pfSense haproxy - Proxy to subdirectory

#1

I’m in the process of moving from nginx as a reverse proxy to haproxy (one less VM to worry about…).

I want to proxy to a specific URL, not just the server.

In nginx, all I have to do is with nginx is:

location / {
		include proxy_params;
		proxy_pass http://internal_server/subdirectory/;
		allow all;
	}

But, after a weekend of Google University :wink: I still cannot figure out how to do it with haproxy. Does it go in the frontend or backend? I assume that it would be part of the ACL and Actions but everyone knows what assumes means.

Thanks!

#2

HAProxy examines the front end and uses the ACL to match the back end destination.

#3

Thanks @LTS_Tom - I watched the video twice. The multiple servers is working. What I am trying to do is have www.site.org actually point to www.internal.lan/subsite. It isn’t a 301 redirect (e.g. I don’t want www.site.org to become www.site.org/subsite - I can get that to work). Rather, I want redirection to be right to the subsite like I have done with nginx.

#4

Did you ever figure this out?

I am trying to do something similar. I want to expose my Apache Guacamole server, but not the tomcat server it runs on.

Right now I have guac.mydomain.com getting me to the Apache Tomcat management page. This is not desired.
guac.mydomain.com/guacamole will get me to the Guacamole login screen as desired. This is good, but I do not want to expose the Apache Tomcat management page.

In nginx, I would just do the proxypass as you show in your original post, but I do not understand HAProxy well enough to make it behave similarly.

#5

No luck despite lots of research via Google University, reading the haproxy docs and many trials using a VM.

I find it strange that you can easily do this using Apache HTTPD or nginx but does not seem possible to do so using haproxy…

#6

I am still hunting for an answer too.

You mentioned that you are able to do a redirect from www.site.org to www.site.org/subsite. How did you do that? I think that would be a sufficient work around for me right now, but I get ERR_TOO_MANY_REDIRECTS every time I try that.

#7

I too am looking for a solution to this. It is stupid simple in NGINX with proxy_pass to whatever internal URL string you want. But HAProxy seems to be only capable of IP:Port.

#8

I haven’t looked in a very long time - in short, I gave up. This should be something simple to implement - Apache HTTPD and NGINX is so easy :cry:

#9

Has anyone been able to solve this? I am looking to do my setup with a bunch of subfolders and am just running into some issues. Any help would be greatly appreciated!

#10

Sorry - I gave up. It should be so simple to do but no joy…

#12

I gave up as well and am just going to use subdomains.

#13

Found this thread as I was looking for a way to accomplish this myself. This exact case is actually described in the documentation. What you’re after is called a path replace, which is one of the actions you can perform with an http request. See the links for details.

TL;DR

  # Add the following to either the frontend or backend to replace the url path
  # The example below prefixes the destination path with /foo
  # prefix /foo : turn /bar?q=1 into /foo/bar?q=1 :
  http-request replace-path (.*) /foo\1