[Rails-deploy] nginx location+proxy_pass in front of multiple mongrel_clusters?

[digitalronin]

Hi All

I'm trying to move a bunch of rails apps from an apache/fastcgi
platform to nginx/mongrel_cluster.

What I want is something like this;

    http://my.server/app1 --> mongrel_cluster1

    http://my.server/app2 --> mongrel_cluster2

I can do this in nginx with something like this;
    ...
    upstream mongrel_cluster1 {
      server 127.0.0.1:3001;
      server 127.0.0.1:3002;
    }

    upstream mongrel_cluster2 {
      server 127.0.0.1:4001;
      server 127.0.0.1:4002;
    }

  server {
    ...
    location /app1 {
      proxy_pass http://mongrel_cluster1;
      break;
    }

    location /app2 {
      proxy_pass http://mongrel_cluster2;
      break;
    }

   ...

But, the problem is that I'm now hitting my rails apps with paths like
this;

    /app1/controller/method

    /app2/controller/method

So, I want to use something like this to remove the 'app1' part;

   rewrite  ^/app1/(.*)$  /$1  permanent;

But, that seems to override the proxy_pass directive, because if I put
that in my location blocks, I just get 404 errors, and it's not
allowed in my upstream blocks.

I know I could use virtual hosts, with a different subdomain for each
app, but that would be this;

    http://app1.my.server --> mongrel_cluster1

    http://app2.my.server --> mongrel_cluster2

...which is not what I want.

Is there any way to achieve what I want, using nginx?

Thanks in advance for any help.

David


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