Перенаправлять не-https трафик при использовании Varnish и nginx

Я использую Stunnel, Varnish и nginx с приложением nodejs, и у меня возникают проблемы с перенаправлением страниц, отличных от https (http://manager.domain.com) на соответствующую страницу https (https://manager.domain.com). Я просто застреваю в цикле перенаправления, потому что весь трафик сначала проходит через лак. Основная причина такой настройки - использование сокетов с ssl.

Stunnel прослушивает порт 443. Он завершает SSL-соединения и передает трафик в Varnish через порт 80. Varnish прослушивает порт 80 и разделяет другой трафик по мере необходимости между Nginx на 81 и Node.js на порту 3000. Nginx прослушивает порт 81. Он обслуживает статические файлы и другие страницы, не относящиеся к Node.js.

Вот файл конфигурации nginx

upstream nodejs {
    server 127.0.0.1:3000;
    server 127.0.0.1:3000;
}

server {
    listen 81;
    server_name www.domain.net;
    rewrite ^(.*) http://domain.com$1 permanent;

}

server {
    listen 81;
    server_name manager.domain.com;
    rewrite ^(.*) https://manager.domain.com$1 permanent;

}

server {
    listen 81;
    server_name domain.com manager.domain.com help.domain.com;

    access_log /srv/www/domain.com/logs/access.log timed;
    error_log /srv/www/domain.com/logs/error.log info;
    root /srv/www/domain.com/public;

    #everything else
    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;

        proxy_pass http://nodejs/;
        proxy_redirect off;


    }



    gzip on;
    gzip_comp_level 6;
    gzip_proxied any;
    gzip_min_length  1000;
    gzip_disable     "MSIE [1-6]\."
    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
}

Любой вот файл конфигурации лака

backend default {
    .host = "127.0.0.1";
    .port = "81";
    .connect_timeout = 5s;
    .first_byte_timeout = 30s;
    .between_bytes_timeout = 60s;
    .max_connections = 800;
}

backend nodejs {
    .host = "127.0.0.1";
    .port = "3000";
    .connect_timeout = 1s;
    .first_byte_timeout = 2s;
    .between_bytes_timeout = 60s;
    .max_connections = 800;
}

sub vcl_recv {
    set req.backend = default;
    set req.grace = 120s;

    #set the correct IP so my backends don’t log all requests as coming from Varnish
    if (req.restarts == 0) {
        if (req.http.x-forwarded-for) {
            set req.http.X-Forwarded-For =
            req.http.X-Forwarded-For + ", " + client.ip;
        } else {
            set req.http.X-Forwarded-For = client.ip;
        }
    }

    #remove port, so that hostname is normalized
    set req.http.Host = regsub(req.http.Host, ":[0-9]+", "");

    #Removed: code for purging

    #part of Varnish’s default config
    if (req.request != "GET" &&
        req.request != "HEAD" &&
        req.request != "PUT" &&
        req.request != "POST" &&
        req.request != "TRACE" &&
        req.request != "OPTIONS" &&
        req.request != "DELETE") {
        /* Non-RFC2616 or CONNECT which is weird. */
        return (pipe);
    }
    if (req.request != "GET" && req.request != "HEAD") {
        return (pass);
    }

    #pipe websocket connections directly to Node.js
    if (req.http.Upgrade ~ "(?i)websocket") {
        set req.backend = nodejs;
        return (pipe);
    }

    #do not cache large static files
    if (req.url ~ "\.(avi|flv|mp(e?)g|mp4|mp3|gz|tgz|bz2|tbz|ogg)$") {
        return(pass);
    }

    #general URL manipulation and cookie removal
    #lines 60-109 from https://github.com/mattiasgeniar/varnish-3.0-configuration-templates/blob/d86d6c1d7d3d0ddaf92019dd5ef5ce66c9e53700/default.vcl

    if(req.http.Host ~"^(www\.)?domain.com"){
        #Removed: Redirect for URL normalization using error 701
        # Requests made to this path, relate to websockets - pass does not seem to work (even for XHR polling)
        if (req.url ~ "^/socket.io/") {
            set req.backend = nodejs;
            return (pipe);
        }
    #My other PHP/MySQL sites get included here, each in its own block
    }

    # part of Varnish’s default config
    if (req.http.Authorization || req.http.Cookie) {
        /* Not cacheable by default */
        return (pass);
    }
    return (lookup);
}

sub vcl_pipe {
    #we need to copy the upgrade header
    if (req.http.upgrade) {
        set bereq.http.upgrade = req.http.upgrade;
    }
    #closing the connection is necessary for some applications – I haven’t had any issues with websockets keeping the line below uncommented
    #set bereq.http.Connection = "close";
     return (pipe);
}






sub vcl_pass {
     return (pass);
}

 sub vcl_hash {
     hash_data(req.url);
     if (req.http.host) {
         hash_data(req.http.host);
     } else {
         hash_data(server.ip);
     }
     return (hash);
 }

 sub vcl_hit {
     return (deliver);
 }

 sub vcl_miss {
     return (fetch);
 }

 sub vcl_fetch {
     if (beresp.ttl <= 0s ||
         beresp.http.Set-Cookie ||
         beresp.http.Vary == "*") {
        /*
         * Mark as "Hit-For-Pass" for the next 2 minutes
         */
        set beresp.ttl = 120 s;
        return (hit_for_pass);
     }
     return (deliver);
 }

 sub vcl_deliver {
     return (deliver);
 }

 sub vcl_error {
     set obj.http.Content-Type = "text/html; charset=utf-8";
     set obj.http.Retry-After = "5";
     synthetic {"
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 <html>
   <head>
     <title>"} + obj.status + " " + obj.response + {"</title>
   </head>
   <body>
     <h1>Error "} + obj.status + " " + obj.response + {"</h1>
     <p>"} + obj.response + {"</p>
     <h3>Guru Meditation:</h3>
     <p>XID: "} + req.xid + {"</p>
     <hr>
     <p>Varnish cache server</p>
   </body>
 </html>
 "};
     return (deliver);
 }

 sub vcl_init {
    return (ok);
}

 sub vcl_fini {
    return (ok);
 }