一个ip可以对应多个域名

; example1.com.zone
$TTL 86400
@       IN      SOA     ns1.example1.com. admin.example1.com. (
                        2023010101 ; Serial
                        3600      ; Refresh
                        1800      ; Retry
                        604800    ; Expire
                        86400     ; TTL
                )
        IN      NS      ns1.example1.com.
        IN      A       192.168.1.1

; example2.com.zone
$TTL 86400
@       IN      SOA     ns1.example2.com. admin.example2.com. (
                        2023010101 ; Serial
                        3600      ; Refresh
                        1800      ; Retry
                        604800    ; Expire
                        86400     ; TTL
                )
        IN      NS      ns1.example2.com.
        IN      A       192.168.1.1

server {
    listen 80;
    server_name example1.com;

    location / {
        proxy_pass http://localhost:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

server {
    listen 80;
    server_name example2.com;

    location / {
        proxy_pass http://localhost:8001;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}