ProxyPass worker主机名在apache2 (2.4.7 Ubuntu 14.04 LTS)中太长，如何解决

Question

我必须将apache2设置为内部AWS ELB的反向代理。ELB的URL长度为85个字符。使用虚拟主机设置它失败，因为它给出一个错误

ProxyPass worker hostname (internal-elb-greater-than-64-character-url-that-fails-in-apache-aws.amazon.com) too long. 

如果ELB URL小于或等于64个字符，则此操作非常有效。

配置看起来像这样在文件/etc/apache/sites-enabled/000-sites.conf (实际ELB和网站的名称替换)

<VirtualHost *:80>
    ProxyPreserveHost On
    ServerName www.mydomain.com
    ServerAdmin [e-mail]
    DocumentRoot /var/www/html
    RewriteEngine On
    RewriteCond %{HTTP:X-Forwarded-Proto} !https
    RewriteCond %{HTTP_USER_AGENT} !^ELB-HealthChecker.*
    RewriteRule . https://www.mydomain.com%{REQUEST_URI} [R=301,L]
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
    ProxyPass /test/ http://localhost:8080/
    ProxyPassReverse /test/ http://localhost:8080/
    ProxyPass / http://internal-elb-greater-than-64-character-url-that-fails-in-apache-aws.amazon.com/
    ProxyPassReverse / http://internal-elb-greater-than-64-character-url-that-fails-in-apache-aws.amazon.com/
</VirtualHost>

我已经能够设置相同的nginx与以下配置文件/etc/nginx/nginx.conf

server {
    listen       80;
    server_name  localhost;
    root         /usr/share/nginx/html;
    #access_log  /var/log/nginx/host.access.log  main;
    location /test/ {
            if ( $http_x_forwarded_proto != 'https' ){
                    rewrite ^ https://www.mydomain.com$request_uri? permanent;
            }
            proxy_pass http://localhost:8080/;
    }
    location / {
            if ( $http_x_forwarded_proto != 'https' ){
                    rewrite ^ https://www.mydomain.com$request_uri? permanent;
            }
            proxy_pass http://internal-elb-greater-than-64-character-url-that-fails-in-apache-aws.amazon.com/;
    }
    location /elb-status {
            return 200;
    }
    # redirect server error pages to the static page /40x.html
    #
    error_page  404              /404.html;
    location = /40x.html {
    }
    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
    }
}

Nginx工作如预期-与PING URL健康检查修改。

我想知道apache2 (2.4.7 Ubuntu 14.0 LTS)中的等效配置是什么。我在Fedora的apache2.4.9上尝试了一下，结果还是一样的。

如何让apache2工作，因为我们没有考虑nginx之前的内部负载平衡-这不是我的决定

Answer 1

您需要使用mod_rewrite:

https://issues.apache.org/bugzilla/show_bug.cgi?id=53218

关于重写:http://httpd.apache.org/docs/2.4/rewrite/

所以我的猜测(未测试):

RewriteRule ^/(.*)$ http://internal-elb-greater-than-64-character-url-that-fails-in-apache-aws.amazon.com/$1 [P]

Answer 2

如果你的url太长，请使用Alise代替，它为我工作。在mod_proxy.conf文件中:

Alise http://dummy:8009 http://yourlongoriginalurl:8009

Proxypass/http://dummy:8009