[nova][kolla] questions on cells

melanie witt melwittt at gmail.com
Tue Oct 1 03:14:31 UTC 2019

On 9/30/19 12:08 PM, Matt Riedemann wrote:
> On 9/30/2019 12:27 PM, Dan Smith wrote:
>>> 2. Do console proxies need to live in the cells? This is what devstack
>>> does in superconductor mode. I did some digging through nova code, and
>>> it looks that way. Testing with novncproxy agrees. This suggests we
>>> need to expose a unique proxy endpoint for each cell, and configure
>>> all computes to use the right one via e.g. novncproxy_base_url,
>>> correct?
>> I'll punt this to Melanie, as she's the console expert at this point,
>> but I imagine you're right.
> Based on the Rocky spec [1] which says:
> "instead we will resolve the cell database issue by running console 
> proxies per cell instead of global to a deployment, such that the cell 
> database is local to the console proxy"
> Yes it's per-cell. There was stuff in the Rock release notes about this 
> [2] and a lot of confusion around the deprecation of the 
> nova-consoleauth service for which Mel knows the details, but it looks 
> like we really should have something documented about this too, here [3] 
> and/or here [4].

To echo, yes, console proxies need to run per cell. This used to be 
mentioned in our docs and I looked and found it got removed by the 
following commit:


so, we just need to add back the bit about running console proxies per cell.


> [1] 
> https://specs.openstack.org/openstack/nova-specs/specs/rocky/implemented/convert-consoles-to-objects.html 
> [2] https://docs.openstack.org/releasenotes/nova/rocky.html
> [3] https://docs.openstack.org/nova/latest/user/cellsv2-layout.html
> [4] https://docs.openstack.org/nova/latest/admin/remote-console-access.html

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