[openstack-dev] [nova][deployment] FYI: changes to cells v2 setup guide (pike only)
Alex Xu
soulxu at gmail.com
Mon Apr 17 03:35:16 UTC 2017
Is it strange that the 'nova service-list' and 'nova host-list' return the
hosts which didn't have host mapping yet?
How the user to know whether a host was added to a cell or not?
2017-04-14 23:45 GMT+08:00 Matt Riedemann <mriedemos at gmail.com>:
> Nova is working on adding multi-cell aware support to the compute API. A
> side effect of this is we can now have a chicken-and-egg situation during
> deployment such that if your tooling is depending on the compute API to
> list compute hosts, for example, before running the discover_hosts command,
> nothing will actually show up. This is because to list compute hosts, like
> using 'nova hypervisor-list', we get those from the cells now and until you
> run discover_hosts, they aren't mapped to a cell.
>
> The solution is to use "nova service-list --binary nova-compute" instead
> of "nova hypervisor-list" since we can pull services from all cells before
> the hosts are mapped using discover_hosts.
>
> I have a patch up to update our docs and add a release note:
>
> https://review.openstack.org/#/c/456923/
>
> I'll be updating the official install guide docs later.
>
> Note that this is master branch (Pike) only, this does not impact Ocata.
>
> --
>
> Thanks,
>
> Matt
>
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