[nova][neutron][cyborg] Bandwidth (and accel) providers are broken if CONF.host is set

Nadathur, Sundar sundar.nadathur at intel.com
Fri Nov 22 02:11:59 UTC 2019

> -----Original Message-----
> From: Eric Fried <openstack at fried.cc>
> Sent: Thursday, November 21, 2019 3:28 PM

> Action Summary
> ==============
> If the above sounds reasonable, it would entail the following actions:
> - Neutron(/Cyborg?): backportable patch to
> s/CONF.host/socket.gethostname()/
> - Nova: GET /os-hypervisors*?service_host=X in a new microversion.
> - Neutron/Cyborg: master-only patch to do the logic described in `Upgrade
> Concerns`_ (though for now without the `elif` branch).

Cyborg does use CONF.host today. We can use socket.gethostname() instead. 

On a related node, the patch for ARQ binding [1] uses instance.host, which comes from CONF.host. I'll change it to instance.node, which comes from [2], which in turn comes from get_hostname() [3].

[1] https://review.opendev.org/#/c/631244/46/nova/compute/manager.py@2634 
[2] https://github.com/openstack/nova/blob/master/nova/compute/manager.py#L9137 
[3] https://github.com/openstack/nova/blob/1cd5563f2dd2b218db2422397c8aab394d484626/nova/virt/libvirt/driver.py#L9614 

> Thanks,
> efried

Thanks & Regards,

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