CORS configuration block support

[teluka]

In order to use Gnocchi with Grafana user has to setup CORS middleware in gnocchi.conf and keystone.conf[0]

However Keystone charm doesn't provide options to configure CORS nor config-flags to configure custom section[1].

[0] https://gnocchi.xyz/grafana.html
[1] https://opendev.org/openstack/charm-keystone/src/branch/master/config.yaml

[Graeme Moss (graememoss)]

We also require the config-flags as we need to setup CADF middleware this should be a default otherwise you are locking down features of an open source application. I get that you would like to make this more user friendly but you still need to have a section for advance users to make adjustments otherwise we start looking at alternatives that do.

I would really love to at least see config-flags option be placed in keystone charm.

[Felipe Reyes (freyes)]

I would expect Keystone and/org Gnocchi to grow an interface that allows it to be related to grafana and it would do the right thing with the configuration instead of expecting the users to configure correctly the allowed_origin.

https://gnocchi.osci.io/grafana.html