nginx subdomain failure with Rails app and passenger - ruby-on-rails

Question

I am totally new to nginx deployment and having problem setting up the subdomain for rails app which is running in passenger. My app structure is like this
-- sss.com (parent domain)
-- sub.sss.com (subdomain)
-- zzz.com (which will be redirected to sub.sss.com)
For more clear perspective, think of the gmail structure
-- google.com (parent domain)
- mail.google.com (subdomain)
-- gmail.com (which will be redirected to mail.google.com)
And remember sub.sss.com is not just a directory under sss, its completely a different rails app.
To setup a similar structure i have configured nginx like this
server {
listen 80;
server_name sss.com *.sss.com;
rewrite ^(.*) http://sss.com$1 permanent;
}
server {
listen 80;
server_name sss.com;
passenger_enabled on;
access_log logs/sss.log;
error_log logs/sss_error.log;
root /var/www/sss/public;
}
server {
listen 80;
server_name sub.sss.com;
passenger_enabled on;
access_log logs/sub.log;
error_log logs/sub_error.log;
root /var/www/sub/public;
}
server {
listen 80;
server_name zzz.com;
rewrite ^(.*) http://sub.sss.com$1 permanent;
}
When i start nginx i got this warning message
nginx: [warn] conflicting server name "sss.com" on 0.0.0.0:80, ignored
And got this message when tried to access the url www.sss.com
Chrome - Error 310 (net::ERR_TOO_MANY_REDIRECTS): There were too many redirects.
FF - Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
But when i access zzz.com, it successfully redirects to sub.sss.com with a same error.
Seems its messed up in some kind of loop. anybody got a idea how to solve this?

Answer 1

In your first server you define the sss.com like server in the second too. You just need delete from first. like that :
server {
listen 80;
server_name *.sss.com;
rewrite ^(.*) http://sss.com$1 permanent;
}
server {
listen 80;
server_name sss.com;
passenger_enabled on;
access_log logs/sss.log;
error_log logs/sss_error.log;
root /var/www/sss/public;
}
server {
listen 80;
server_name sub.sss.com;
passenger_enabled on;
access_log logs/sub.log;
error_log logs/sub_error.log;
root /var/www/sub/public;
}
server {
listen 80;
server_name zzz.com;
rewrite ^(.*) http://sub.sss.com$1 permanent;
}

Answer 2

You have 3 domains/subdamians and there should be only 3 server blocks instead of the four you had.
Try ...
server {
# This server block serves sss.com
listen 80;
server_name sss.com;
passenger_enabled on;
access_log logs/sss.log;
error_log logs/sss_error.log;
root /var/www/sss/public;
}
server {
# This server block serves sub.sss.com
listen 80;
server_name sub.sss.com;
passenger_enabled on;
access_log logs/sub.log;
error_log logs/sub_error.log;
root /var/www/sub/public;
}
server {
# This server block redirects zzz.com to sub.sss.com
listen 80;
server_name zzz.com;
rewrite ^ http://sub.sss.com$request_uri? permanent;
}