nginx url rewrite for reverse proxy - nginx

Question

I have an nginx on port 80 and a tomcat on port 8080 configured as upstream.
The war application in tomcat listen to /pwm.
I would like to configure nginx to a reverse proxy for tomcat and rewrite the url "/" to "/pwm".
example:
user types "web.noc.local" in browser and nginx rewrites the url to web.noc.local/pwm and redirects to tomcat on port 8080.
my nginx config:
upstream pwm_server {
server 127.0.0.1:8080 fail_timeout=0;
}
server {
listen 80;
server_name web.noc.local;
access_log /var/log/nginx/log/web.noc.local.access.log main;
error_log /var/log/nginx/log/web.noc.local.error.log;
location / {
if ($is_args != "") {
rewrite "^$" /pwm break;
expires 7d;
proxy_pass http://pwm_server;
}
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_max_temp_file_size 0;
proxy_buffering off;
proxy_connect_timeout 30;
proxy_send_timeout 30;
proxy_read_timeout 30;
proxy_pass http://pwm_server;
}
}
now when I open the url the, nothing happens, only a blank screen.
thx for help.

Answer 1

Ok, I found a solution for me:
location / {
rewrite ^ http://web.noc.local/pwm/ last;
}
location /pwm {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_max_temp_file_size 0;
proxy_buffering off;
proxy_connect_timeout 30;
proxy_send_timeout 30;
proxy_read_timeout 30;
proxy_pass http://pwm_server;
}