reqrep <yoursearch> <yourstring> if { srv_id <idofyourserver> }
server's id can be forced with "id" keyword if needed Regards, Hervé. On Thu, 11 Aug 2011 13:22:36 +0300 Ran S <r...@sheinberg.net> wrote: > Well, I have no idea if this mailing list is active, as I have gotten > no response, but I'll give it another try. > > I managed to change the Host header using ReqRep successfully. > > However, now I am in a state where one of the backends need this > change, and the other one doesn't. > How would I go about configuring this? > > If I put the two backends under one backend node, they both get the > ReqRep parameter, and then one of the servers can't work with the > replaced host header. > If I put them in two backend nodes, how can I get the frontend node to > balance between the two? this appears to be the correct way but I > can't find the right command. > > Thanks > > On Wed, Aug 10, 2011 at 5:00 PM, Ran S <r...@sheinberg.net> wrote: > > > Hello all, > > > > I am trying to use HAProxy for the following configuration: > > Two Linux servers (node1, node2) running apache (on port 85) and > > squid and acting as Proxy servers to the Internet > > I installed HAProxy on node1, and configured it to listen to port > > 80, and have the backends in their respective apache port 85. > > > > While node1 is the only active server in the backend servers list, > > I can make a request to node1:80 and it will be successfully > > redirected to the apache port and returned to me. > > > > However while node2 is the only active backend server, this flow > > will fail and I will simply get a blank page with HTTP 200. > > I think I know why that is. when sniffing on node1, I can see the > > following request flow: > > > > 1. My browser making web the request to node1:80 > > 2. Node1 making the request to node2. > > But, this is where the problem comes in. > > The source IP is node1 > > The Destination IP is node2 > > However the Host in this request is the node1 IP address > > > > So, since node2 backend server is actually a proxy server, it will > > take the IP address from the Host header it received and make a > > request to node1 (since it has it in the request's Host header) and > > the failure will come in. > > > > So I guess what I'm asking is what would be the correct option to > > use in HAproxy in order to have this set up the right way. > > > > I copied the configuration file from one of the examples and > > trimmed it down to the very basic so I can eliminate anything > > that's causing the problems, so here it is: > > > > * global* > > * daemon* > > * maxconn 256* > > * > > * > > * defaults* > > * mode http* > > * timeout connect 5000ms* > > * timeout client 50000ms* > > * timeout server 50000ms* > > * balance roundrobin* > > * option forwardfor* > > * > > * > > * frontend http-in* > > * bind *:80* > > * default_backend servers* > > * > > * > > * backend servers* > > * server <node1name> <node1ip>:85* > > > > > > Many thanks in advance for any help! please let me know if you need > > any more information. > > > > Thanks, > > Ran > > > > > > -- Hervé COMMOWICK, EXOSEC (http://www.exosec.fr/) ZAC des Metz - 3 Rue du petit robinson - 78350 JOUY EN JOSAS Tel: +33 1 30 67 60 65 - Fax: +33 1 75 43 40 70 mailto:hcommow...@exosec.fr