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http {
    upstream backend {
        server backend1.example.com weight=1;
        server backend2.example.com weight=2;
    }

    server {
        listen 80;
        server_name example.com;

        location / {
            proxy_pass http://backend;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
        }
    }
}

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http {
    upstream backend {
        server 192.168.1.100 weight=1;
        server 192.168.1.200 weight=2;
    }

    server {
        listen 80;
        server_name example.com;

        location / {
            proxy_pass http://backend;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
        }
    }
}

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