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Re: Switching backends based on a cookie

January 28, 2010 07:57PM
merlin corey Wrote:
-------------------------------------------------------
> On Thu, Jan 28, 2010 at 4:03 PM, Marcus Clyne
> wrote:
> > Hi,
> >
> > saltyflorida wrote:
> >>
> >> Is it possible to switch backend clusters of
> servers based on a cookie?
> >>
> >> I would like to set a cookie named "env" and do
> something like this:
> >>
> >>        if ($http_cookie ~*
> "env=testing(;|$)") {
> >>            proxy_pass
> http://backend_testing;
> >>        }
> >>        if ($http_cookie ~*
> "env=staging(;|$)") {
> >>            proxy_pass
> http://backend_staging;
> >>        }
> >>        if ($http_cookie ~*
> "env=production(;|$)") {
> >>            proxy_pass
> http://backend_production;
> >>        }
> >>
> >> However the "proxy_pass" directive is not
> allowed inside an "if". Is there
> >> another way I can approach this?
> >>
> >>
> >
> > Take a look at the map module :
> >
> > http://wiki.nginx.org/NginxHttpMapModule
> >
> > One possibility would be :
> >
> > http {
> >
> > map  $cookie_env  $backend {
> >
> >   testing      http://backend_testing;
> >   staging      http://backend_staging;
> >   production   http://backend_production;
> > }
> >
> > server {
> >   ...
> >   proxy_pass   $backend;
> >
> > }
> >
> > }
> >
> > Marcus.
> >
> >
> > _______________________________________________
> > nginx mailing list
> > nginx@nginx.org
> > http://nginx.org/mailman/listinfo/nginx
> >
>
> Marcus' solution should be just fine, but I feel I
> must ask an
> important question:
>
> Doesn't it make more sense to have production,
> static, and dev as
> separate server blocks entirely with their own
> hostnames? This is, at
> the least, traditional :).
>
> -- Merlin
>
> _______________________________________________
> nginx mailing list
> nginx@nginx.org
> http://nginx.org/mailman/listinfo/nginx

Marcus,
Thank you for the quick response. I will try the map module.
I forgot to mention that I am using caching with the HTTP Proxy module and that I only want to cache responses from the production servers. When I have the cookie set to "testing" or "staging", I'd like to bypass the cache and talk directly to the backend. Does this sound feasible?

Merlin,
I realize this setup is unorthodox. We are using Wordpress MU and it generates different pages based on the domain name. We are serving many domains with one server cluster and wanted to be able to test using the production domain names.

Thanks,
Eliot
Subject Author Posted

Switching backends based on a cookie

saltyflorida January 28, 2010 06:43PM

Re: Switching backends based on a cookie

Eugaia January 28, 2010 07:06PM

Re: Switching backends based on a cookie

merlin corey January 28, 2010 07:28PM

Re: Switching backends based on a cookie

merlin corey January 28, 2010 07:30PM

Re: Switching backends based on a cookie

saltyflorida January 28, 2010 09:01PM

Re: Switching backends based on a cookie

Eugaia January 28, 2010 07:54PM

Re: Switching backends based on a cookie

merlin corey January 29, 2010 12:44PM

Re: Switching backends based on a cookie

saltyflorida January 28, 2010 07:57PM

Re: Switching backends based on a cookie

Eugaia January 28, 2010 09:54PM

Re: Switching backends based on a cookie

saltyflorida January 29, 2010 02:05AM

Re: Switching backends based on a cookie

saltyflorida January 29, 2010 02:13AM

Re: Switching backends based on a cookie

Eugaia January 29, 2010 05:58AM

Re: Switching backends based on a cookie

saltyflorida February 03, 2010 12:31AM

Re: Switching backends based on a cookie

saltyflorida January 28, 2010 08:51PM

Re: Switching backends based on a cookie

Piotr Sikora January 28, 2010 09:10PM

Re: Switching backends based on a cookie

saltyflorida January 28, 2010 09:18PM

Re: Switching backends based on a cookie

Piotr Sikora January 28, 2010 09:20PM

Re: Switching backends based on a cookie

Laurence Rowe January 29, 2010 02:24PM

Re: Switching backends based on a cookie

Eugaia January 29, 2010 06:04PM

Re: Switching backends based on a cookie

Laurence Rowe January 30, 2010 01:50PM

Re: Switching backends based on a cookie

Eugaia January 30, 2010 07:04PM



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