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ワニスがキャッシュしないのはなぜですか？

UbuntuサーバーでのVarnish 3.xのセットアップのトラブルシューティングを行っています。私は、名前付きベースのvhostを介して、ボックスに設定された2つのサイトでDrupal 7を実行しています。VarnishにDrupal IキャッシュからVarnishをPNGに取得しようとしています。

PNGファイルのcurl -Iリクエストから取得したヘッダーは次のとおりです。

HTTP/1.1 200 OK
Server: Apache/2.2.22 (Ubuntu)
Last-Modified: Sun, 07 Oct 2012 21:18:59 GMT
ETag: "a57c2-3850-4cb7ea73db6c0"
Accept-Ranges: bytes
Content-Length: 14416
Cache-Control: max-age=1209600
Expires: Thu, 25 Oct 2012 22:55:14 GMT
Content-Type: image/png
Accept-Ranges: bytes
Date: Thu, 11 Oct 2012 22:55:14 GMT
X-Varnish: 1766703058
Age: 0
Via: 1.1 varnish
Connection: keep-alive
X-Varnish-Cache: MISS

これは同じファイルのヘッダーですが、ワニス（ポート8080）をバイパスしています。

HTTP/1.1 200 OK
Date: Sat, 13 Oct 2012 13:16:17 GMT
Server: Apache/2.2.22 (Ubuntu)
Last-Modified: Sun, 07 Oct 2012 21:18:59 GMT
ETag: "a57c2-3850-4cb7ea73db6c0"
Accept-Ranges: bytes
Content-Length: 14416
Cache-Control: max-age=1209600
Expires: Sat, 27 Oct 2012 13:16:17 GMT
Content-Type: image/png

これが私が使用しているVarnishVCLファイルです（これはDrupal用に設計されたデフォルトのVCL構成です）：

# Default backend definition.  Set this to point to your content
# server.
#
backend default {
  .Host = "127.0.0.1";
  .port = "8080";
}

# Respond to incoming requests.
sub vcl_recv {
  # Use anonymous, cached pages if all backends are down.
  if (!req.backend.healthy) {
    unset req.http.Cookie;
  }

  # Allow the backend to serve up stale content if it is responding slowly.
  set req.grace = 6h;

  # Pipe these paths directly to Apache for streaming.
  #if (req.url ~ "^/admin/content/backup_migrate/export") {
  #  return (pipe);
  #}

  # Do not cache these paths.
  if (req.url ~ "^/status\.php$" ||
      req.url ~ "^/update\.php$" ||
      req.url ~ "^/admin$" ||
      req.url ~ "^/admin/.*$" ||
      req.url ~ "^/flag/.*$" ||
      req.url ~ "^.*/ajax/.*$" ||
      req.url ~ "^.*/ahah/.*$") {
       return (pass);
  }

  # Do not allow outside access to cron.php or install.php.
  #if (req.url ~ "^/(cron|install)\.php$" && !client.ip ~ internal) {
    # Have Varnish throw the error directly.
  #  error 404 "Page not found.";
    # Use a custom error page that you've defined in Drupal at the path "404".
    # set req.url = "/404";
  #}

  # Always cache the following file types for all users. This list of extensions
  # appears twice, once here and again in vcl_fetch so make sure you edit both
  # and keep them equal.
  if (req.url ~ "(?i)\.(pdf|asc|dat|txt|doc|xls|ppt|tgz|csv|png|gif|jpeg|jpg|ico|swf|css|js)(\?.*)?$") {
    unset req.http.Cookie;
  }

  # Remove all cookies that Drupal doesn't need to know about. We explicitly 
  # list the ones that Drupal does need, the SESS and NO_CACHE. If, after 
  # running this code we find that either of these two cookies remains, we 
  # will pass as the page cannot be cached.
  if (req.http.Cookie) {
    # 1. Append a semi-colon to the front of the cookie string.
    # 2. Remove all spaces that appear after semi-colons.
    # 3. Match the cookies we want to keep, adding the space we removed 
    #    previously back. (\1) is first matching group in the regsuball.
    # 4. Remove all other cookies, identifying them by the fact that they have
    #    no space after the preceding semi-colon.
    # 5. Remove all spaces and semi-colons from the beginning and end of the 
    #    cookie string. 
    set req.http.Cookie = ";" + req.http.Cookie;
    set req.http.Cookie = regsuball(req.http.Cookie, "; +", ";");    
    set req.http.Cookie = regsuball(req.http.Cookie, ";(SESS[a-z0-9]+|SSESS[a-z0-9]+|NO_CACHE)=", "; \1=");
    set req.http.Cookie = regsuball(req.http.Cookie, ";[^ ][^;]*", "");
    set req.http.Cookie = regsuball(req.http.Cookie, "^[; ]+|[; ]+$", "");

    if (req.http.Cookie == "") {
      # If there are no remaining cookies, remove the cookie header. If there
      # aren't any cookie headers, Varnish's default behavior will be to cache
      # the page.
      unset req.http.Cookie;
    }
    else {
      # If there is any cookies left (a session or NO_CACHE cookie), do not
      # cache the page. Pass it on to Apache directly.
      return (pass);
    }
  }
}

