LOG Meeting Minutes 2017-08-15

Minutes:

1. Upstreaming progress.
2. Standarding locations, etc.: not seen as contentious.
3. MDC serialization: not seen as contentious.
4. Markers: inconclusive. 
5. Default line format: no actual progress.
6. Updated logging guide:
1. Still seen as our best hope – soft mandate.
2. No progress on any updates.
3. Michael O'Brien suggested that the next version should be a wiki page. General agreement. 
7. Logging to PersistentVolumes:
   
   1. This is a Kubernetes mechanism which ensures that files survive pod destruction.
   2. It's an overhead (albeit only by formalizing that logs are written to a file system, because they always will be), but it serves two purposes:
   1. Buffering.
   2. Acknowledges that we have no right to obliterate logfiles. (Everyone seemed to agree on this).
   3. Mentioned a Filebeat container per pod. Dave Williamson (AT&T) asked about Filebeat reading from the top of a shared file system. This was what the original enhancements proposal discussed. Action on Luke Parker. 
8. Tracing:
1. Mechanisms:
   1. MDCs and conventions: incumbent approach.
   2. Zipkin: general agreement that a rollout in ONAP would be tough.
2. Feedback from Horace Ji about how they've successfully used transaction (and other?) MDCs. 
3. General agreement that we'll stick with MDCs, Markers and conventions. 

Actions:

1. Investigate Zipkin integration, check assumptions about impact: Luke Parker
2. Propose what additional MDCs and Markers will meet outstanding tracing requirements: Luke Parker
3. Discuss Filebeat deployment topology with architects: Luke Parker