Switching backends based on a cookie

[Marcus Clyne]

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.