[rfe] generalize ops log output channel for gelf and/or syslog targets
3 - minor
Pull request ID:
Requests to integrate with enterprise logging (or files) have been steady, if infrequent, but it seems like a good (and relatively approachable?) project to actually implement.
- graylog (open source)'s GELF format is just a json stream, and an ops log json record might actually qualify as a GELF one, not sure ,
so send-to-gelf might be a very concise
- we still get requests for files or syslog--might be issues here, still worth review
- for discussion: should we deprecate (remove) logging to Ceph RADOS objects?