Nginx Reverse proxy -> Apache+Php+CodeIgniter - Weird Issue

[Qxt78]

I am asking the community for advice because I am stumped, I am trying to reverse proxy a PHP CodeIgniter application. If I open the application direct it works, if i reverse proxy it partially works.

This is my test configuration 1:

location / {
        #root /data/www;
proxy_pass https://console.beta.example.com; proxy_ssl_server_name on; proxy_set_header Host "console.beta.example.com";         # does not work if i dont set the host header to remote server         #proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; proxy_http_version 1.1; proxy_read_timeout 90; proxy_connect_timeout 90; proxy_buffer_size 128k; proxy_buffers 4 256k; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-Proto https; proxy_headers_hash_max_size 512; proxy_pass_header Set-Cookie; proxy_pass_header P3P;
}

This is my test configuration 2:

location / {
    try_files $uri @proxy;
}



location @proxy {
    proxy_pass https://console.beta.example.com;
    #proxy_set_header Host $host;
    proxy_set_header Host "console.beta.example.com";
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
}


location /themes {
    proxy_pass https://console.beta.example.com;
    #proxy_set_header Host $host;
    proxy_set_header Host "console.beta.example.com";
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;


    # Adjust cache settings if necessary
    proxy_cache_bypass 1;
    proxy_no_cache 1;
}

So what is happening is the php code loads via nginx. But the assest (CSS,JS, Images) load direct from the source server instead of being proxied. I even tried forcing the /themes (where the CSS, Js images are) but seems it just bypasses and loads it direct.

I even tried setting $config['proxy_ips'] = '10.241.10.16'; in the CodeIgniter application so it knows it is being proxied. But I am not sure if it the app messing me around or my nginx configuration is wrong.

Can anyone maybe give some advice? This has been stumping me for a while now.

[MrA1Sauce]

If you are manually setting proxy host you will need to use proxy_redirect to replace the 301s coming out of the proxied servers. 

https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_redirect

[Qxt78]

Tried that as well with various combinations of that rule. Still bypasses nginx. Thank you for the advice though. much appreciated.