How configure nginx for rails app as subdomain? - ruby-on-rails

Question

I developed rails app and it's working on domain mpm.head-system.com
On my VPS the app is located in /home/mobile_market path.
This is nginx.conf:
user www-data;
worker_processes 4;
pid /var/run/nginx.pid;
events { worker_connections 1024; }
http {
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
server_tokens off;
server_names_hash_bucket_size 64;
# server_name_in_redirect off;
include /etc/nginx/mime.types;
default_type application/octet-stream;
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
gzip on;
gzip_disable "msie6";
gzip_types text/plain text/xml text/css text/comma-separated-values;
upstream app_server {
server 127.0.0.1:8080 fail_timeout=0;
}
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}
This is sites-enabled/default config:
server {
listen 80;
root /home/mobile_market/public/;
server_name mpm.head-system.com;
index index.htm index.html;
location / {
try_files $uri/index.html $uri.html $uri #app;
}
location ~* ^.+\.(jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|mp3|flv|mpeg|avi)$ {
try_files $uri #app;
}
location #app {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://app_server;
}
}
Everything works fine, and now I have a new rails app (redmine) on the same VPS.
Now I setup redmine on the same VPS and it works on the 3000 port - mpm.head-system.com:3000
How can I change nginx.conf to setup my redmine app on subdomain like - redmine.head-system.com ?
How connect application, which running on other port, as subdomain? (because in /etc/hosts I can set IP without port only).
I know that I need to use proxy_pass and virtual host, but I don't know how :(
Please, help...

Answer 1

Add new confing file to /etc/nginx/sites-enabled: redmine.config
server {
listen 80;
root /home/redmine/;
server_name redmine.head-system.com;
index index.htm index.html;
location / {
try_files $uri/index.html $uri.html $uri #app;
}
location ~* ^.+\.(jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|mp3|flv|mpeg|avi)$ {
try_files $uri #app;
}
location #app {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://localhost:3000;
}
}