Nectar Reservation System, warre is a type of beehive.
Warre is a standalone project that supports reservations in the Nectar Cloud. It uses Blazar for the actual reservations within openstack but provides some enhancements. Ideally these will be merged into Blazar at a later time but for speed of development warre was born.
A flavor in warre is much like a flavor in nova, an operator can define a flavor that is in turn used by blazar to create a nova flavor. A warre flavor has some additional attributes:
- properties - Blazar host properties
- max_length_hours - Max length of a single reservation in hours
- slots - Total available slots available for this flavor.
A flavor can be public or private. A project can be granted access to a private flavor.
A reservation maps directly to a lease in blazar. It mainly exists so we can do things like quotas etc.
- PENDING_CREATE - Reservation is pending creation in blazar
- ALLOCATED - Reservation has been successfully created in blazar
- ACTIVE - Reservation is active
- COMPLETE - Reservation is finished
- ERROR - Reservation failed to create in blazar
There are 2 quotas you can set on a project
- reservation - Total number of reservations in any state a project can have.
- hours - Sum of hours for all reservations a project can have.
Warre uses oslo-limit for quotas.
On new installs you need to first register the 2 limits and set defaults
See: openstack registered limit create
To set quota for a specific project see openstack limit create
See https://github.com/NeCTAR-RC/python-warreclient
Flask restful API server
Handles async tasks, currently this is only creating leases in blazar.
Handles notifications from blazar and updates warre reservations accordingly.
Notification will change the state of a reservations:
lease.event.start_lease -> ACTIVE
lease.event.end_lease -> COMPLETE