1 .. This work is licensed under a Creative Commons Attribution 4.0 International License.
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2 .. http://creativecommons.org/licenses/by/4.0
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3 .. Copyright 2018 Huawei Technologies Co., Ltd.
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8 .. image:: images/SO_Architecture_1.png
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15 RESTful interface to northbound clients
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17 * Handle service-level and infrastructure (VNF & network) requests
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19 Service-agnostic APIs
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20 * “Service Instantiation API”
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22 Model-driven recipe selection
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23 * Use SO Catalog to map input requests to BPMN flows
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24 * Dynamic lookup based on service-model + action
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25 * Input data forwarded to BPMN flow
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27 Track open and completed requests via SO Request DB
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29 Multiple API-H modules may support different APIs
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31 **BPMN Execution Engine**
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33 Open-source Camunda platform
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34 * Support BPMN 2.0 service recipes
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36 Expose RESTful interface to API-H (unique path per recipe)
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38 Make use of common “building block” sub-flows
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40 Sequence orchestration steps for each Resource in the recipe
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41 * Request and configure network resources via SDN-C
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42 * Manage cloud resources via PO (OpenStack)
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43 * Update inventory via A&AI
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45 Perform error handling/rollback
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47 **Resource Adapters**
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49 Interfaces to lower level controllers and other ONAP components
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50 * Platform Orchestrator, SDN-Controller, APP-Controller, VFC-Controllers
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51 * Hides the details of complex interfaces (e.g. OpenStack APIs)
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52 * Expose interfaces to BPMN flows as SOAP or REST APIs
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53 * Support synchronous and asynchronous operations
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55 Provided as part of SO platform for use by all BPMN flows
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57 Use SO Catalog to map resource requests to a recipe/template
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60 * Catalog templates may be updated via self-service (outside of release cycles)
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61 * Merge input parameters with templates at run-time
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66 * Tracks open and completed requests
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69 * SO view of the SDC Catalog
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70 * service and resource models, recipes, and templates
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71 * Populated via SDC distribution service from TOSCA models
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74 * Maintain state for BPMN flows
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75 * Supports multiple active engines
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77 **SDC Distribution Client**
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79 Receive updated service models from SDC
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80 * Event-bus notifications when new models available
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81 * HTTP retrieval of models (TOSCA) and artifacts (Heat)
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83 Receive distributions as TOSCA models
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87 Support self-service updates to models and artifacts
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89 Third Party and Open Source
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90 ---------------------------
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93 Camunda (open source)
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95 **Other Open Source Components of Note:**
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98 Openstack Java SDK (“woorea”)
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