Status: DRAFT
Service Orchestrator:
1. High Level Component Definition and Architectural Relationships
2. API Definitions
2a. Exposed APIs
| Interface Name | Definition | Capabilities | Version | Status | Payload Model(s) |
|---|---|---|---|---|---|
| SO-E-01 | Service and Resource order requests | Service Instance management Health check, global and node. Infrastructure provider management (SO perspective) Infrastructure management | 3.1.2 | Production | Embedded in interface |
2b. Consumed APIs
| Interface Name | Description |
|---|---|
| SDCE-6 | Service/Resource model notification |
| POE-5 | Delegation of decision to policy logic |
| OOF-HAS-?? | Delegation of placement decision |
| AAIE-1 | Ingest/update state of services and resources |
| MCE-2 | Assign and configure infrastructure resources |
| CONE-3 | Assign and configure resources |
| APPC-?? | Assign and configure resources (Using APPC library hosted in BPEL) [Yang, REST, DMaaP] |
| VFCE-2 | Network Service LCM |
| SOL003 | Delegation of orchestration to VNFM |
| SDCE-7 | Service/Resource model query |
3. Component Description
Orchestration is the execution of various modules capabilities in harmony as a consolidated process to accomplish the desired tasks. The Service Orchestrator (SO) component of ONAP provides orchestration at a very high level, with an end to end view of the infrastructure, network, and applications.
SO's primary function is the automation of end-to-end service instance provisioning activities. SO is responsible for the instantiation and configuration of VNFs in support of overall end-to-end service instantiation, operations and management. SO executes well-defined processes to complete its objectives and is typically triggered by the receipt of service requests generated by other ONAP components or by Order Lifecycle Management in the BSS layer. The orchestration procedure is obtained from the Service Design and Creation (SDC) component of ONAP, where all service designs are created and exposed/distributed for consumption
Internally, SO is organized as a set of modules with well defined responsibility. External adapters (SDNC, OpenStack, VFC and SOL003) encapsulate most communication with external systems. Persistence is exposed to other SO modules – not externally, by DB adapters (Catalog and Request). The underlying workflow component resides in the BPEL Execution Engine. The BEPL Execution Engine also interacts with other ONAP systems such as App controllers, AAI and OOF-HAS. Interactions with SNC are hosted by the SDC Controller. Likewise the API Request Handler exposes SOs API for interaction with clients. Finally there is also a monitoring component that allows insight into the execution state of workflows.
4. Known System Limitations
https://docs.onap.org/en/dublin/submodules/so.git/docs/release-notes.html
5. System Deployment Architecture
6. New Release Capabilities
Support CCVPN extension
Support BroadBand Service Usecase
SO SOL003 plugin support
Improve PNF PnP
Improve SO internal modularity
7. References
- Interfaces: https://docs.onap.org/en/dublin/submodules/so.git/docs/api/offered_consumed_apis.html
Known system limitations: https://docs.onap.org/en/dublin/submodules/so.git/docs/release-notes.html
- Deployment information: https://docs.onap.org/en/casablanca/submodules/so.git/docs/developer_info/Working_with_SO_Docker.html