On Mon, Apr 1, 2019, at 4:43 PM, Sergey Vilgelm wrote:

Hi Colleen,

Thank you so much. Seems I need to rewrite resource driver, but I didn’t find where the Keystone uses the `[resource] driver` option[0]. The Resource Manger just creates an instance of resource_sql.Resource[1]. I changed the `[resource] driver` option to `sql1` in the `/etc/keystone/keystone.conf` file and everything works fine :)

[0] https://github.com/openstack/keystone/blob/master/keystone/conf/resource.py#... [1] https://github.com/openstack/keystone/blob/master/keystone/resource/core.py#...

My mistake, we unfortunately removed the ability to override the resource driver a few releases ago: https://docs.openstack.org/releasenotes/keystone/pike.html#upgrade-notes It relies on foreign keys with another table and so isn't suitable to be overridden by an out-of-tree driver. Colleen

-- Sergey Vilgelm https://www.vilgelm.info

On Apr 1, 2019, 6:00 PM -0500, Colleen Murphy <colleen@gazlene.net>, wrote:

...

Hi Sergey,

On Mon, Apr 1, 2019, at 1:10 PM, Sergey Vilgelm wrote:

...

Hello community,

Please help me to figure out how to write a plugin for keystone to modify the current functionality. I planned to create a middleware, but found that the paste was removed in Rocky and now Keystone uses the hard-coded list of middleware/apps.

I need to call an additional script/api when creating a domain or a project. Is it possible to implement this without patching Keystone?

-- Sergey Vilgelm https://www.vilgelm.info

We have instructions for developing a plugin here:

https://docs.openstack.org/keystone/latest/contributor/developing-drivers.ht...

The short description is to subclass one of the base drivers (e.g. keystone.resource.backends.base.ResourceDriverBase) and to create a setuptools entrypoint for it, which you can then use to configure the driver option in keystone.conf.

The driver interface is subject to change from release to release so be sure to read the release notes and update your driver implementation.

Colleen