Rails Nginx config can not reach root url - ruby-on-rails

Question

Here is my nginx config
server {
listen 80;
server_name localhost;
root /home/user/app/public;
try_files $uri/index.html $uri #app;
location #app {
proxy_pass http://app;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
}
error_page 500 502 503 504 /500.html;
client_max_body_size 4G;
keepalive_timeout 10;
}
Let's say my public ip: 111.111.111.111
When I try to enter the site 111.111.111.111/path, it works fine but when I try to enter only the root url 111.111.111.111 it gives me the "Welcome to nginx" message. I looked at the nginx log, but there is nothing about the root url.
I m also using unicorn, but I do not think there was a problem about that, I assume I ve added the necessary part of config here.

Answer 1

I think it might be missing the unicorn .sock file: see example nginx/unicorn/rails config here: https://www.digitalocean.com/community/tutorials/how-to-deploy-a-rails-app-with-unicorn-and-nginx-on-ubuntu-14-04
You're referencing an upstream in your proxy_pass line but it's not defined. Try adding this to the top:
upstream app {
# Path to Unicorn SOCK file
server unix:/path/to/your/app/shared/sockets/unicorn.sock fail_timeout=0;
}
I just looked at an app i did a while ago with rails, unicorn and nginx, and my entry for this was
server unix:/tmp/.sock fail_timeout=0;
It just depends how your unicorn is configured, as to where the sock file lives, so you'll need to tweak it to point to the right place.