Check Kong log rotation and longevity

[Conal-Tuohy]

Where/how log actual usage over multiple years? eg. might be in a different log?

[Conal-Tuohy]

The default setup keeps Kong's logs indefinitely, at /usr/local/kong/logs. The logs are fairly small, so there's no real concern, but a rotating log would be an improvement.

Kong's regular "file" log does not support rotation, because it retains the open file handle for a log file even after it's been rotated. However, Kong (or nginx, really) can also be set to log using syslog:
http://nginx.org/en/docs/syslog.html
http://nginx.org/en/docs/ngx_core_module.html#error_log

If we log to syslog we could use logrotate to rotate the logs as we do with the tomcat apps. e.g. /etc/logrotate.d/tomcat8 has

/var/log/tomcat8/catalina.out {
  copytruncate
  weekly
  rotate 52
  compress
  missingok
  create 640 tomcat8 adm
}```