Nginx 設定多台 web server

Nginx 和 Apache 一樣都可以設定多台 virtual hosts，服務多個站台。在此以 shinder.cc 和 www.shinder.cc 為例說明。系統為 Debian 10，預先安裝 Nginx，PHP 和 certbot 的方式請參考之前的 在 Debian 上安裝 NginX, PHP-FPM 環境和 Certbot。 以下有三個設定檔，皆位於 /etc/nginx/sites-enabled，其中 default-http 為處理 http 使其轉向到 https，另外兩個則是分別使用不同的後端技術，做為 web server 的服務功能。

# default-http
server {
    if ($host = www.shinder.cc) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    if ($host = shinder.cc) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    listen 80 ;
    listen [::]:80 ;
    server_name www.shinder.cc shinder.cc;
    return 404; # managed by Certbot
}

# shinder.cc 使用 NodeJS
server {
    server_name shinder.cc;

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/shinder.cc/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/shinder.cc/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

    location / {
        proxy_pass http://127.0.0.1:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    }
}

# www.shinder.cc 使用 PHP
server {
    server_name www.shinder.cc;

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/shinder.cc/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/shinder.cc/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

    root /var/www/html;
    index index.php index.html index.htm index.nginx-debian.html;

    location / {
        try_files $uri $uri/ =404;
    }
    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/var/run/php/php7.3-fpm.sock;
    }
}