The whole cell thing tripped me up earlier this week.  From what I understand 
it’s hard coded in the upgrade scripts to be the same as the nova_api db with 
cell0 appended to the db name but there is a patch in to change this behavior 
to match what the install docs say.  So it looks like if you just put the 
nova_cell0 db on the same host and make the credentials match your nova db 
everything will just work out.  You can double check by looking at the 
cell_mapping table entries in your nova_api db. 


> On May 26, 2017, at 10:56 AM, Massimo Sgaravatto 
> <massimo.sgarava...@gmail.com> wrote:
> 
> Hi
> 
> I am reading the RDO installation guide for Ocata. In the nova section [*] it 
> is explained how to create the nova_cell0 database, but I can't find how to 
> set the relevant connection string in the nova configuration file.
> Any hints ?
> Thanks, Massimo
> 
> 
> [*]
> https://docs.openstack.org/ocata/install-guide-rdo/nova-controller-install.html
>  
> <https://docs.openstack.org/ocata/install-guide-rdo/nova-controller-install.html>
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> OpenStack-operators@lists.openstack.org
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