HAproxy not working: Newbies first mistakes?

From: Mads Johansen <mjo#travelmarket.com>
Date: Thu, 19 Jun 2008 10:30:10 +0200

Hello there.

The idea is this: Get a reverse proxy sat up in America to send traffic to our main website. So all it needs to do is this:

Client <-> HAproxy <-> Backend

How do I make that happen with the least configuration?

What I have done so far:
Installed Ubuntu 8.04
Apt-get update/upgrade
Apt-get install haproxy (gives me version 1.3.12 2007/06/17): The installer made a new user and a new user group (both named haproxy) Edited the /etc/haproxy.cfg: Commented out everything that I didn't think I should use:

So I'm down to this
Global:

Maxconn        16384
User               haproxy
Group             haproxy

Defaults
log                 global
mode             tcp
maxconn        4000

listen              HOSTNAME    0.0.0.0:80 (To make it listen to all interfaces on port 80)
balance          roundrobin (kind of useless as it's only sending the traffic on to one server (which does load balancing on to other servers. And no, that cannot be changed)
server             SERVERNAME x.x.x.x:80 (Do I need to have a weight on this?)
option            httpclose (Useful in tcp mode? OR should I make it http mode and that way throw KeepAlive away?)

The problem then (assuming nothing is wrong with my logic in putting this together) is that I can't get any response from the backend server.

To debug I've started haproxy with this command (as per recommended by people on IRC): haproxy -f /etc/haproxy.cfg -d Available polling systems :

     select : pref=150,  test result OK
     sepoll : disabled,  test result OK
      epoll : disabled,  test result OK
       poll : disabled,  test result OK

Total: 4 (1 usable), will use select.
Using select() as the polling mechanism.

00000001:HOSTNAME.accept(0003)=0005 from [MY.IP.x.x:58789]
00000001:HOSTNAME.srvcls[0005:ffff]
00000001:HOSTNAME.clicls[0005:ffff]
00000001:HOSTNAME.srvcls[0005:ffff]
00000001:HOSTNAME.closed[0005:ffff]

What I get in the client is this:

10:09:51.168[251ms][total 297ms] Status: 200[OK] GET http://IP.OF.WEB.SERVER/ Load Flags[VALIDATE_ALWAYS LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Content Size[-1] Mime Type[application/x-unknown-content-type]

   Request Headers:

      Host[IP.OF.WEB.SERVER]
      User-Agent[Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14]
      Accept[text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5]
      Accept-Language[en-us,en;q=0.5]
      Accept-Encoding[gzip,deflate]
      Accept-Charset[ISO-8859-1,utf-8;q=0.7,*;q=0.7]
      Keep-Alive[300]
      Connection[keep-alive]
      Cache-Control[max-age=0]

   Response Headers:
Status=OK - 200

Which means: It only gets the OK header, not the actual content.

So, any ideas?

Best regards

Mads Johansen
IT-Intern Received on 2008/06/19 10:30