# Set a header to track a cache HIT/MISS.
sub vcl_deliver {
  if (obj.hits > 0) {
    set resp.http.X-Varnish-Cache = "HIT";
  }
  else {
    set resp.http.X-Varnish-Cache = "MISS";
  }
}

# Code determining what to do when serving items from the Apache servers.
# beresp == Back-end response from the web server.
sub vcl_fetch {
  # We need this to cache 404s, 301s, 500s. Otherwise, depending on backend but 
  # definitely in Drupal's case these responses are not cacheable by default.
  if (beresp.status == 404 || beresp.status == 301 || beresp.status == 500) {
    set beresp.ttl = 10m;
  }

  # Don't allow static files to set cookies. 
  # (?i) denotes case insensitive in PCRE (Perl compatible regular expressions).
  # This list of extensions appears twice, once here and again in vcl_recv so 
  # make sure you edit both and keep them equal.
  if (req.url ~ "(?i)\.(pdf|asc|dat|txt|doc|xls|ppt|tgz|csv|png|gif|jpeg|jpg|ico|swf|css|js)(\?.*)?$") {
    unset beresp.http.set-cookie;
  }

  # Allow items to be stale if needed.
  set beresp.grace = 6h;
}

# In the event of an error, show friendlier messages.
sub vcl_error {
  # Redirect to some other URL in the case of a homepage failure.
  #if (req.url ~ "^/?$") {
  #  set obj.status = 302;
  #  set obj.http.Location = "http://backup.example.com/";
  #}

  # Otherwise redirect to the homepage, which will likely be in the cache.
  set obj.http.Content-Type = "text/html; charset=utf-8";
  synthetic {"
<html>
<head>
  <title>Page Unavailable</title>
  <style>
    body { background: #303030; text-align: center; color: white; }
    #page { border: 1px solid #CCC; width: 500px; margin: 100px auto 0; padding: 30px; background: #323232; }
    a, a:link, a:visited { color: #CCC; }
    .error { color: #222; }
  </style>
</head>
<body onload="setTimeout(function() { window.location = '/' }, 5000)">
  <div id="page">
    <h1 class="title">Page Unavailable</h1>
    <p>The page you requested is temporarily unavailable.</p>
    <p>We're redirecting you to the <a href="/">homepage</a> in 5 seconds.</p>
    <div class="error">(Error "} + obj.status + " " + obj.response + {")</div>
  </div>
</body>
</html>
"};
  return (deliver);
}

毎回MISSと0歳になります。私が正しく理解している場合、これはファイルがVarnishのキャッシュから返されていないことを意味します。ワニスの設定に問題はありますか？

更新：

提案したように、基本的なVCLファイルから始めましたが、それでも毎回失敗します。 VCL構成は次のとおりです。

# Default backend definition.  Set this to point to your content
# server.
#
backend default {
  .Host = "127.0.0.1";
  .port = "8080";
}

# Respond to incoming requests.
sub vcl_recv {
  unset req.http.Cookie;
}

# Set a header to track a cache HIT/MISS.
sub vcl_deliver {
  if (obj.hits > 0) {
    set resp.http.X-Varnish-Cache = "HIT";
  }
  else {
    set resp.http.X-Varnish-Cache = "MISS";
  }
}

# Code determining what to do when serving items from the Apache servers.
# beresp == Back-end response from the web server.
sub vcl_fetch {
  unset beresp.http.set-cookie;
}

トラブルシューティングを続けています。

apache-2.2cachevarnishdrupaldrupal7
3
Justin

それは私が見逃したとは信じられないほど単純なものになりました。私はサイトでApacheBasic Authorizationを使用していましたが、VarnishはAuthorizationヘッダーを見るとデフォルトでパスを返すようです。

4
Justin

drupal virtualhostを担当するhttpd.confに次の行を含める必要があります。

Header unset ETag

また、移動/使用することをお勧めします： Varnish HTTP Accelerator Integration | drupal.org

0
alexus