[openstack-dev] [cinder] [nova] os-brick privsep failures and an upgrade strategy?

Angus Lees gus at inodes.org
Fri Jul 22 13:20:26 UTC 2016

On Thu, 21 Jul 2016 at 09:27 Sean Dague <sean at dague.net> wrote:

> On 07/12/2016 06:25 AM, Matt Riedemann wrote:
> <snip>
> > We probably aren't doing anything while Sean Dague is on vacation. He's
> > back next week and we have the nova/cinder meetups, so I'm planning on
> > talking about the grenade issue in person and hopefully we'll have a
> > plan by the end of next week to move forward.
> After some discussions at the Nova midcycle we threw together an
> approach where we just always allow privsep-helper from oslo.rootwrap.
> https://review.openstack.org/344450

Were these discussions captured anywhere?  I thought we'd discussed
alternatives on os-dev, reached a conclusion, implemented the changes(*),
and verified the results all a month ago - and that we were just awaiting
nova approval.  So I'm surprised to see this sudden change in direction...

(*) Changes:
mriedem's verification: https://review.openstack.org/#/c/331885/

 - Gus

We did a sniff test of this, and it worked to roll over the upgrade
> boundary, without an etc change, and work with osbrick 1.4.0 (currently
> blacklisted because of the upgrade issue). While I realize it wasn't the
> favorite approach by many it works. It's 3 lines of functional change.
> If we land this, release, and bump the minimum, we've got the upgrade
> issue solved in this cycle.
> Please take a look and see if we can agree to this path forward.
>         -Sean
> --
> Sean Dague
> http://dague.net
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