Not all Grafana log files may be rotated if Grafana is restarted

[Simon Pasquier]

When Grafana is restarted, it rotates its own log file if it hasn't been created the same day. Demonstration:

# ls -lart /var/log/grafana/
total 16
-rw-r--r-- 1 grafana grafana 1003 Jul 7 10:55 grafana.log.2016-07-08.001
drwxr-xr-x 2 grafana grafana 4096 Jul 8 09:26 .
-rw-r--r-- 1 grafana grafana 1241 Jul 8 09:50 grafana.log
drwxrwxr-x 21 root syslog 4096 Jul 11 13:58 ..

# /etc/init.d/grafana-server restart
 * Stopping Grafana Server [ OK ]
 * Starting Grafana Server [ OK ]

1# ls -lart /var/log/grafana/
total 20
-rw-r--r-- 1 grafana grafana 1003 Jul 7 10:55 grafana.log.2016-07-08.001
-rw-r--r-- 1 grafana grafana 1241 Jul 8 09:50 grafana.log.2016-07-12.001
drwxrwxr-x 21 root syslog 4096 Jul 11 13:58 ..
drwxr-xr-x 2 grafana grafana 4096 Jul 12 11:23 .
-rw-r--r-- 1 grafana grafana 908 Jul 12 11:23 grafana.log