ARC Service Orchestrator Component Description - Kohn-R11
- Chaker Al-Hakim
- Byung-Woo Jun
Page Status: Updated for Istanbul - Dec 14, 2021
Component Status: Pending PTL Updates and ArchCom Review
Last Reviewed: Dec 14, 2021
Certified by: Dec 14, 2021
1. High Level Component Definition and Architectural Relationships
2. API Definitions
2a. Exposed APIs
Interface Name | Definition | Capabilities | Version | Status | Payload Model(s) | API Spec (Swagger) |
|---|---|---|---|---|---|---|
Service and Resource order requests | Service Instance management (Service, Volume Group, VF Module, VNF, PNF and CNF) Health check, global and node. Infrastructure provider management (Certificates, networks, sub-networks, security groups) | 3.1.2 | Production | Embedded in interface | ||
SO maintenance requests | Monitoring of the SO BPMN flows. Upload of new recipe war files. | 8.0.0 | Development and Evaluation | Embedded in interface |
2b. Consumed APIs
Interface Name | Description |
|---|---|
Service/Resource model notification | |
Delegation of decision to policy logic | |
Delegation of placement decision | |
Ingest/update state of services and resources | |
Assign and configure infrastructure resources | |
Assign and configure network resources | |
Assign and configure resources | |
Delegation of Network Service LCM | |
Delegation of VNF LCM to VNFM | |
Service/Resource model query | |
Catalog API Provides catalog management interface:
| |
NSD Management API Provides NSD management interface (Align with ETSI SOL-005)
| |
VNF Management API Provides VNF management interface (Align with ETSI SOL-003)
| |
Parser API Provides Parse interface:
|
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 either created manually or 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 BPMN Execution Engine. The BPMN 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/projects/onap-so/en/latest/release-notes.html#release-notes
5. System Deployment Architecture
https://docs.onap.org/projects/onap-so/en/latest/architecture/architecture.html
6. New Release Capabilities
The new enhancements proposed