/var/log/nginx/access.log {
    weekly
    create 0664 root www
    rotate 5
    sharedscripts
    postrotate
    if [ -f /var/run/syslog-ng.pid ]; then \
    	kill -HUP `cat /var/run/syslog-ng.pid`; \
    fi;
    endscript
}

/var/log/nginx/error.log {
    weekly
    create 0644 root root
    rotate 5
    sharedscripts
    postrotate
    if [ -f /var/run/syslog-ng.pid ]; then \
    	kill -HUP `cat /var/run/syslog-ng.pid`; \
    fi;
    endscript
}