We have a situation where we have one JBoss application that is being proxied by two Apache paths as a Virtual Host below:
<VirtualHost *:80>
ServerName localhost1
ProxyPass /abba/ http://localhost:8080/app/
ProxyPass /babba/ http://localhost:8080/app/
ProxyPassReverse /abba/ http://localhost:8080/app/
ProxyPassReverse /babba/ http://localhost:8080/app/
</VirtualHost>
The routing of /abba/ and /babba/ need to go to the same application - going forward we are using rewrites to add some parameters that the application uses to configure itself based on whether /abba/ or /babba/.
However when the application sends a redirect the ProxyPassReverse does not work as access sayfrom /babba/ gets redirected to /abba/.
I understand the reason as it's the same application - however is there are way of configuring Apache to support two difference routes (ProxyPass and ReverseProxyPass) to the same application.
Many Thanks
Have you tried duplicating the VirtualHost and changing the duplicate to server name "localhost2"?
Related
Recently, I was in need of using both Apache and Tomcat together in which Apache was to be used as the reverse proxy to forward requests to port 80 to localhost:8080 which I did like this:
<VirtualHost *:*>
ProxyPass / http://localhost:8080/app/
</VirtualHost>
And it works perfectly well.
Now, what I need to do is: I have Tomcat listening and serving on another port 8082. I need to be able to access it using www.mydomain.com:8082. I tried:
<VirtualHost *:8082>
ProxyPass / http://localhost:8082/app/
</VirtualHost>
But no luck. And I can't listen on 8082 because Tomcat is doing that.
What you have above is a (failed) attempt to map the / URL space into two different places. That's never going to work.
When proxying to Tomcat, it's never a good idea to rewrite URL paths (e.g. / -> /app/ because Tomcat is going to get all kinds of confused. It's much better to map individual applications:
<VirtualHost *:*>
ProxyPass /app1/ http://localhost:8080/app1/
ProxyPass /app2/ http://localhost:8080/app2/
ProxyPass /app3/ http://localhost:8082/app3/
ProxyPass /app4/ http://localhost:8082/app4/
# If you need a fall-back application for `/`, just map it last.
ProxyPass / http://localhost:8080/
</VirtualHost>
Note that the last line up there is mapping / to Tomcat's ROOT context (mounted on /'). Don't do this any other way, or you'll spend years trying to make everything work when you could have just done it the recommended way.
I have a host with a single web app and at the moment I am accessing it via www.hostnameA.com/ as the web app is deployed to tomcat/webapps as the tomcat ROOT web app.
Now I need to add another web app to my host and I also want this one to have no context either but will access it via another hostname www.hostnameB.com/ but I can only deploy one ROOT tomcat web app.
I should have added that I am using apache as well and my virtual host looks like:
<VirtualHost *:80>
ServerName www.hostnameA.com
ProxyRequests Off
ProxyPreserveHost On
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
ProxyPass / http://localhost:8080/
ProxyPassReverse / http://localhost:8080/
</VirtualHost>
I tried renaming the war file to webAppA and then appending that to the proxypass but it gave me a 400 error and kept appending /webAppA to the URL:
ProxyPass / http://localhost:8080/webAppA
Is there a solution to this? I dont really want to run multiple instances of tomcat on different ports just for this, is there another option?
As discussed above, most straightforward solution would be to use Apache's mod_proxy_ajp, allowing proxying and AJP forwarding at the same time. Configuration should look something like:
<VirtualHost *:80>
ServerName www.hostnameA.com
ProxyPass / ajp://localhost:8009/webAppA/
ProxyPassReverse / http://www.hostnameA.com/webAppA
[...]
...and same with B for www.hostnameB.com.
What I'm basically trying to accomplish is having my main website running a CMS written in Go. This will be located at www.example.com.
I also have applications written in PHP located in directories, such as www.example.com/clients/
How can I serve example.com/clients using Apache/PHP while serving example.com using Go built-in web server?
Via mod_proxy in Apache2, you can proxy different paths into different destinations at localhost or anywhere else accessible by your server, including within your local network (if your server can access it).
For this you would use ProxyPass (Apache2 Docs for ProxyPass, which is very useful reading) like the example below:
<VirtualHost *:80>
ServerName some.example.host.xyz
DocumentRoot /var/www/your-document-root
Alias /clients/ /var/www/clients/
ProxyPass /clients/ !
ScriptAlias /something-using-cgi/ /var/www/cgi-stuff/
ProxyPass /something-using-cgi/ !
ProxyPreserveHost On
ProxyPass / http://localhost:9876/
ProxyPassReverse / http://localhost:9876/
ProxyPass /elsewhere/ http://elsewhere.example.host.xyz:1234/
ProxyPassReverse /elsewhere/ http://elsewhere.example.host.xyz:1234/
</VirtualHost>
You'll want to be sure that you set your proxy security such that external users can't use your reverse proxy as a forward proxy, too. You can do that via ProxyRequests as described in the official Apache2 docs. The way I did this on a server is to put this in your server-wide config (you should verify on your own that this is secure enough):
# disables forward proxy
ProxyRequests Off
Andrew Gerrand has a good blog post about this for nginx but the principle is the same for Apache.
