Add the functionality to sync resources between Neutron and Nuage VSD

https://blueprints.launchpad.net/neutron/+spec/nuage-neutron-sync

The purpose of this blueprint is to add functionality to sync resources between Neutron and Nuage VSD(Virtualized Services Directory).

Problem description

If there is any inconsistency in the state of neutron and the VSD database, there is no way to sync the resources between them.

Proposed change

The proposed change is to introduce support for state synchronization between neutron and VSD in the Nuage plugin

In case Nuage VSD loses its database or the database is restored using a backup copy, there is a possibility that the resources in Neutron and VSD are not in sync and this can lead to unexpected behavior. The sync will run as part of Nuage plugin at regular intervals.

Neutron is considered as the master. The sync logic will get the state from Neutron and will send it to VSD. VSD will compare this state with its own state and if there are less resources in VSD as compared to Neutron, the resources will be created in VSD. In case there are more resources in VSD, they will be deleted from VSD.

Sync will be controlled by two config parameters “enable_sync” and “sync_interval”. If the “enable_sync” parameter is set to true, the sync will start when Neutron server starts and will try to sync resources. The sync will run periodically at an interval specified for the “sync_interval” parameter.

Assumption: 1. If the resource exists in VSD, all of its attributes are in sync with the corresponding Neutron resource.

Alternatives

None

Data model impact

None

REST API impact

None

Security impact

None

Notifications impact

None

Other end user impact

None

Performance Impact

None

Other deployer impact

None

Developer impact

None

Implementation

Assignee(s)

Primary assignee:
sayaji15

Work Items

  • Modify the nuage plugin to add sync logic

Dependencies

None

Testing

Unit tests will be provided.

Documentation Impact

None

References

None