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- Most obviously, the framework must be capable of being triggered by an event or invoked, and making decisions at run time.
- It must be deployment agnostic; capable of managing policies for various Policy Decision Points (PDPs) or policy engines.
- It must be metadata driven, allowing policies to be deployed, modified, upgraded, and removed as the system executes.
- It must provide a flexible template model driven policy design approach for template policy type programming and specification of policies.
- It must be extensible, allowing straightforward integration of new PDPs, policy formats, and policy development environments.
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PolicyDevelopment provides a CRUD API for policy types and policies. The policy types and policy artifacts and their metadata (Information about policies, policy templatestypes, and their interrelations ) are stored in the PolicyDB. The PolicyDevGUI, PolicyDistribution, and other applications such as Portal can use the PolicyDevelopment API to create, update, and delete policy templates types and policies.
PolicyAdministration has two important functions:
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Consider a policy type created for managing faults on vCPE equipment in a vendor independent way. The policy type captures the generic logic required to manage the faults and specifies the vendor specific information that must be supplied to the template type for specific vendor vCPE VFs. The actual vCPE policy that is used for managing particular vCPE equipment is created by setting the parameters specified in the policy type together with the specific modeled information, rules and tasks in the policy type implementation for that vendor model of vCPE.
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All policy types must be certified as being fit for deployment prior to run time deployment. In the case of design-time via the SDC application, it is assumed the lifecycle being implemented by SDC will suffice for any policy types that are declared within the ONAP Service CSAR. For other policy types and policy type implementations, the lifecycle associated with software development process will suffice. Since models, templates and raw policies policy types and their implementations will be designed and implemented using software development best practices, they can be utilized and configured for various environments (eg. development, testing, production) as desired.
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| Lifecycle Mode | Behaviour |
|---|---|
| PASSIVE MODE | Policy execution is always rejected irrespective of PDP type. |
| ACTIVE MODE | Policy execution is executed in the live environment by the PDP. |
| SAFE MODE | Policy execution proceeds, but changes to domain state or context are not carried out. The PDP returns an indication that it is running in SAFE mode together with the action it would have performed if it was operating in ACTIVE mode. The PDP type and the policy templates types it is running must support SAFE mode operation. |
| TEST MODE | Policy execution proceeds and changes to domain and state are carried out in a test or sandbox environment. The PDP returns an indication it is running in TEST mode together with the action it has performed on the test environment. The PDP type and the policy templates types it is running must support TEST mode operation. |
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