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EMQ X ʹÓÃÁË·Ö²ãµÄÈÕ־ϵͳ£¬ÔÚÈÕÖ¾¼¶±ðÉÏ£¬°üÀ¨È«¾ÖÈÕÖ¾¼¶±ð (primary log level)¡¢ÒÔ¼°¸÷ log hanlder µÄÈÕÖ¾¼¶±ð¡£

[Primary Level] -- global log level and filters 
       / \ 
[Handler 1] [Handler 2] -- log levels and filters at each handler

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ÎÒÃÇÀ´¿´Ò»Ï emqx ĬÈϰ²×°µÄ log handlers:

/opt/emqx $ emqx_ctl log handlers list
LogHandler(id=ssl_handler, level=debug, destination=console)
LogHandler(id=file, level=warning, destination=log/emqx.log)
LogHandler(id=default, level=warning, destination=console)

file: ¸ºÔðÊä³öµ½ÈÕÖ¾ÎļþµÄ log handler¡£ËüûÓÐÉèÖÃÌØÊâ¹ýÂËÌõ¼þ£¬¼´ËùÓÐÈÕÖ¾ÏûÏ¢Ö»Òª¼¶±ðÂú×ãÒªÇó¾ÍÊä³ö¡£Êä³öÄ¿µÄµØÎªÈÕÖ¾Îļþ¡£

default: ¸ºÔðÊä³öµ½¿ØÖÆÌ¨µÄ log handler¡£ËüûÓÐÉèÖÃÌØÊâ¹ýÂËÌõ¼þ£¬¼´ËùÓÐÈÕÖ¾ÏûÏ¢Ö»Òª¼¶±ðÂú×ãÒª Çó¾ÍÊä³ö¡£Êä³öÄ¿µÄµØÎª¿ØÖÆÌ¨¡£

ssl_handler: ssl µÄ log handler¡£ËüµÄ¹ýÂËÌõ¼þÉèÖÃΪµ±ÈÕÖ¾ÊÇÀ´×Ô ssl Ä£¿éʱÊä³ö¡£Êä³öÄ¿µÄµØÎª¿ØÖÆÌ¨¡£

ÈÕÖ¾ÏûÏ¢Êä³öǰ£¬Ê×Ïȼì²éÏûÏ¢ÊÇ·ñ¸ßÓÚ primary log level£¬ÈÕÖ¾ÏûϢͨ¹ý¼ì²éºóÁ÷Èë¸÷ log handler£¬ÔÙ¼ì²é¸÷ handler µÄÈÕÖ¾¼¶±ð£¬Èç¹ûÈÕÖ¾ÏûÏ¢Ò²¸ßÓÚ handler level£¬ÔòÓɶÔÓ¦µÄ handler Ö´ÐÐÏàÓ¦µÄ¹ýÂËÌõ¼þ£¬¹ýÂËÌõ¼þͨ¹ýÔòÊä³ö¡£

ÉèÏëÒ»¸ö³¡¾°£¬¼ÙÉè primary log level ÉèÖÃΪ info£¬log handler default (¸ºÔðÊä³öµ½¿ØÖÆÌ¨) µÄ¼¶±ðÉèÖÃΪdebug£¬log handler file (¸ºÔðÊä³öµ½Îļþ) µÄ¼¶±ðÉèÖÃΪ warning£º

ËäÈ» console ÈÕÖ¾ÊÇ debug ¼¶±ð£¬µ«´Ëʱ console ÈÕÖ¾Ö»ÄÜÊä³ö info ÒÔ¼° info ÒÔÉϵÄÏûÏ¢£¬ÒòΪ¾­¹ýprimary level ¹ýÂËÖ®ºó£¬Á÷µ½ default ºÍ file µÄÈÕ־ֻʣÏ info ¼°ÒÔÉϵļ¶±ð;

emqx.log.N ÎļþÀïÃæ£¬°üº¬ÁË warning ÒÔ¼° warning ÒÔÉϵÄÈÕÖ¾ÏûÏ¢¡£

ÔÚÈÕÖ¾¼¶±ðС½ÚÖÐÌáµ½µÄ log.level ÊÇÐÞ¸ÄÁËÈ«¾ÖµÄÈÕÖ¾¼¶±ð¡£Õâ°üÀ¨ primary log level ºÍ¸÷¸ö handlers µÄÈÕÖ¾¼¶±ð£¬¶¼ÉèÖÃΪÁËͬһ¸öÖµ¡£

Primary Log Level Ï൱ÓÚÒ»¸ö×ÔÀ´Ë®¹ÜµÀϵͳµÄ×Ü¿ª¹Ø£¬Ò»µ©¹Ø±ÕÔò¸÷¸ö·ÖÖ§¹ÜµÀ¶¼²»ÔÙÓÐË®Á÷ͨ¹ý¡£Õâ¸ö»úÖÆ±£Ö¤ÁËÈÕ־ϵͳµÄ¸ßÐÔÄÜÔË×÷¡£

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ÀýÈ磬½« primary log level ÒÔ¼°ËùÓÐ log handlers µÄ¼¶±ðÉèÖÃΪ debug£º

$ emqx_ctl log set-level debug

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ÀýÈ磬½« primary log level ÉèÖÃΪ debug:

$ emqx_ctl log handlers set-level file debug

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