Failure to run behind Nginx

Help
1

Environment

Ubuntu 21.04 hirsute, Nginx 1.21.1, Netdata v1.31.0-132-nightly

Problem/Question

I suspect this is a problem stemming from my own inexperience with nginx but i followed the steps in Running Netdata behind Nginx | Learn Netdata about running netdata in a subfolder behind an existing host but i keep getting errors like this in developer console
image
or this
image.psd
image.psd(1)

my nginx configuration file for netdata is stored in /etc/nginx/sites-available/DOMAIN and is this:

upstream netdata {
    server 127.0.0.1:19999;
    keepalive 64;
}

server {
    listen 80;
    # uncomment the line if you want nginx to listen on IPv6 address
    #listen [::]:80;

    # the virtual host name of this subfolder should be exposed
    #server_name netdata.example.com;

    location = /netdata {
        return 301 /netdata/;
    }

    location ~ /netdata/(?<ndpath>.*) {
        proxy_redirect off;
        proxy_set_header Host $host;

        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_http_version 1.1;
        proxy_pass_request_headers on;
        proxy_set_header Connection "keep-alive";
        proxy_store off;
        proxy_pass http://netdata/$ndpath$is_args$args;

        gzip on;
        gzip_proxied any;
        gzip_types *;
    }
}

Will provide more details as needed

2

Hi, not an Nginx specialist, just copying the location I used on one of my servers. It worked for me.

location /netdata/ {
  rewrite ^/netdata(/.*)$ $1 break;
  proxy_pass http://localhost:19999;
}
3

Ok, I tested our documentation config. Works without problems (http://HOSTNAME/netdata).

[ilyam@pc nginx]$ nginx -v
nginx version: nginx/1.20.1

[ilyam@pc nginx]$ grep -v "#" nginx.conf | grep -v -e '^$'
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    upstream netdata {
        server 127.0.0.1:19999;
        keepalive 64;
    }
    server {
        listen       80;
        server_name  localhost;
        location / {
            root   /usr/share/nginx/html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }
        location = /netdata {
            return 301 /netdata/;
        }
        location ~ /netdata/(?<ndpath>.*) {
            proxy_redirect off;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-Host $host;
            proxy_set_header X-Forwarded-Server $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_http_version 1.1;
            proxy_pass_request_headers on;
            proxy_set_header Connection "keep-alive";
            proxy_store off;
            proxy_pass http://netdata/$ndpath$is_args$args;
            gzip on;
            gzip_proxied any;
            gzip_types *;
        }
    }
}

0 ~ $ curl http://pc/netdata/api/v1/info
{
	"version": "v1.31.0-132-g6a201507a",
	"uid": "f2538ada-e937-11eb-9bb6-4cedfb3652ae",
	"mirrored_hosts": [
		"pc"
	],
	"mirrored_hosts_status": [
		{ "guid": "f2538ada-e937-11eb-9bb6-4cedfb3652ae", "reachable": true, "hops": 0, "claim_id": null }
	],
	"alarms": {
		"normal": 0,
		"warning": 1,
		"critical": 0
	},
	"os_name": "Manjaro Linux",
...
4

Thank you!

I will be testing this out in a bit. Though I did try your location configuration on my DOMAIN sites-available config which led me to a 404 page which makes me think I did something wrong in the initial setup.

5

So after completely reinstalling nginx and resetting all its configs to default and basically copy pasting the nginx conf you provided. It finally worked.

Now to test slowly.

Update:
After using certbot to install the ssl certificate. It then returned a 404 error.

6

I think i have found the problem.

I don’t exactly know how nginx does ssl certificates but this code only seems to work on one server block and cannot work on the rest.

    listen [::]:443 ssl ipv6only=on; # managed by Certbot
	listen 443 ssl; # managed by Certbot
	ssl_certificate /etc/letsencrypt/live/DOMAIN/fullchain.pem; # managed by Certbot
	ssl_certificate_key /etc/letsencrypt/live/DOMAIN/privkey.pem; # managed by Certbot
	include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
	ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

Unfortunately, this does make it so that the server block without this will 404 for some reason.
I do not know how this works, but for now i have disabled https to make things work