console log rotation

[samveen]

Is it possible to implement standard log rotation mechanism using signal handling?

An example of a good mechanism for log rotation is nginx, which does log rotation via SIGUSR1: when the nginx binary receives this signal, it closes and reopens the log file descriptors. This is used in tandem with logrotate by creating a configuration for nginx in /etc/logrotate.d which contains a postrotate script kill -USR1 $NGINX_PID. logrotate rotates the logs, then signals nginx to close and reopen logs so that nginx has the correct logs open for writing.

[chenglch]

@samveen , To reduce the open file handlers, the console log files under /var/log/goconserver/nodes/ are closed immediately after writing, in this way, log rotation should be supported. After some testing from @neo954 , the performance may not be influenced too much.

For the log for goconserver itself under /var/log/goconserver/server.log, HUP signal handler is used to restart the logger.