推荐日志配置

log_format  main  'remote_addr=[$remote_addr] http_x_forward=[$http_x_forwarded_for] time=[$time_local] request=[$request] '
        'status=[$status] byte=[$bytes_sent] elapsed=[$request_time] upstream_connect_time=[$upstream_connect_time] upstream_response_time=[$upstream_response_time] '
        'refer=[$http_referer] body=[$request_body] ua=[$http_user_agent] cookie=[$http_cookie] gzip=[$gzip_ratio] '
        'msec=[$msec] http_host=[$http_host] http_accept=[$http_accept|$http_accept_encoding|$http_accept_language] '
        'sent_http_set_cookie=[$sent_http_set_cookie]';

if ($time_iso8601 ~  "^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})") {  #日志拆分
        set $year $1;
        set $month $2;
        set $day $3;
        set $hour $4;
        set $minutes $5;
        set $seconds $6;
}
access_log /yourLogPath/prefix-$year-$month-$day-access.log main;

与此配合的crontab删除日志,每30天删除30天以前的日志

* * */30 * * cd /yourLogFilePath && find ./prefix*.log -mtime +30 |xargs -i rm {}