Kolla should be able to handle connection limit for database according to infra

[Manjeet Singh Bhatia]

while deploying kolla fails to calculate connection limit for particular setup.

use case: I was using kolla on 50 nodes it had issues with database connection limit
for 1000 vms which I have set manually in mariadb and re deploy kolla. I think it will be
good if kolla can calculate it before hand and set it while deployement

[Hui Kang (huikang27)]

Hi, manjeet very nice idea. Could you post the error message you saw, as well as the command you run to fix that? Thanks. - Hui

[Steven Dake (sdake)]

I think adding calculation logic complicates the deployment significantly and doesn't account for situations in which additional scaling occurs (such as adding compute or storage nodes). This is a feature request rather then a bug. The bug you ran into has been fixed in master and stable/mitaka and you should no longer run into database limits on our target scale limits out of the box (100 node cluster with 3 controller nodes, 10 storage nodes, 87 compute nodes under full load).

[Jeffrey Zhang (jeffrey4l)]

This is already archived by http://review.openstack.org/#q,I8767cf3fb04e066cc22e796c647e944b4e4a1742,n,z