
<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Is it time to resurrect this now that we're getting close to having a release which reshapes when you upgrade to it?<br><br><div>Eric Fried</div><div><br>On Oct 29, 2018, at 22:29, Zhenyu Zheng <<a href="mailto:zhengzhenyulixi@gmail.com">zhengzhenyulixi@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">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</div><br><div class="gmail_quote"><div dir="ltr">On Mon, Oct 29, 2018 at 11:25 PM Matt Riedemann <<a href="mailto:mriedemos@gmail.com">mriedemos@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Given the outstanding results of my recruiting job last week [1] I have <br>

been tasked with recruiting one of our glorious and most talented <br>

contributors to work on the fast-forward-upgrade script changes needed <br>

for the reshape-provider-tree blueprint.<br>

<br>

The work item is nicely detailed in the spec [2]. A few things to keep <br>

in mind:<br>

<br>

1. There are currently no virt drivers which run the reshape routine. <br>

However, patches are up for review for libvirt [3] and xen [4]. There <br>

are also functional tests which exercise the ResourceTracker code with a <br>

faked out virt driver interface to test reshaping [5].<br>

<br>

2. The FFU entry point will mimic the reshape routine that will happen <br>

on nova-compute service startup in the ResourceTracker [6].<br>

<br>

3. The FFU script will need to run per-compute service rather than <br>

globally (or per cell) since it actually needs to call the virt driver's <br>

update_provider_tree() interface which might need to inspect the <br>

hardware (like for GPUs).<br>

<br>

Given there is already a model to follow from the ResourceTracker this <br>

should not be too hard, the work will likely mostly be writing tests.<br>

<br>

What do you get if you volunteer? The usual: fame, fortune, the respect <br>

of your peers, etc.<br>

<br>

[1] <br>

<a href="http://lists.openstack.org/pipermail/openstack-dev/2018-October/136075.html" rel="noreferrer" target="_blank">http://lists.openstack.org/pipermail/openstack-dev/2018-October/136075.html</a><br>

[2] <br>

<a href="https://specs.openstack.org/openstack/nova-specs/specs/stein/approved/reshape-provider-tree.html#offline-upgrade-script" rel="noreferrer" target="_blank">https://specs.openstack.org/openstack/nova-specs/specs/stein/approved/reshape-provider-tree.html#offline-upgrade-script</a><br>

[3] <a href="https://review.openstack.org/#/c/599208/" rel="noreferrer" target="_blank">https://review.openstack.org/#/c/599208/</a><br>

[4] <a href="https://review.openstack.org/#/c/521041/" rel="noreferrer" target="_blank">https://review.openstack.org/#/c/521041/</a><br>

[5] <br>

<a href="https://github.com/openstack/nova/blob/a0eacbf7f/nova/tests/functional/test_servers.py#L1839" rel="noreferrer" target="_blank">https://github.com/openstack/nova/blob/a0eacbf7f/nova/tests/functional/test_servers.py#L1839</a><br>

[6] <br>

<a href="https://github.com/openstack/nova/blob/a0eacbf7f/nova/compute/resource_tracker.py#L917-L940" rel="noreferrer" target="_blank">https://github.com/openstack/nova/blob/a0eacbf7f/nova/compute/resource_tracker.py#L917-L940</a><br>

<br>

-- <br>

<br>

Thanks,<br>

<br>

Matt<br>

<br>

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