nginx not serving JS, CSS files for PHP app behind ingress-nginx

Question

Can't seem to get this working and need help on where I am going wrong.

Have an old PHP app subpathed at /admin. ingress-nginx forwards the traffic for it to an nginx server running in the Pod. I've verified I can do the following and it serves the assets correctly:

• kubectl port-forward <admin-pod> 4000:4000
• skaffold dev --port-forward
• docker run -p 4000:4000 <image>

However, when I try to connect to access it through browser via the minikube ip, 192.168.64.5/admin for example, I just get the following:

It displays the HTML, but none of the assets are loading because they aren't being found and I'm not sure why.

This is the nginx default.conf that serves the PHP application. I'd like to fix it in here, if possible, as opposed to in the ingress.yaml because they tends to mess with my other routes and took me a bit of time to get those working properly.

Here is what I have for those files:

# default.conf

server {
  listen 4000;
  # rewrite ^([^.]*[^/])$ $1/ permanent;
  root   /usr/share/nginx/html/src;

  include /etc/nginx/default.d/*.conf;

  index app.php index.php index.html index.htm;

  client_max_body_size 500m;

  location / {
    try_files $uri $uri/ /index.php$is_args$args;
  }

  location ~ [^/]\.php(/|$) {
    fastcgi_split_path_info ^(.+?\.php)(/.*)$;
    # Mitigate https://httpoxy.org/ vulnerabilities
    fastcgi_param HTTP_PROXY "";
    fastcgi_pass 127.0.0.1:9000;
    fastcgi_index index.php;
    include fastcgi.conf;
  }
}

# ingress.yaml

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.ingress.kubernetes.io/proxy-body-size: "0"
    nginx.org/client-max-body-size: "500m"
  name: ingress-service-dev
  namespace: default
spec:
  rules:
    - http:
        paths:
          - path: /adminv2/
            backend:
              serviceName: admin-new-cluster-ip-service-dev
              servicePort: 4001
          - path: /admin/
            backend:
              serviceName: admin-old-cluster-ip-service-dev
              servicePort: 4000  
          - path: /api/
            backend:
              serviceName: api-cluster-ip-service-dev
              servicePort: 5000
          - path: /
            backend:
              serviceName: client-cluster-ip-service-dev
              servicePort: 3000

# Dockerfile

FROM php:7.3-fpm

# PHP_CPPFLAGS are used by the docker-php-ext-* scripts
ENV PHP_CPPFLAGS="$PHP_CPPFLAGS -std=c++11"

RUN apt-get update \
    && apt-get install -y nginx \ 
    && apt-get install -y libpq-dev zlib1g-dev libzip-dev \
    && docker-php-ext-install pgsql zip mbstring opcache 
RUN { \
        echo 'opcache.memory_consumption=128'; \
        echo 'opcache.interned_strings_buffer=8'; \
        echo 'opcache.max_accelerated_files=4000'; \
        echo 'opcache.revalidate_freq=2'; \
        echo 'opcache.fast_shutdown=1'; \
        echo 'opcache.enable_cli=1'; \
    } > /usr/local/etc/php/conf.d/php-opocache-cfg.ini

COPY . /usr/share/nginx/html
COPY --from=composer:latest /usr/bin/composer /usr/local/bin/composer
COPY ./conf/default.conf /etc/nginx/conf.d/default.conf
COPY ./conf/entrypoint.sh /etc/entrypoint.sh

WORKDIR /usr/share/nginx/html/src

RUN composer install
# COPY --chown=www-data:www-data . /app/src

RUN mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"
RUN mv "/usr/share/nginx/html/conf/file_size.ini" "$PHP_INI_DIR/conf.d/"

# EXPOSE 4000

ENTRYPOINT ["sh", "/etc/entrypoint.sh"]

# project structure

app-root/
  admin-new/
  admin-old/
    conf/
      company.conf
    src/
      css/
      js/
      Templates/
        index.tbs
      index.php
    Dockerfile.dev
  api/
  client/
  manifests/

# docker structure

/app
  conf/
    company.conf
  src/
    css/
    js/
    Templates/
      index.tbs
    index.php
  Dockerfile.dev

Thanks for the help.

Answer 1

Managed to get all routes working by moving this path to a separate ingress config. Probably not ideal, but I just need it working until it is replaced in hopefully 6 months.

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.ingress.kubernetes.io/proxy-body-size: "0"
    nginx.org/client-max-body-size: "500m"
    nginx.ingress.kubernetes.io/rewrite-target: /$1
    nginx.ingress.kubernetes.io/configuration-snippet: |
      rewrite ^(/admin)$ $1/ permanent;
  name: ingress-service-dev-admin
  namespace: default
spec:
  rules:
    - http:
        paths:
          - path: /admin/?(.*)
            backend:
              serviceName: admin-old-cluster-ip-service-dev
              servicePort: 4000  
---
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.ingress.kubernetes.io/configuration-snippet: |
      rewrite ^(/new-admin)$ $1/ permanent;
  name: ingress-service-dev
  namespace: default
spec:
  rules:
    - http:
        paths:
          - path: /new-admin/
            backend:
              serviceName: admin-new-cluster-ip-service-dev
              servicePort: 4001
          - path: /api/
            backend:
              serviceName: api-cluster-ip-service-dev
              servicePort: 5000
          - path: /
            backend:
              serviceName: client-cluster-ip-service-dev
              servicePort: 3000