Hi, everyone! I have a very noob question. I can't understand basics.

I am trying to go through https://github.com/openstack/watcher/blob/master/doc/source/deploy/configuration.rst (watcher configuration guide). And I can not unserstand what this actually does:

$ openstack role add --project service --user watcher admin
$ openstack role add --user watcher --project admin admin

Why do I need --project service? What does it do?

According to http://docs.openstack.org/developer/python-openstackclient/command-objects/role.html#role-add (docs) it is just

--project <project>

Include <project> (name or ID)

So? What does it mean? I would love to have more info.

Thank you in advance.