Apache-2.4
僅在根 URL 上的 VHost 子目錄中安裝 Drupal 時的 Apache 重定向循環
我目前在我們的生產站點首頁上遇到問題，即 Drupal 安裝失敗並顯示“ERR_TOO_MANY_REDIRECTS”。
我們設置的一些背景知識：在我們的伺服器上，我們設置了不同的虛擬主機來執行不同的應用程序。
想法是每次安裝都將在域名的子目錄中提供服務，例如 subdomain.example.com/app1 和 subdomain.example.com/app2。
它已經執行了將近一年，突然之間，只有 Drupal 安裝的首頁開始執行重定向循環（subdomain.example.com/app）。暫存環境的設置方式完全相同，不會出現這種行為。此外，生產應用程序中的其他頁面也沒有任何問題（subdomain.example.com/app/page）。
安裝位於 /var/www/app 的伺服器上。當訪問 subdomain.example.com/app/ 時，這應該作為安裝的文件根目錄。
安裝有問題的 VHOST 如下所示：
<Directory "/var/www/app"> # # Possible values for the Options directive are "None", "All", # or any combination of: # Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews # # Note that "MultiViews" must be named *explicitly* --- "Options All" # doesn't give it to you. # # The Options directive is both complicated and important. Please see # http://httpd.apache.org/docs/2.4/mod/core.html#options # for more information. # Options Indexes FollowSymLinks # # AllowOverride controls what directives may be placed in .htaccess files. # It can be "All", "None", or any combination of the keywords: # Options FileInfo AuthConfig Limit # AllowOverride All Order allow,deny Allow from all # # Controls who can get stuff from this server. # Require all granted RewriteEngine on RewriteBase / Include /var/www/app/.htaccess </Directory> NameVirtualHost *:80 <VirtualHost *:80> ServerName subdomain.example.com ServerPath /app DocumentRoot /var/www/app </VirtualHost> # Set the Alias for the CLP installation Alias "/app/" "/var/www/app/" Alias "/app" "/var/www/app"我在每個 VHOSTS 中還有一個 .htaccess 文件來驅動重定向：
# # Apache/PHP/Drupal settings: # SetEnvIfNoCase X-Forwarded-Proto https HTTPS=on # Protect files and directories from prying eyes. <FilesMatch "\.(engine|inc|info|install|make|module|profile|test|po|sh|.*sql|theme|tpl(\.php)?|xtmpl)(~|\.sw[op]|\.bak|\.orig|\.save)?$|^(\..*|Entries.*|Repository|Root|Tag|Template|composer\.(json|lock))$|^#.*#$|\.php(~|\.sw[op]|\.bak|\.orig\.save)$"> Order allow,deny </FilesMatch> # Don't show directory listings for URLs which map to a directory. Options -Indexes # Follow symbolic links in this directory. Options +FollowSymLinks # Make Drupal handle any 404 errors. # Relative to the DocumentRoot defined in httpd.conf ErrorDocument 404 /app/index.php # Set the default handler. # Relative to the DocumentRoot defined in httpd.conf DirectoryIndex /app/index.php /app/index.html /app/index.htm # Override PHP settings that cannot be changed at runtime. See # sites/default/default.settings.php and drupal_environment_initialize() in # includes/bootstrap.inc for settings that can be changed at runtime. php_value upload_max_filesize 500M php_value post_max_size 500M php_value memory_limit 500M # PHP 5, Apache 1 and 2. <IfModule mod_php5> php_flag magic_quotes_gpc off php_flag magic_quotes_sybase off php_flag register_globals off php_flag session.auto_start off php_value mbstring.http_input pass php_value mbstring.http_output pass php_flag mbstring.encoding_translation off </IfModule> # Requires mod_expires to be enabled. <IfModule mod_expires.c> # Enable expirations. ExpiresActive On # Cache all files for 2 weeks after access (A). ExpiresDefault A1209600 <FilesMatch \.php$> # Do not allow PHP scripts to be cached unless they explicitly send cache # headers themselves. Otherwise all scripts would have to overwrite the # headers set by mod_expires if they want another caching behavior. This may # fail if an error occurs early in the bootstrap process, and it may cause # problems if a non-Drupal PHP file is installed in a subdirectory. ExpiresActive Off </FilesMatch> </IfModule> # Various rewrite rules. <IfModule mod_rewrite.c> RewriteEngine on # Set "protossl" to "s" if we were accessed via https://. This is used later # if you enable "www." stripping or enforcement, in order to ensure that # you don't bounce between http and https. RewriteRule ^ - [E=protossl] RewriteCond %{HTTPS} on