HPE Service Director
The HPE approach to OSS transformation is built on an innovative approach to modeling and designing services. The concept developed by HPE is called Dynamic Service Descriptors (DSD).
This new “dynamic descriptor” approach gets rid of the classic workflow-driven orchestration, in which the service behavior is hard-coded into the workflows. Instead, it uses a declarative language based on YAML to describe the service, its relationships, and behavior (policies). The engine takes these service descriptors, looks at the current state or configuration of the service instance, and builds a runbook at run-time to achieve the desired state.
Orchestration and workflow development for fulfillment, associated setup for assurance, which is classically completely siloed from fulfillment, and all associated “DevOps” efforts, where the major inhibitors of a short time-to-market and an agile product development. Even the notion “model-driven” systems made the operations more automated, but still workflows or rules had to be written around the model. Even worse, none of the NFV benefits comes to value, when the overarching Service Orchestration cannot keep the same pace, when developing new products, across a hybrid infrastructure of NFV, PNF, SDN, classic networks and the applications on top.
HPE’s approach goes beyond a classic “model-driven” system: the model itself contains the behavior of the orchestration. There is no need to code orchestration. The secret lies in the “intent” of any service in the model: nothing exists without a purpose. And that purpose drives – even creates – the next step in the orchestration “runbook” – whatever the as-is status is, the to-be status can be calculated.
The approach allows also to model the full assurance: instead of a separate system configuration, the assurance engines follows the data which is received from the provisioning engine: what evens and metrics to collect, how they are processed into meaningful quality indicators and what action to be taken, once they go beyond the desired status. This can trigger a new to-be status and configuration of the service, e.g. applying business policies to change the desired quality of service.
The data driving and processed by assurance is stored in a “big-data” store. This allows cognitive functions to detect problems in a probabilistic approach or to add value by optimizing infrastructure capacity use.
In a summary, the new agility to orchestrate and manage service is achieved with HPE Service Director by the following means:
1. The ability to model services including service behavior, driving a fully automated orchestration engine (intent-based service model – no need for coding workflows)
2. The ability to cope with unplanned changes (no need to plan and code different workflows for each of these)
3. The ability to address all variants of a service in a single graph, using dynamic service descriptors (DSD) instead of structural breakdowns (avoiding the explosion of model complexity and models)
4. The automatic “provisioning” of the assurance data, that is, the service dependency tree to enable service impact and root cause analysis (common data instead of siloed fulfillment and assurance, avoiding separate integration efforts in assurance for each new service)
5. The automatic “healing” of services, detecting problems and calling corrective actions from assurance to fulfillment – together with the automatic assurance data population (the “closed loop” in HPE SD)
6. Using analytics-based assurance and capacity management to allow much higher flexibility in adapting unexpected service changes and even self-learning patterns
With that concept, HPE Service Director achieves a true agile Service Factory with widely automated Operations. The envisioned goal of HPE Service Director is completely model-driven service fulfillment and service assurance, while other eco-systems of the OSS/BSS and the managed infrastructure are integrating with it.
|Categories||Networking > Hardware > Data Center Networking Platforms|
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