feature-request: make log-courier logs configurable

[sysmonk]

Hi,

It would be nice if we could make the log-courier more configurable. Now, there's only option to log to syslog or not. I'd like to log to syslog, but be able to have different type of loggings - 'verbose' - the current logging, and 'info' or something like that - which would only log file rotations/reconnects/failures.

Use case: log-courier running on busy server, sending thousands of log events per second, and writing the 'Registrar received X events' every second/few times per second and flooding the logs with that. It'd be great to disable the registrar log lines, but still be able to see when log-courier fails/disconnects/reconnects. This probably can be achieved by configuring the syslog server, but... you know, it's nicer to just be able to toggle a switch in log-courier config :)

[driskell]

Absolutely, it's something I've wanted to do for a while. Those registrar events are noisy, logging at least once every 5 seconds. My original plan was to start with this specific event and just log it once to state events are successfully being submitted to the endpoint, "Endpoint X is successfully receiving events". Then it would not log again until reconnect.

[driskell]

I've started working on this.

I'm just tweaking log levels at the moment, and making the received events message debug only.
I'll also add a "Server is ack events" message. In the future I'll expand it to say which server is receiving, so you can debug easily, but that's a fair bit of extra work in the ZMQ - but it needs it since the ZMQ is a little blind at the moment

Jason