Apache2 proxy mod_proxy error

Question

My web application is at mysite.com:8080. I want to access it by typing webapp.mysite.com.

So, I have completed the following steps:

1) Enable the necessary modules:

a2enmod proxy a2enmod proxy_http

restart apache2

2) Create / etc / apache 2 / sites-available / mysite

<VirtualHost *:80>
    ServerName webapp.mysite.com
    ProxyRequests Off
    <Proxy *>
        Order deny,allow
        Allow from all
    </Proxy>
    ProxyPass / http://mysite.com:8080/
    ProxyPassReverse /  http://mysite.com:8080/
    <Location />
        Order allow,deny
        Allow from all
    </Location>
</VirtualHost>

3) Change / etc / apache 2 / ports.conf

NameVirtualHost *:80
Listen 80

I have been using these settings for several days and everything will be fine. But after rebooting the server, in webapp.mysite.com, I got:

Proxy error

The proxy received an invalid response from the upstream server. proxy could not process request GET /.

Reason: DNS lookup error for: mysite.com

Apache / 2.2.9 (Debian) DAV / 2 SVN / 1.5.1 PHP / 5.2.6-1 + lenny4 with Suhosin-Patch mod_ssl / 2.2.9 OpenSSL / 0.9.8g mod_perl / 2.0.4 Perl / v5.10.0 Server at webapp.mysite.com Port 80

, ?

Answer 1

IP-.