Nginx

帶有基本身份驗證的清漆返回 401

  • October 1, 2021

我嘗試使用以下解決方案在具有基本身份驗證身份驗證的伺服器上配置 Varnish：

但這無濟於事。Varnish 日誌仍然顯示 401 錯誤：

varnishlog -g raw -i Backend_health

        0 Backend_health - mag2.default Still sick 4--X-R- 0 5 10 0.001574 0.000000 HTTP/1.1 401 Unauthorized

我的清漆配置（4.0 版）：

vcl 4.0;

import std;
# The minimal Varnish version is 4.0
# For SSL offloading, pass the following header in your proxy server or load balancer: 'X-Forwarded-Proto: https'

backend default {
   .host = "127.0.0.1";
   .port = "8080";
   .first_byte_timeout = 600s;
   .probe = {
       .url = "/health_check.php";
       .timeout = 2s;
       .interval = 5s;
       .window = 10;
       .threshold = 5;
  }
}

acl purge {
   "localhost";
}

sub vcl_recv {
   if (! req.http.Authorization ~ "Basic ZGV2OmRldg=") {
   return(synth(401, "Restricted"));
   }

   if (req.method == "PURGE") {
       if (client.ip !~ purge) {
           return (synth(405, "Method not allowed"));
       }
       # To use the X-Pool header for purging varnish during automated deployments, make sure the X-Pool header
       # has been added to the response in your backend server config. This is used, for example, by the
       # capistrano-magento2 gem for purging old content from varnish during it's deploy routine.
       if (!req.http.X-Magento-Tags-Pattern && !req.http.X-Pool) {
           return (synth(400, "X-Magento-Tags-Pattern or X-Pool header required"));
       }
       if (req.http.X-Magento-Tags-Pattern) {
         ban("obj.http.X-Magento-Tags ~ " + req.http.X-Magento-Tags-Pattern);
       }
       if (req.http.X-Pool) {
         ban("obj.http.X-Pool ~ " + req.http.X-Pool);
       }
       return (synth(200, "Purged"));
   }

   if (req.method != "GET" &&
       req.method != "HEAD" &&
       req.method != "PUT" &&
       req.method != "POST" &&
       req.method != "TRACE" &&
       req.method != "OPTIONS" &&
       req.method != "DELETE") {
         /* Non-RFC2616 or CONNECT which is weird. */
         return (pipe);
   }

   # We only deal with GET and HEAD by default
   if (req.method != "GET" && req.method != "HEAD") {
       return (pass);
   }

   # Bypass shopping cart and checkout
   if (req.url ~ "/checkout") {
       return (pass);
   }

   # Bypass health check requests
   if (req.url ~ "/pub/health_check.php") {
       return (pass);
   }

   # Set initial grace period usage status
   set req.http.grace = "none";

   # normalize url in case of leading HTTP scheme and domain
   set req.url = regsub(req.url, "^http[s]?://", "");

   # collect all cookies
   std.collect(req.http.Cookie);

   # Compression filter. See https://www.varnish-cache.org/trac/wiki/FAQ/Compression
   if (req.http.Accept-Encoding) {
       if (req.url ~ "\.(jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|swf|flv)$") {
           # No point in compressing these
           unset req.http.Accept-Encoding;
       } elsif (req.http.Accept-Encoding ~ "gzip") {
           set req.http.Accept-Encoding = "gzip";
       } elsif (req.http.Accept-Encoding ~ "deflate" && req.http.user-agent !~ "MSIE") {
           set req.http.Accept-Encoding = "deflate";
       } else {
           # unknown algorithm
           unset req.http.Accept-Encoding;
       }
   }

   # Remove all marketing get parameters to minimize the cache objects
   if (req.url ~ "(\?|&)(gclid|cx|ie|cof|siteurl|zanpid|origin|fbclid|mc_[a-z]+|utm_[a-z]+|_bta_[a-z]+)=") {
       set req.url = regsuball(req.url, "(gclid|cx|ie|cof|siteurl|zanpid|origin|fbclid|mc_[a-z]+|utm_[a-z]+|_bta_[a-z]+)=[-_A-z0-9+()%.]+&?", "");
       set req.url = regsub(req.url, "[?|&]+$", "");
   }

   # Static files caching
   if (req.url ~ "^/(pub/)?(media|static)/") {
       # Static files should not be cached by default
       return (pass);

       # But if you use a few locales and don't use CDN you can enable caching static files by commenting previous line (#return (pass);) and uncommenting next 3 lines
       #unset req.http.Https;
       #unset req.http.X-Forwarded-Proto;
       #unset req.http.Cookie;
   }

    # Authenticated GraphQL requests should not be cached by default
   if (req.url ~ "/graphql" && req.http.Authorization ~ "^Bearer") {
       return (pass);
   }

unset req.http.Authorization;
   return (hash);
}

sub vcl_hash {
   if (req.http.cookie ~ "X-Magento-Vary=") {
       hash_data(regsub(req.http.cookie, "^.*?X-Magento-Vary=([^;]+);*.*$", "\1"));
   }

   if (req.url ~ "/graphql") {
       call process_graphql_headers;
   }

   # To make sure http users don't see ssl warning
   if (req.http.X-Forwarded-Proto) {
       hash_data(req.http.X-Forwarded-Proto);
   }
   