You want to set up Apache as a reverse proxy for requests coming in for the Go application.
For Apache you want to look at mod_proxy
Using apache2 I want to set up an AJP proxy for a Tomcat server that maps an internal servlet URL to a completely different URL externally. Currently I am using the following configurations:
Apache2 configuration:
<IfModule mod_proxy.c>
ProxyPreserveHost on
ProxyPass /external_name ajp://192.168.1.30:8009/servlet_name
ProxyPassReverse /external_name ajp://192.168.1.30:8009/servlet_name
</IfModule>
Note that external_name and servlet_name are different.
Tomcat 6 configuration:
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
This however does not work. Apache seems to forward http requests to Tomcat.
However the URLs and redirects returned by Tomcat are still using the original servlet_name and Apache does not map them to external_name.
Is this possible at all with AJP? If not can it be done using a plain http proxy instead?
Mapping different names between Apache and Tomcat can be quite tricky and depends much on how the web application builds its urls for the response.
Basically your setup is correct, but if your application uses its own servlet_name for redirects and urls ProxyPassReverse won't map them.
If you need this kind of setup have a look at mod_proxy_html (Apache 3rd party module) which will parse and rewrite also the contents, not only the url and response headers as mod_proxy.
( A late answer, but I just ran into this problem myself. )
It appears that ProxyPassReverse using ajp: doesn't work because the headers returned from a redirect don't have an ajp: URL in Location:, they have a http: URL. ProxyPassReverse just causes a rewrite of matching headers, and
that string doesn't match what's being returned.
This should work (provided the Location: field uses that numerical address
and not a host name.)
ProxyPreserveHost on
ProxyPass /external_name ajp://192.168.1.30:8009/servlet_name
ProxyPassReverse /external_name http://192.168.1.30/servlet_name
( You can use 'curl -I' to inspect the redirect headers and debug. )
See this note, or a more involved solution here using mod_proxy_html
for rewriting the URLs in web pages as well.
Additionally to the answer from Steven D. Majewski there is one more problem. If the target application uses the request host name to create a redirect (302 Moved Temporarily), it won't work with multiple host names. One must create multiple configurations for every name, like this:
ProxyPassReverse /external_name http://server.com/servlet_name
ProxyPassReverse /external_name http://server.org/servlet_name
ProxyPassReverse /external_name http://server.co.uk/servlet_name
Actually the ProxyPreserveHost on must solve this issue and replace the HOST header in the incoming requests with the address or IP specified in ProxyPass. Unfortunately it seems to be the ProxyPreserveHost doesn't work with ajp connectors. The tomcat in my configuration still received the host name got from browser instead replacing it with 192.168.1.30. As result the browser based redirects still didn't work for every name.
Following configuration didn't work as well :-(
# NOT WORKING !!!
ProxyPassReverse /external_name http://%{HTTP_HOST}/servlet_name
The workaround was using http instead of ajp.
ProxyPreserveHost on
ProxyPass /external_name ajp://192.168.1.30:8009/servlet_name
ProxyPassReverse /external_name http://192.168.1.30/servlet_name
Did somebody investigate it deeply?
For me, this seemed to cause problems:
ProxyPreserveHost on
ProxyPass /external_name ajp://192.168.1.30:8009/servlet_name
ProxyPassReverse /external_name http://192.168.1.30/servlet_name
While this seemed to work:
ProxyPreserveHost on
ProxyPass /external_name ajp://192.168.1.30:8009/servlet_name
ProxyPassReverse /external_name ajp://192.168.1.30:8009/servlet_name
I don't know why but it just did.
I currently have a tomcat servlet 1 running under the ROOT:
api1.myhost.com:8080/
I'm using mod_proxy and simply forwarding all requests from
api1.myhost.com to this instance. This is working as of today.
I now have installed a second servlet 2 which runs under the same instance of tomcat (same IP address):
www.myhost.com:8080/servlet2
I want all requests to a new URL api2 to go to that second servlet such that:
api2.myhost.com
now gets forwarded to the second servlet instance.
I've created an A record such that api2.myhost.com points to my server IP. How do you make api2.myhost.com forward to www.myhost.com:8080/servlet2 ?
You need to make two VirtualHost's with on pointing to the first webapp, the other to the second.
<VirtualHost *:80>
ServerName api1.myhost.com
ProxyPass / http://api1.myhost.com:8080/
ProxyPassReverse / http://api1.myhost.com:8080/
</VirtualHost>
<VirtualHost *:80>
ServerName api2.myhost.com
ProxyPass / http://www.myhost.com:8080/servlet2
ProxyPassReverse / http://www.myhost.com:8080/servlet2
</VirtualHost>
Note that since the path will be different on tomcat than on apache, you will need to use relative URLs in your application.