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Problem Statement
- No notification mechanism to get the virtual or physical resource state changes.
- CloudStack generates a action event and persists in the DB. By polling through listEvents API one can get to know the events that occur but there is no mechanism to enable push notifications.
- usage server which generated usage events tight coupled into orchestration
Proposal
Introduce a event bus
Use cases
- Usage/billing engines
- AMQP
- CMDB
- pub/sub notification service
Discussion topics
Implementation