Open Stack

nova-network was deprecated in newton. Nova is working on moving the CI 
jobs that run against it to use Neutron only in Ocata. I'm tracking that 
work here:

https://etherpad.openstack.org/p/removing-nova-network

In an effort to make this more of a global switch in Ocata, clarkb has 
proposed a change to devstack-gate to change the default value of 
DEVSTACK_GATE_NEUTRON from 0 (nova-net) to 1 (neutron):

https://review.openstack.org/#/c/392934/

There are conditions on that which are:

1. If a job definition in project-confg sets DEVSTACK_GATE_NEUTRON 
explicitly, that's honored.

2. If not explicitly defined and the job is running against a stable 
branch, then nova-network is still the default.

There are a few jobs which are definitely nova-network specific, like 
some of the nova-net specific grenade jobs and the cells v1 job. Those 
are being explicitly handled in a series here:

https://review.openstack.org/#/c/392942/

So why should you care, you ask? First, thanks for asking. Second, as 
noted in the commit message to ^ there are several grenade jobs which 
don't explicitly define DEVSTACK_GATE_NEUTRON, like for designate and 
trove. With that change those grenade jobs will now start using neutron 
when upgrading from newton to ocata. This might work, it might not. If 
it does not work, and you know it won't work, please speak up now. 
Otherwise if things break we'll have to either (a) explicitly set 
DEVSTACK_GATE_NEUTRON=0 in those jobs or (b) cap them at stable/newton - 
either way those affected projects would have to sort out a path forward 
for continued upgrade testing in Ocata.

-- 

Thanks,

Matt Riedemann