RewriteRule ^ - [E=protossl:s] # Make sure Authorization HTTP header is available to PHP # even when running as CGI or FastCGI. RewriteRule ^ - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}] # Block access to "hidden" directories whose names begin with a period. This # includes directories used by version control systems such as Subversion or # Git to store control files. Files whose names begin with a period, as well # as the control files used by CVS, are protected by the FilesMatch directive # above. # # NOTE: This only works when mod_rewrite is loaded. Without mod_rewrite, it is # not possible to block access to entire directories from .htaccess, because # <DirectoryMatch> is not allowed here. # # If you do not have mod_rewrite installed, you should remove these # directories from your webroot or otherwise protect them from being # downloaded. RewriteRule "/\.|^\.(?!well-known/)" - [F] # If your site can be accessed both with and without the 'www.' prefix, you # can use one of the following settings to redirect users to your preferred # URL, either WITH or WITHOUT the 'www.' prefix. Choose ONLY one option: # # To redirect all users to access the site WITH the 'www.' prefix, # (http://example.com/... will be redirected to http://www.example.com/...) # uncomment the following: # RewriteCond %{HTTP_HOST} . # RewriteCond %{HTTP_HOST} !^www\. [NC] # RewriteRule ^ http%{ENV:protossl}://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301] # # To redirect all users to access the site WITHOUT the 'www.' prefix, # (http://www.example.com/... will be redirected to http://example.com/...) # uncomment the following: # RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC] # RewriteRule ^ http%{ENV:protossl}://%1%{REQUEST_URI} [L,R=301] # Modify the RewriteBase if you are using Drupal in a subdirectory or in a # VirtualDocumentRoot and the rewrite rules are not working properly. # For example if your site is at http://example.com/drupal uncomment and # modify the following line: RewriteBase /app/ # # If your site is running in a VirtualDocumentRoot at http://example.com/, # uncomment the following line: #RewriteBase / # Pass all requests not referring directly to files in the filesystem to # index.php. Clean URLs are handled in drupal_environment_initialize(). RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_URI} !=/favicon.ico RewriteRule ^ index.php [L] # Rules to correctly serve gzip compressed CSS and JS files. # Requires both mod_rewrite and mod_headers to be enabled. <IfModule mod_headers.c> # Serve gzip compressed CSS files if they exist and the client accepts gzip. RewriteCond %{HTTP:Accept-encoding} gzip RewriteCond %{REQUEST_FILENAME}\.gz -s RewriteRule ^(.*)\.css $1\.css\.gz [QSA] # Serve gzip compressed JS files if they exist and the client accepts gzip. RewriteCond %{HTTP:Accept-encoding} gzip RewriteCond %{REQUEST_FILENAME}\.gz -s RewriteRule ^(.*)\.js $1\.js\.gz [QSA] # Serve correct content types, and prevent mod_deflate double gzip. RewriteRule \.css\.gz$ - [T=text/css,E=no-gzip:1] RewriteRule \.js\.gz$ - [T=text/javascript,E=no-gzip:1] <FilesMatch "(\.js\.gz|\.css\.gz)$"> # Serve correct encoding type. Header set Content-Encoding gzip # Force proxies to cache gzipped & non-gzipped css/js files separately. Header append Vary Accept-Encoding </FilesMatch> </IfModule> RedirectMatch ^(.*)/app/course-page/CP([0-9]*)$ $1/app/course-page/$2 RedirectMatch ^(.*)/app/ramping-site/RS([0-9]*)$ $1/app/ramping-site/$2 RedirectMatch ^(.*)/app/content/BCTID([0-9]*)$ $1/app/content/$2 </IfModule> # Add headers to all responses. <IfModule mod_headers.c> # Disable content sniffing, since it's an attack vector. Header always set X-Content-Type-Options nosniff </IfModule>服務中斷了兩天，我無法找到解決方案。
謝謝大家的意見。結果證明是虛擬機上的一個損壞的文件最終導致它崩潰。仍然不確定那是什麼。
如果我能夠弄清楚到底是什麼被破壞了，我會把它放在這里以供參考。
但是，在崩潰之前，Apache (HTTPD) 停止在瀏覽器中執行 PHP 7.0。它會在 CLI 中執行 PHP 腳本，但只會在 Web 瀏覽器中顯示 PHP 文本。幾個小時後，伺服器崩潰了。