta-data is required in order to service a ‘nova
> boot ...’, and
>        today image meta-data is NOT cached by Glance API Caching.
>
>
>
> The proposed solution should generically work between any two Glance
> Services.
>
> e.g.
>
> ·         in a Multi-Region Environment,
>
> ·         in a StarlingX Distributed Cloud,
>
> ·         etc.
>
>
>
> The proposed solution need only deal with the Edge Cloud Glance talking to
> a single Central Cloud Glance.
>
>
>
>
>
> Let me know if you have any a questions or comments,
>
> Greg.
>
>
>
>
>
>
>
> p.s.
>
> *Background:*
>
> More info on the edge-computing group’s MVP Edge Architecture can be found
> here:
>
>
> https://www.dropbox.com/s/255x1cao14taer3/MVP-Architecture_edge-computing_PTG.pptx?dl=0
>
> and
>
>
> https://docs.google.com/document/d/1Mq6bSm_lES56S4gygEuhmMbEeCI2nBFl_U5vl50wih8/edit?ts=5baa654e#heading=h.ncllqse6iw0u
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