}

sub process_graphql_headers {
   if (req.http.Store) {
       hash_data(req.http.Store);
   }
   if (req.http.Content-Currency) {
       hash_data(req.http.Content-Currency);
   }
}

sub vcl_backend_fetch {
   # auth with admin:admin
   set bereq.http.Authorization = "Basic ZGV2OmRldg==";
}

sub vcl_backend_response {

   set beresp.grace = 3d;

   if (beresp.http.content-type ~ "text") {
       set beresp.do_esi = true;
   }

   if (bereq.url ~ "\.js$" || beresp.http.content-type ~ "text") {
       set beresp.do_gzip = true;
   }

   if (beresp.http.X-Magento-Debug) {
       set beresp.http.X-Magento-Cache-Control = beresp.http.Cache-Control;
   }

   # cache only successfully responses and 404s
   if (beresp.status != 200 && beresp.status != 404) {
       set beresp.ttl = 0s;
       set beresp.uncacheable = true;
       return (deliver);
   } elsif (beresp.http.Cache-Control ~ "private") {
       set beresp.uncacheable = true;
       set beresp.ttl = 86400s;
       return (deliver);
   }

   # validate if we need to cache it and prevent from setting cookie
   if (beresp.ttl > 0s && (bereq.method == "GET" || bereq.method == "HEAD")) {
       unset beresp.http.set-cookie;
   }

  # If page is not cacheable then bypass varnish for 2 minutes as Hit-For-Pass
  if (beresp.ttl <= 0s ||
      beresp.http.Surrogate-control ~ "no-store" ||
      (!beresp.http.Surrogate-Control &&
      beresp.http.Cache-Control ~ "no-cache|no-store") ||
      beresp.http.Vary == "*") {
      # Mark as Hit-For-Pass for the next 2 minutes
       set beresp.ttl = 120s;
       set beresp.uncacheable = true;
   }

   return (deliver);
}

sub vcl_deliver {
   if (resp.http.X-Magento-Debug) {
       if (resp.http.x-varnish ~ " ") {
           set resp.http.X-Magento-Cache-Debug = "HIT";
           set resp.http.Grace = req.http.grace;
       } else {
           set resp.http.X-Magento-Cache-Debug = "MISS";
       }
   } else {
       unset resp.http.Age;
   }

   # Not letting browser to cache non-static files.
   if (resp.http.Cache-Control !~ "private" && req.url !~ "^/(pub/)?(media|static)/") {
       set resp.http.Pragma = "no-cache";
       set resp.http.Expires = "-1";
       set resp.http.Cache-Control = "no-store, no-cache, must-revalidate, max-age=0";
   }

   unset resp.http.X-Magento-Debug;
   unset resp.http.X-Magento-Tags;
   unset resp.http.X-Powered-By;
   unset resp.http.Server;
   unset resp.http.X-Varnish;
   unset resp.http.Via;
   unset resp.http.Link;
}

sub vcl_hit {
   if (obj.ttl >= 0s) {
       # Hit within TTL period
       return (deliver);
   }
   if (std.healthy(req.backend_hint)) {
       if (obj.ttl + 300s > 0s) {
           # Hit after TTL expiration, but within grace period
           set req.http.grace = "normal (healthy server)";
           return (deliver);
       } else {
           # Hit after TTL and grace expiration
           return (fetch);
       }
   } else {
       # server is not healthy, retrieve from cache
       set req.http.grace = "unlimited (unhealthy server)";
       return (deliver);
   }
}

sub vcl_synth {
 if (resp.status == 401) {
   set resp.status = 401;
   set resp.http.WWW-Authenticate = "Basic";
   return(deliver);
 }
}

您面臨的問題是您的後端還需要Basic Authentication。當您的執行狀況檢查探針輪詢後端時，它會返回 a，HTTP/1.1 401 Unauthorized因為您沒有提供授權標頭。

我們可以通過在您的後端探測中發送自定義請求標頭來解決此問題。

這是VCL程式碼：

backend default {
   .host = "127.0.0.1";
   .port = "8080";
   .first_byte_timeout = 600s;
   .probe = {
       .request =
           "HEAD /health_check.php HTTP/1.1"
           "Authorization: Basic ZGV2OmRldg="
           "Host: localhost"
           "Connection: close"
           "User-Agent: Varnish Health Probe";
       .timeout = 2s;
       .interval = 5s;
       .window = 10;
       .threshold = 5;
  }
}

如您所見，我們正在向您的後端發送以下 HTTP 請求：

HEAD /health_check.php HTTP/1.1
Authorization: Basic ZGV2OmRldg=
Host: localhost
Connection: close
User-Agent: Varnish Health Probe

我們正在執行一個HEAD呼叫而不是一個GET，因為我們不關心有效負載，我們只關心狀態碼。

我還假設Basic ZGV2OmRldg=您的後端需要正確的授權值。

我所做的最後一個假設是您的後端將成功響應具有Host: localhost標頭的請求。

有關與您的案例匹配的教程，請參閱https://www.varnish-software.com/developers/tutorials/vcl-backend-probe-basic-authentication/。

引用自：https://serverfault.com/questions/1079210

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