Reduce logging or number of stored logs

[153957]

frome now has log level set to DEBUG for the writer and uwsgi processes. With the new PySPARC stations that upload every event individually this causes a lot of extra log messages. We should set the log level to INFO. Or, alternatively, instead of reducing the log level, reduce the number of logs kept by the TimedRotatingFileHandler..

Recently frome was having issues accepting new events due to a full partition, caused by the large logs..

[153957]

The excess of hisparc.log-wsgi logs is caused by wsgi_app#L107.
This appends the current PID to the log file, which makes it unable to find the old logs to remove.

We could also solve this by running a cron job which removes old files, similar to the cron job on the publicdb to remove old .h5 files downloaded using sapphire.publicdb

[153957]

Something like:
find /var/log/hisparc/ -mtime +100 -delete

[tomkooij]

Rotating logfiles can (should?) be handled by syslogd or logrotate(8) or something.

That would be much easier to manage in the future.

[davidfokkema]

Yes, well... In the future, we should use something more manageable like uWSGI instead of Apache. Then everything can end up in one log, with pid in the log message. uWSGI can also automatically rotate logs, I believe.