Overview ======== This charm provides Keystone, the Openstack identity service. It's target platform is (ideally) Ubuntu LTS + Openstack. Usage ===== The following interfaces are provided: - nrpe-external-master: Used to generate Nagios checks. - identity-service: Openstack API endpoints request an entry in the Keystone service catalog + endpoint template catalog. When a relation is established, Keystone receives: service name, region, public_url, admin_url and internal_url. It first checks that the requested service is listed as a supported service. This list should stay updated to support current Openstack core services. If the service is supported, an entry in the service catalog is created, an endpoint template is created and a admin token is generated. The other end of the relation receives the token as well as info on which ports Keystone is listening on. - keystone-service: This is currently only used by Horizon/dashboard as its interaction with Keystone is different from other Openstack API services. That is, Horizon requests a Keystone role and token exists. During a relation, Horizon requests its configured default role and Keystone responds with a token and the auth + admin ports on which Keystone is listening. - identity-admin: Charms use this relation to obtain the credentials for the admin user. This is intended for charms that automatically provision users, tenants, etc. or that otherwise automate using the Openstack cluster deployment. - identity-notifications: Used to broadcast messages to any services listening on the interface. Database -------- Keystone requires a database. By default, a local sqlite database is used. The charm supports relations to a shared-db via mysql-shared interface. When a new data store is configured, the charm ensures the minimum administrator credentials exist (as configured via charm configuration) HA/Clustering ------------- VIP is only required if you plan on multi-unit clustering (requires relating with hacluster charm). The VIP becomes a highly-available API endpoint. SSL/HTTPS --------- This charm also supports SSL and HTTPS endpoints. In order to ensure SSL certificates are only created once and distributed to all units, one unit gets elected as an ssl-cert-master. One side-effect of this is that as units are scaled-out the currently elected leader needs to be running in order for nodes to sync certificates. This 'feature' is to work around the lack of native leadership election via Juju itself, a feature that is due for release some time soon but until then we have to rely on this. Also, if a keystone unit does go down, it must be removed from Juju i.e. juju destroy-unit keystone/ Otherwise it will be assumed that this unit may come back at some point and therefore must be know to be in-sync with the rest before continuing. Deploying from source --------------------- The minimum openstack-origin-git config required to deploy from source is: openstack-origin-git: include-file://keystone-juno.yaml keystone-juno.yaml repositories: - {name: requirements, repository: 'git://github.com/openstack/requirements', branch: stable/juno} - {name: keystone, repository: 'git://github.com/openstack/keystone', branch: stable/juno} Note that there are only two 'name' values the charm knows about: 'requirements' and 'keystone'. These repositories must correspond to these 'name' values. Additionally, the requirements repository must be specified first and the keystone repository must be specified last. All other repostories are installed in the order in which they are specified. The following is a full list of current tip repos (may not be up-to-date): openstack-origin-git: include-file://keystone-master.yaml keystone-master.yaml repositories: - {name: requirements, repository: 'git://github.com/openstack/requirements', branch: master} - {name: oslo-concurrency, repository: 'git://github.com/openstack/oslo.concurrency', branch: master} - {name: oslo-config, repository: 'git://github.com/openstack/oslo.config', branch: master} - {name: oslo-db, repository: 'git://github.com/openstack/oslo.db', branch: master} - {name: oslo-i18n, repository: 'git://github.com/openstack/oslo.i18n', branch: master} - {name: oslo-serialization, repository: 'git://github.com/openstack/oslo.serialization', branch: master} - {name: oslo-utils, repository: 'git://github.com/openstack/oslo.utils', branch: master} - {name: pbr, repository: 'git://github.com/openstack-dev/pbr', branch: master} - {name: python-keystoneclient, repository: 'git://github.com/openstack/python-keystoneclient', branch: master} - {name: sqlalchemy-migrate, repository: 'git://github.com/stackforge/sqlalchemy-migrate', branch: master} - {name: keystonemiddleware, repository: 'git://github.com/openstack/keystonemiddleware', branch: master} - {name: keystone, repository: 'git://github.com/openstack/keystone', branch: master}