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The plan : study a bit and then attempt the coa exam. If I don't pass then attend the course during openstack summit: SUSE

And what to study? I've been doing openstack admin work for the last year or two. So I have already done and used most services, except Swift. But there are some things that were only done once when each environment was setup. Also at $dayjob our code does a lot for us.

One such thing I noticed while looking through https://github.com/AJNOURI/COA/wiki/02.-Compute:-Nova

Was setting the default project quota. I wonder if that's a cli/webui/API call or service config. But a config file would be weird, unless it's in Keystone. Turns out default quotas are in each of the services' config files. It's also possible to set a default quota with for example the nova command.

Another perhaps useful thing I did was to go through the release notes for the services. $dayjob run Newton so I started with the release after that and tried to grok and look for biggest changes. Introduction of placement was one of them and I got an introduction to that while playing with devstack and "failed to create resource provider devstack" error. After looking through logs I saw a "409 conflict" HTTP error or placement was complaining that the resource already existed. So somehow during setup it was created but in the wrong way? I deleted it and restarted nova and it got created automatically and after that nova started acting a lot better :)