Ping uma porta específica

Question

JJandke

Asked: 2024-04-08 18:31:31 +0800 CST2024-04-08 18:31:31 +0800 CST 2024-04-08 18:31:31 +0800 CST

nginx prox_pass: a porta 3000 é redirecionada para 80. A mesma configuração com outras portas funciona

772

Eu tenho o seguinte cenário:

Serviço A

O serviço A está disponível em host:8080.

Eu configurei um proxy reverso no nginx para servicea.domainresolver host:8080.

Aqui está meu arquivo de configuração (Local: /etc/nginx/sites-available/servicea )


server {
    listen 80;
    listen [::]:80;

    server_name servicea.domain.com;

    location / {
        proxy_pass http://host:8080/admin/;
        include proxy_params;

    proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $server_name;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 90;
        proxy_set_header X-Forwarded-Proto $scheme;

    set $xforwardedssl "off";
    if ($scheme = https) {
            set $xforwardedssl "on";
    }
    }
}

Serviço B

Gostaria de fazer o mesmo com o Serviço B (Grafana) . Isso pode ser alcançado em host:3000. Meu nginx-config em /etc/nginx/sites-available/serviceb se parece com isto:


server {
    listen 80;
    listen [::]:80;

    server_name serviceb.domain.com;

    location / {
        proxy_pass http://host:3000/;
        include proxy_params;

    proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $server_name;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 90;
        proxy_set_header X-Forwarded-Proto $scheme;

    set $xforwardedssl "off";
    if ($scheme = https) {
            set $xforwardedssl "on";
    }
    }
}

Ambos os arquivos estão vinculados simbolicamente a /etc/nginx/sites-enabled/ .
O Nginx inicia com sucesso e não reclama.
Tudo funciona ao ligar servicea.domain.
Ao ligar, serviceb.domainrecebo um código de erro 400 no navegador.

Quando uso o wget para carregar a página, vejo que na verdade ela não resolve para Host:3000, mas para Host:80.


╰─$ wget serviceb.domain.com
Will not apply HSTS. The HSTS database must be a regular and non-world-writable file.
ERROR: could not open HSTS store at '/home/config/.wget-hsts'. HSTS will be disabled.
--2024-04-08 12:17:00--  http://serviceb.domain.com/
Resolving serviceb.domain.com (serviceb.domain.com)... 10.25.25.34
Connecting to serviceb.domain.com (serviceb.domain.com)|10.25.25.34|:80... connected.
HTTP request sent, awaiting response... 400 Bad Request
2024-04-08 12:17:03 ERROR 400: Bad Request.

Por que é que? Eu tenho a mesma configuração 1:1? Uma pequena prova de que a configuração é a mesma. Aqui está a saída do diff:


╰─$ diff serviceb servicea
5c5
<     server_name servicea.domain.com;
---
>     server_name serviceb.domain.com;
8c8
<         proxy_pass http://host:8080/admin/;
---
>         proxy_pass http://host:3000/;

Alguém pode me dar uma dica de onde posso encontrar configurações que substituem meu proxy reverso ou que afetem a resolução de nomes? Deixe-me saber se precisar de mais informações.

Agradeço antecipadamente!

1 respostas

Voted

JJandke · Answer 1 · 2024-04-10T18:00:04+08:00

Deixa para lá. Os problemas foram resolvidos.

Alguns esclarecimentos aqui:

A porta 80 no comando wget era simplesmente a porta solicitada no proxy reverso, e é assim que deveria ser.
Havia algo errado com os arquivos de configuração. No entanto, muita coisa mudou nesse meio tempo.

Aqui está a configuração atual que usamos, para quem chegou até aqui pela internet.

serviço-a


#########################################################################################
# Service A --> /etc/nginx/conf.d/service-a.conf

server {
  server_name service-a.domain.tld;
    location / {
        proxy_pass http://host-a:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $server_name;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 90;
        proxy_set_header X-Forwarded-Proto $scheme;
        set $xforwardedssl "off";
        if ($scheme = https) {
            set $xforwardedssl "on";
         }
        proxy_set_header X-Forwarded-Ssl $xforwardedssl;
    }

    listen [::]:443 ssl; 
    listen 443 ssl; 
    ssl_certificate /etc/letsencrypt/live/domain.tld/fullchain.pem; 
    ssl_certificate_key /etc/letsencrypt/live/domain.tld/privkey.pem; 
    include /etc/letsencrypt/options-ssl-nginx.conf; 
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; 


}
server {
    if ($host = service-a.domain.tld:8080) {
        return 301 https://$host$request_uri;
    } 


  listen 80;
  listen [::]:80;
  server_name service-a.domain.tld;
    return 404; 
}

serviço-b (Grafana)


#########################################################################################
# Service B (Grafana) /etc/nginx/conf.d/service-b.conf

server {
  server_name service-b.domain.tld;
    location / {
        proxy_pass http://host-a:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $server_name;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 90;
        proxy_set_header X-Forwarded-Proto $scheme;
        set $xforwardedssl "off";
        if ($scheme = https) {
            set $xforwardedssl "on";
         }
        proxy_set_header X-Forwarded-Ssl $xforwardedssl;
    }

    listen [::]:443 ssl; 
    listen 443 ssl; 
    ssl_certificate /etc/letsencrypt/live/domain.tld/fullchain.pem; 
    ssl_certificate_key /etc/letsencrypt/live/domain.tld/privkey.pem; 
    include /etc/letsencrypt/options-ssl-nginx.conf; 
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; 


}
server {
    if ($host = service-b.domain.tld:3000) {
        return 301 https://$host$request_uri;
    } 


  listen 80;
  listen [::]:80;
  server_name service-b.domain.tld;
    return 404; 
}

e aqui as partes alteradas em /etc/grafana/grafana.ini:


#################################### Server ####################################
[server]
# Protocol (http, https, h2, socket)
protocol = https

# The ip address to bind to, empty will bind to all interfaces
http_addr =

# The http port  to use
http_port = 3000

# The public facing domain name used to access grafana from a browser
domain = domain.tld

# Redirect to correct domain if host header does not match domain
# Prevents DNS rebinding attacks
enforce_domain = false

# The full public facing url you use in browser, used for redirects and emails
# If you use reverse proxy and sub path specify full url (with sub path)
;root_url = %(protocol)s://%(domain)s:%(http_port)s/
root_url = https://subdomain.domain.tld:3000


# https certs & key file
cert_file = /etc/grafana/grafana.crt
cert_key = /etc/grafana/grafana.key