Open Stack

Is it time to resurrect this now that we're getting close to having a release which reshapes when you upgrade to it?

Eric Fried

> On Oct 29, 2018, at 22:29, Zhenyu Zheng <zhengzhenyulixi at gmail.com> wrote:
> 
> 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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