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Standardization

All changes augment ONAP application logging guidelines on the ONAP wiki. 

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  • Currently: varies (though a default is loosely prescribed in ONAP application logging guidelines).
  • Affects: most ONAP components, superficially. 
  • Priority: HIGH.
  • Why: 
    • Reduced complexity. 
    • Fewer special cases:
      • Easier configuration.
      • Easier indexing.
      • Easier orchestration.
  • Notes:
    • These paths may be on a mounted persistent volume so that:
      • Logs are accessible to shippers such as Filebeat or Fluentd.
      • Logs are persistent, and independent of the lifecycle of individual containers.
    • Any indirection for multiple instances of a container writing to a shared volume can be managed in one of two ways:
      • By including a container identifier in the above spec. 
      • By deployment automation; in volume mappings, so that tenant applications don't need to know. 

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  • Currently: varies (no default prescribed by ONAP application logging guidelines).
  • Affects: most ONAP components, superficially. 
  • Priority: HIGH.
  • Why:
    • Reduced complexity. 
    • Fewer special cases, simplified automation. 
    • Certain components are presently not configurable, e.g. Portal, for which even trivial reconfiguration of logging requires reassembly of its WAR.
    • See Support for analytics pipelines. 
  • Notes:
    • This greatly simplifies deployment automation, reconfiguration, etc. 
    • These paths will normally be local to a container, not on a mounted volume, but either is fine.
    • The exact path can be fine-tuned, but:
      • The benefit of an ONAP-wide convention should be evident.
      • This corresponds to the convention implemented (updated for ONAP) by MSO and others.
      • It should be aligned with conventions for other component- and subcomponent-specific configuration documents. 

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  1. Standardized configuration, simplifying unilateral reconfiguration and automated updates. 
  2. Standardized output, simplifying the configuration of analytics pipelines. 

MDCs

The MDCs in ONAP application logging guidelines are closely matched to existing MDC usage in seed ONAP components, but there may be many arbitrarily many others, and there's no need for them to be listed in configuration. Itemizing them means changing all configuration documents when new MDCs are introduced. 

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On the basis of regularized provider configuration and output, and the work of the ONAP Operations Manager project, a complete Elastic Stack pipeline can be deployed automatically. 

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  • Filebeat shipping:
    • Line format and locations as discussed. 
    • Other shipping transports are simplified by regularized logger provider configuration. 
  • Logstash indexing.
  • Elasticsearch in a TBD minimal three-node cluster - currently a single container. 
  • Kibana Discover UI.
  • Fullly automated Kubernetes deployment based on ONAP Operations Manager.

  • Currently: Available via 20170914 master build
  • Affects: 
    • Adds analytics capability, but no impact on individual ONAP components. 
    • Reconfiguration, including replacement with OTHER analytics pipelines will be similarly transparent.
  • Priority: HIGH.
  • Why: 
    • Demonstrates a bolt-on analytics capability.
    • Provides a working analytics OOB.
    • Elastic Stack is available as FOSS. 
  • Notes:
    • Files + Filebeat are the lowest common denominator. They provide a simple mechanism for resilience, and yet require no disruptive (for example classpath) changes. 
    • Other sources of logs can be indexed, with appropriate configuration. Generally these will not be able to be correlated with an ONAP transaction, however. 

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Existing logging guidelines:

Logging providers:

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