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Component Status: Pending PTL updates and ArchCom Review
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DMaaP (Data Movement as a Platform):
1 High Level Component Definition and Architectural Relationships
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DMaaP is component that provides data movement services that transports and processes data from any source to any target. It provides the capability to:
Support the transfer of messages between ONAP components, as well as to other components
Support the transfer of data between ONAP components as well as to other components.
Data Filtering capabilitiesData Compression capabilities
Data routing (file based transport)
Message routing (event based transport)
Batch and event based processing
2. DMaaP API definitions
DMaaP provides the following interfaces:
| Interface Name | Interface Definition | Interface Capabilities | API Spec (Swagger) | ||
|---|---|---|---|---|---|
| DMaaP-1 | DMaaP Bus Controller Interface Allows a DMaaP User to control the behavior of DMaaP | Provides services to enable a DMaaP user to:
| onap-dmaap-dbcapi swagger | ||
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| onap-dmaap-messagerouter swagger | |||
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| onap-dmaap-messagerouter swagger | |||
| DMaaP-4 | DMaaP Data Routing Source Interface Provides a bulk data sending publishing service to the DMaaP user | The data publisher can:
| onap-dmaap-datarouter swagger | ||
| DMaaP-5 | DMaaP Data Routing Consumption Interface Provides a bulk data consumtion consumption service to the DMaaP user | The data consumer can:
| onap-dmaap-datarouter swagger | DMaaP-6 | Strimzi kafka bridge publish interface
The
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- Retrieve individual topic details
- Retrieve a list of all topics
- Publish messages to a topic
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Strimzi kafka bridge consumer interface
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The message consumer can:
- Retrieve a list of all topics
- Retrieve individual topic details
- Subscribe / Unsubscribe to message router topics
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The current API documents can be found at:
Message Router Interface: https://docs.onap.org/projects/onap-dmaap-messagerouter-messageservice/en/latest/offeredapis/offeredapis.html- DMaaP Bus Controller Interface: https://docs.onap.org/projects/onap-dmaap-dbcapi/en/latest/api-table.html
- DMaaP Data Routing Interface: https://docs.onap.org/projects/onap-dmaap-datarouter/en/latest/offeredapis.html
The additional Strimzi Kafka Bridge api which provides ResT protocol messaging towards Kafka can be found at:
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following interface is part of the strimzi ecosystem and can be deployed in ONAP to offer a REST based interface to the kafka cluster
| Interface Name | Interface Definition | Interface Capabilities | API Spec |
|---|---|---|---|
| Strimzi Kafka Bridge | Strimzi kafka bridge interface | The kafka bridge can:
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The following interfaces are consumed by DMaaP
| Interface Name | Purpose Reason For Use | API Spec (Swagger) |
|---|---|---|
| N/A | N/A |
3. Component Description:
DMaaP consists of 3 software systems
Message Router (MR) - Message Router is a reliable, high-volume pub/sub messaging service with a RESTful HTTP API. It is intended to be deployed by Platform Service providers so that it is available to Platform clients as a web service. The service is initially built over Apache Kafka.- Data Router (DR) - The Data Routing System project is intended to provide a common framework by which data producers can make data available to data consumers and a way for potential consumers to find feeds with the data they require. The interface to DR is exposed as a RESTful web service known as the DR Publishing and Delivery API
- Data Bus Controller (BC) - Provisioning API of the Data Movement Platform that can be used for provisioning topics in the Message Router and feeds in Data Router.
4. Known system limitations
Current know known system limitations
- DMaaP Data Router uses persistent volumes to store data used by topics and its feeds. Persistent volumes need to
The K8s persistent volumes assigned must have enough storage space to handle the anticipated volume.
5. Used Models
DMaaP does not use any models.
6. System Deployment Architecture
DMaaP consists of 3 main components:
- DMaaP Message Router
- DMaaP Data Router
- DMaaP Buss Controller
7. New Capabilities in this Release
The addition optional inclusion of the Strimzi Apache Kafka project for the management of the Kafka deployment within Kuberneteskafka bridge (deployed as part of strimzi) to provide REsT access to the kafka deployment.
8. References
- DMaaP Wiki: Data Movement as a Platform Project
- DMaaP on readthedocs: https://docs.onap.org/en/latest/guides/onap-developer/developing/index.html#dmaap-data-management-as-a-platform
Message Router: https://docs.onap.org/projects/onap-dmaap-messagerouter-messageservice/en/latest/index.html#master-index- Bus Controller: https://docs.onap.org/projects/onap-dmaap-buscontroller/en/latest/index.html#master-index
- Data Router: https://docs.onap.org/projects/onap-dmaap-datarouter/en/latest/index.html#master-index
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