Nginx 代理 - proxy_set_header - 来自 site.conf 的自定义标头（用于 Varnish 缓存）

Question

是否可以在您的网站中发送自定义标头，然后使用proxy_set_header 将其转发到 Varnish？

信息

我已经稍微移动了文件夹位置 - 一切都正确包含并且可以正常工作。

我有/etc/nginx/conf.d/params/proxy.params/proxy_params 文件：

proxy_set_header Host $http_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-Port-Nginx $server_port;
proxy_set_header X-Forwarded-DocumentRoot $document_root;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Ssl-Offloaded $scheme;
proxy_set_header X-Forwarded-Custom-Location-Site 'Custom Site';   ### THIS IS THE HEADER I WANT TO BE DYNAMIC
fastcgi_param  HTTPS on;

然后在我的 https 服务器块中 sites-enabled/custom-site.conf:

server {
    listen 443 ssl default_server;
    server_tokens off;
    add_header 'Access-Control-Allow-Origin' '*';
    add_header 'Custom-Location-Site' 'mysite1';
    root /var/www/html;
    server_name nginx-glo 192.168.1.105 localhost:443;

    location / {
        access_log /var/log/nginx/access.log main;
        add_header 'Custom-Nginx-Server-Location-Root-Redirect' 'From /';   #### This header does not appear in varnishlog  (testing only)
        include /etc/nginx/conf.d/params/proxy.params/proxy_params_destination.conf;

相关proxy_params_destination.conf：

server_tokens off;

proxy_redirect off;
include /etc/nginx/conf.d/params/proxy.params/proxy_params;
# Try not to add headers using add_header, this will reset all headers from other locations
# that are redirected here.
# Also do not log to file here, log in locations above.

proxy_headers_hash_bucket_size 356;
proxy_read_timeout 3600;
proxy_connect_timeout 60;
# Cannot use https:// for proxy calls - use http, outside connection is https
proxy_pass http://varnish-cache-magento2.3.5:6081;
#proxy_pass http://web-server-apache2-magento2.3.5:8080;

我想做什么：

• 我定义了这个标题： add_header 'Custom-Location-Site' 'mysite1' 在网站配置文件中。

• 我想从每个网站的标头中接收_value_并将其转发到这里：
  proxy_set_header X-Forwarded-Custom-Location-Site $how_can_I_get_Custom-Location-Site_here;，然后让 Varnish 缓存在vcl_recv{} 中接收此标头

• 然后我将在vcl_recv{} 中处理这个转发的标头：
  使用req.http.X-Forwarded-Custom-Location-Site，如下面的示例所述。

原因：

为多个 Magento 2 站点设置清漆缓存。

• 下面 Varnish 文章中的示例显示了我如何使用 paths 来实现。我不能使用 Paths，我有多个 Docker 容器运行不同的网站，然后将其转发到 Varnish 容器。例如运行PHP 7.2 的容器，其他PHP 7.3 网站，都在内部运行/var/www/html, https

Link to sample multiple backends

示例中的相关部分：

sub vcl_recv {
    if (req.url ~ "^/java/") {
        set req.backend_hint = java;
    } else {
        set req.backend_hint = default;
    }
}

backend default {
    .host = "127.0.0.1";
    .port = "8080";
}
Now let’s add a new backend:

backend java {
    .host = "127.0.0.1";
    .port = "8000";
}

清漆日志

如图所示：varnishlog 已经在 Docker 容器中接收到我的自定义标头。我现在需要自定义标头的值是动态的。

-   ReqHeader      X-Real-IP: 192.168.1.103
-   ReqHeader      X-Forwarded-For: 192.168.1.103
-   ReqHeader      X-Forwarded-Port-Nginx: 443
-   ReqHeader      X-Forwarded-DocumentRoot: /var/www/html
-   ReqHeader      X-Forwarded-Proto: https
-   ReqHeader      Ssl-Offloaded: https
-   ReqHeader      X-Forwarded-Custom-Location-Site: Custom Site

Answer 1

如果我理解正确，这就是你需要的：

proxy_set_header X-Forwarded-Custom-Location-Site $http_custom_location_site;

这使X-Forwarded-Custom-Location-site 动态化，基于您配置Custom-Location-Site 标头的server 块。

例如，如果Custom-Location-Site 的值为mysite1，则X-Forwarded-Custom-Location-site 的值如下：

X-Forwarded-Custom-Location-site: mysite1

根据http://nginx.org/en/docs/http/ngx_http_core_module.html#var_http_，您可以将$http_ 与任何标题一起使用。您只需要将值小写，并用下划线替换破折号。