[openstack-dev] [nova] Volunteer needed to write reshaper FFU hook

Zhenyu Zheng zhengzhenyulixi at gmail.com
Tue Oct 30 03:29:39 UTC 2018


I would like to help since I have now finished all the downstream works.
But I may need to take some time understanding all the background
information

On Mon, Oct 29, 2018 at 11:25 PM Matt Riedemann <mriedemos at gmail.com> wrote:

> Given the outstanding results of my recruiting job last week [1] I have
> been tasked with recruiting one of our glorious and most talented
> contributors to work on the fast-forward-upgrade script changes needed
> for the reshape-provider-tree blueprint.
>
> The work item is nicely detailed in the spec [2]. A few things to keep
> in mind:
>
> 1. There are currently no virt drivers which run the reshape routine.
> However, patches are up for review for libvirt [3] and xen [4]. There
> are also functional tests which exercise the ResourceTracker code with a
> faked out virt driver interface to test reshaping [5].
>
> 2. The FFU entry point will mimic the reshape routine that will happen
> on nova-compute service startup in the ResourceTracker [6].
>
> 3. The FFU script will need to run per-compute service rather than
> globally (or per cell) since it actually needs to call the virt driver's
> update_provider_tree() interface which might need to inspect the
> hardware (like for GPUs).
>
> Given there is already a model to follow from the ResourceTracker this
> should not be too hard, the work will likely mostly be writing tests.
>
> What do you get if you volunteer? The usual: fame, fortune, the respect
> of your peers, etc.
>
> [1]
> http://lists.openstack.org/pipermail/openstack-dev/2018-October/136075.html
> [2]
>
> https://specs.openstack.org/openstack/nova-specs/specs/stein/approved/reshape-provider-tree.html#offline-upgrade-script
> [3] https://review.openstack.org/#/c/599208/
> [4] https://review.openstack.org/#/c/521041/
> [5]
>
> https://github.com/openstack/nova/blob/a0eacbf7f/nova/tests/functional/test_servers.py#L1839
> [6]
>
> https://github.com/openstack/nova/blob/a0eacbf7f/nova/compute/resource_tracker.py#L917-L940
>
> --
>
> Thanks,
>
> Matt
>
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