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ELEMENT SYNC - Software keeps the A&AI elements with the elements in the RunTime Config DB in Sync. When the network first being established, a GetAllPNFs function from A&AI can be used on startup.
- A&AI - A&AI is still the master of valid entities in the network and provides a dynamic view of the assets (xNFs) available to ONAP
- RUN TIME DB - The RunTime DB is a master of the associate (exo-inventory) data associated with the entities.
- DYNAMIC VIEW - When a xNF appears or is removed from the system, RunTime DB records will be added/removed based on A&AI entries.
- LOGIC - When a xNF appears is removed there is logic to determine how and when something is to be updated. There is some intelligence to know what elements of update.
INDEXING:
- INDEXING - Data Records will be indexed by xNF (VNF, PNF, ANF). It would be an objective to have a similar indexing mechanism as A&AI. May also need an index to be a logical object ID.
- RETRIEVAL - How are data records retrieved efficiently. This relates how the records are indexed.
The above diagram shows the usage of RunTime DB
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- FLOW 4: Data is read from RunTime DB
Race Conditions - a hysteresis (a time difference) between writing information (from a Kafka broker) and a read request arriving before the writing has finished.
2. PRE CONDITIONS
ONAP is ready & running:
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RUN TIME - During Run Time the data and associations are DYNAMICALLY Run Time config DB updated using the schema of the records.
2.1.2 RUNTIME DB DATA LAYER
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4. Updating the RunTime Config DB – The RunTime Config DB is update.
REMOVAL - RunTime DB removes the record for that xNF
ADDITION - If AAI determines that a new xNF is added to the network, then RunTime DB needs to setup a new record for that xNF with the default data structure and configuration. Default Configuration is setup. For a new xNF a pre-defined schema record is used for that xNF.
- (a) Some information may come from A&AI.
- (b) Other values will be discovered during operation.
- (c) Some information data may have default values defined in the schema.
3.1 FLOW 3: mS/Controller Operational Info Update Flow - Writing to RunTime DB
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The describes the xNF information updates and keys based on xNF update.
3.
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3 Flow
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3
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Description:
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ONAP Component Writing to RunTime Config DB Information Flow
1. Micro Service Determines Update Needed – The mS determines an update is necessary.
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The RunTime Config DB is database is updated with the information that is needed.One case of Flow 3 is
3.1 FLOW 4: Controller Sending Configuration Info Update Flow - Writing to RunTime DB
The following UML diagram shows Where a Controller (SDN-C, SDN-R) is updates the RunTimeDB because of a configuration parameter update.
During this flow a configuration update is also sent to the PNF or VNF.
This flow is used when a Controller determines that a Config change is needed. The Controller sends a message to the xNF (via Ansible, or NetConf) . The Controller would then send an update on DMaaP which will then update the RunTime Config DB.
3.3 Flow 4 Description: Controller writes to RunTime Config DB Information Flow
1. Controller Determines Configuration Update Needed – The Controller determines an update is necessary.
The controller determines a configuration (parameter) update is needed and action needs to be taken.
2. Controller publishes on DMaaP – Publish onto DMaaP
The Controller publishes an event on to the DMaaP Bus.
3. Subscription to DMaaP – Subscription from DMaaP
The RunTime Config DB Receives the event from the DMaaP Bus.
4. Updates DB – The Database is updated
The RunTime Config DB is database is updated with the updated configuration parameter that is needed.
4. Post Conditions
4a. Post Condition (Updated DB)
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