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    server backend1.example.com;
    server backend2.example.com;
    server backend3.example.com;
    
    # ¿ªÆô¿µ½¡¼ì²é¹¦Ð§
    health_check;
    
    # ÉèÖÿµ½¡¼ì²éÏî
    health_check_timeout 3s;
    health_check_interval 10s;
    health_check_http_2xx;
    health_check_http_3xx;
}

server {
    listen 80;
    
    location / {
        proxy_pass http://backend;
    }
}

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http {

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upstream backend {
    server backend1.example.com;
    server backend2.example.com;
    server backend3.example.com;
    
    # ¿ªÆô¿µ½¡¼ì²éºÍ×Ô¶¯¹ÊÕϻָ´¹¦Ð§
    health_check;
    max_fails 3;
    fail_timeout 30s;
    
    # ÉèÖÿµ½¡¼ì²éÏî
    health_check_timeout 3s;
    health_check_interval 10s;
    health_check_http_2xx;
    health_check_http_3xx;
}

server {
    listen 80;
    
    location / {
        proxy_pass http://backend;
    }
}

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