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Recursive Monitoring Language in Network Function Virtualization (NFV) Infrastructure draft-cai-nfvrg-recursive-monitor-00 Xuejun Cai Catalin Meirosu Gregory Mirsky The research leading to these results has received funding from the European

  1. Recursive Monitoring Language in Network Function Virtualization (NFV) Infrastructure draft-cai-nfvrg-recursive-monitor-00 Xuejun Cai Catalin Meirosu Gregory Mirsky The research leading to these results has received funding from the European Union Seventh Framework Programme FP7/2007-2013 under grant agreement no. 619609 - the UNIFY project. The views expressed here are those of the authors only. The European Commission is not liable for any use that may be made of the information in this document NFVRG interim meeting, Heidelberg, Dec 1 st , 2015 UNIFY is co-funded by the European Commission DG CONNECT in FP7

  2. Motivation • provide an automatic way to decompose/aggregate monitoring data in different infrastructure layers • provide a way for developers and operators to easily access monitoring data collected from resources in a software-defined telecom infrastructure that contains a hierarchy of abstraction levels – several NFVRG drafts describe such infrastructure 01/12/2015 draft-cai-nfvrg-recursive-monitor-00 2

  3. Example – e2e delay 01/12/2015 draft-cai-nfvrg-recursive-monitor-00 3

  4. Example – aggregated CPU usage 01/12/2015 draft-cai-nfvrg-recursive-monitor-00 4

  5. Datalog – brief intro • Subset of Prolog • A program consists of declarative rules and a query – Rules: h <= p1, p2, ..., pn • p(x1, ..., xi, ..., xn)" are either predicates applied to arguments "xi" (variables and constants), or function symbols applied to arguments – Queries: q (m, y1, ..., yn)“ • "q" is a predicate, contains arguments "m" (a function) and "yi" (arguments for that function) 01/12/2015 draft-cai-nfvrg-recursive-monitor-00 5

  6. Simple NF-FG representation • sub(x, y): 'y' is an element of the directly descend sub- layer of 'x'; • link(x, y): direct link between elements 'x' and 'y'; • node(z): node in NF-FG • The NF-FG representation is “ground facts” for Datalog 01/12/2015 draft-cai-nfvrg-recursive-monitor-00 6

  7. Requirements for a query engine • MUST provide the capability to parse and interpret the query scripts which are written with the language • MUST be able to retrieve the NF-FG created by NFV infrastructure and translate them into Datalog based ground facts • MUST be able to query the database in which the monitoring results of primitive metric are stored • An interface between query engine and the users of the language (e.g., developer or network service operator) MUST be defined to exchange the query scripts and query results. 01/12/2015 draft-cai-nfvrg-recursive-monitor-00 7

  8. Example – e2e delay Ground rules Rule template(s) Query 01/12/2015 UNIFY presentation template 8

  9. Example – e2e delay Ground rules Rule template(s) Query 01/12/2015 draft-cai-nfvrg-recursive-monitor-00 9

  10. Conclusion • We presented a proposal on using a Datalog-derived language for automatically aggregating monitoring data in NFV environments • Next steps: – Receive feedback from the community – Provide additional templates – Enhance the NF-FG description to align with NFVRG drafts evolution 01/12/2015 draft-cai-nfvrg-recursive-monitor-00 10

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