nginx日志按日期存储

http {

    include       mime.types;

    default_type  application/octet-stream;

    map $time_iso8601 $logdate {

        '~^(?<ymd>\d{4}-\d{2}-\d{2})' $ymd;

        default    'date-not-found';

    }

    access_log logs/access-$logdate.log;