Excellent - this may be what we need Can I do further http swittching in the backend (based on hostnames) or can this only be done in the front end?
On 4 June 2010 08:56, Willy Tarreau <w...@1wt.eu> wrote: > On Wed, Jun 02, 2010 at 04:18:33PM +0100, Laurie Young wrote: > > Hi everyone > > > > I have a problem, and I'm not sure if HAProxy can solve it > > > > I have a range of different requests coming in on a server to port 80, > and > > am using HAProxy to switch them to the relevant back end servers. > > > > Most of these requests are HTTP requests and I have layer 7 mode working > > fine, doing everything i need > > > > Now I have to also send a tcp request though the same port. I need > HAProxy > > to detect if it is a tcp request, and if so route it to server 1, > otherwise > > parse the HTTP and work out which server to use based on the HTTP content > > > > Is this possible? > > Yes this is possible with version 1.4. For this you need to have a TCP > frontend and an HTTP backend. Using tcp inspection rules, you define > how long you wait for an HTTP request. If a valid HTTP request comes > in time, you switch to the HTTP backend. If none comes in time, of if > the traffic is not HTTP, then you use the TCP backend. Some people use > this to open SSH on port 80 or 443 ;-) > > However there are some drawbacks. Since the logs are defined by the > frontend, you won't benefit from HTTP logging, you'll only have TCP > logging. > > Also, if you want to try this, you should upgrade to 1.4.7 (which is > not yet released but available as a snapshot) because it fixes an > issue with the HTTP protocol detection. One field was not properly > initialized, so once HTTP was detected on a connection, it was likely > that further connections would be detected as HTTP too. > > Example of usage : > > frontend xxxx > bind :80 > mode tcp > option tcplog > tcp-request inspect-delay 5s > tcp-request content accept if HTTP > use_backend http_backend if HTTP > default_backend tcp_backend > > backend tcp_backend > # tcp-only config > > backend http_backend > # http-only config > mode http > > Regards, > Willy > > -- Dr Laurie Young Scrum Master New Bamboo Follow me on twitter: @wildfalcon Follow us on twitter: @newbamboo Creating fresh, flexible and fast-growing web applications is our passion. 3rd Floor, Gensurco House, 46A Rosebery Avenue, London, EC1R 4RP http://www.new-bamboo.co.uk
