Trove taskmanager—A service that does the heavy lifting as far as provisioning instances, managing the lifecycle of instances, and performing operations on the database instance. Manager as the manager. The manager then redirects the handling to an object from the models. The actual handling is usually done in the models.
Trove guestagent—A service that runs within the guest instance, responsible for managing and performing operations on the database itself. The guestagent listens for RPC messages through the message bus and performs the requested operation. The Trove guestagent is similar to the taskmanager in the sense that it also listens for RabbitMQ topics.
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As in the taskmanager case, RpcDispatcher. The Manager then redirect the handling to an object usually from the dbaas. Trove conductor—A service that collects the statuses from guestagents and writes them into the Trove back-end and interacts with the guestagent via RPC. The benefit of such an improvement is that there would be only one interaction channel between the taskmanager, guestagent, and conductor—AMPQ. With the conductor, the guestagent would be able to write statuses to the Trove back-end through RPC.
10 Things You Should Know about OpenStack Trove, the Open Source Database as a Service
The beta is in the review process. There is, however, something wrong with this architecture: the direct access from the VM to the Trove back-end. Problems occur when there is no connectivity from the VM to the host, where the Trove back-end works.
The Trove community has designed a different architecture. Now it includes a new component, a Trove scheduler.
This scheduler is a service for registering scheduled tasks backup, restore, provisioning, and so on. It is still in design. Figure 2 below represents the future Trove architecture. Trove will have a rather different structure—the provisioned instances will have no direct access to the Trove back-end.
Exploring OpenStack's Trove DBaaS
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- Utilizing OpenStack Trove DBaaS for deployment management.
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