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Nginx ÊÇÒ»¸ö¸ßÐÔÄܵÄHTTPºÍ·´ÏòÊðÀíЧÀÍÆ÷ £¬ËüµÄÇ¿Ê¢¹¦Ð§ºÍÎÞаµÄÉèÖÃʹÆä³ÉΪÐí¶àÍøÕ¾ºÍЧÀ͵ÄÀíÏëÑ¡Ôñ¡£ÔÚÍøÕ¾ÔËÓªÀú³ÌÖÐ £¬ÄÑÃâ»á·ºÆð¹ÊÕϺ͸ºÔØá¯ÁëµÄÎÊÌ⡣ΪÁË°ü¹ÜÍøÕ¾µÄ¿ÉÓÃÐÔºÍÎȹÌÐÔ £¬ÎÒÃÇÐèÒªÕÆÎÕNginx upstreamÉèÖõļ¼ÇÉ¡£±¾ÎĽ«ÏêϸÏÈÈÝNginx upstreamÉèÖõÄÔ­ÀíºÍʹÓ÷½·¨ £¬²¢Í¨¹ý´úÂëʾÀýÑÝʾÔõÑùʹÓÃupstreamÉèÖÃʵÏÖÐÞ¸´ÍøÕ¾¹ÊÕϵÄÒªÁì¡£

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NginxµÄupstreamÄ£¿éÔÊÐíÎÒÃǽç˵һ×éºó¶ËЧÀÍÆ÷ £¬²¢Æ¾Ö¤Ò»¶¨µÄÕ½ÂÔת·¢¿Í»§¶ËÇëÇóµ½ÕâЩºó¶ËЧÀÍÆ÷ÉÏ¡£Í¨¹ýupstreamÉèÖà £¬¿ÉÒÔʵÏÖ¸ºÔØƽºâºÍ¹ÊÕÏתÒƵȹ¦Ð§¡£Nginxƾ֤ÉèÖõÄÕ½ÂÔ £¬×Ô¶¯Ñ¡Ôñºó¶ËЧÀÍÆ÷ £¬²¢½«¿Í»§¶ËÇëÇóת·¢µ½ËùÑ¡µÄЧÀÍÆ÷ÉÏ¡£ÔÚºó¶ËЧÀÍÆ÷¹ÊÕÏʱ £¬NginxÖ§³Ö×Ô¶¯ÌÞ³ý¹ÊÕÏЧÀÍÆ÷ £¬²¢½«ÇëÇóÖØзÖÅɵ½ÆäËûÕý³£µÄЧÀÍÆ÷ÉÏ¡£

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upstream backend {
    server backend1.example.com;
    server backend2.example.com;
    server backend3.example.com;
}

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location / {
    proxy_pass http://backend;
}

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NginxÖ§³Ö¶àÖÖ·½·¨À´¼ì²âºó¶ËЧÀÍÆ÷µÄ¿ÉÓÃÐÔ £¬°üÀ¨HTTP¡¢TCPºÍUDPµÈ¡£ÔÚupstream¿éÖÐ £¬ÎÒÃÇ¿ÉÒÔͨ¹ýÉèÖÃhealth_checkÒªº¦×ÖÀ´ÆôÓÿµ½¡¼ì²é¹¦Ð§¡£ÒÔÏÂÊÇÒ»¸öʾÀýÉèÖãº

upstream backend {
    server backend1.example.com;
    server backend2.example.com;
    server backend3.example.com;

    health_check;
}

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upstream backend {
    server backend1.example.com;
    server backend2.example.com down;
    server backend3.example.com;

    health_check;
}

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upstream backend {
    server backend1.example.com max_fails=3 fail_timeout=30s;
    server backend2.example.com down;
    server backend3.example.com max_fails=3 fail_timeout=30s;

    health_check;
}

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