[Bug]: Nginx not find services in preview deployment

[picheidt]

Error Message and Logs

I have a PHP application using nginx as a reverse proxy. I deploy it with Coolify and Docker Compose, and the main deployment works as expected. However, the preview deployment results in the following error:

error: nginx: [emerg] host not found in upstream "php_mm2" in /etc/nginx/conf.d/default.conf:16

Below are my current files

• DockerFile.nginx

FROM nginx:stable-alpine

WORKDIR /var/www/html/

COPY ./webroot /var/www/html
COPY ./docker/nginx/default.conf /etc/nginx/conf.d/default.conf

EXPOSE 80/tcp

• nginx.conf

server {
    listen 80;
    index index.php index.html;
    server_name localhost;
    error_log /var/log/nginx/error.log;
    access_log /var/log/nginx/access.log;
    root /var/www/html;

    location / {
    	try_files $uri $uri/ /index.php?$query_string;
    }

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ˆ(.+\.php)(/.+)$;
        fastcgi_pass php_mm2:9000;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
}

• docker-compose

services:
  nginx_mm2:
    build:
      context: .
      dockerfile: Dockerfile.nginx.staging
    container_name: nginx_mm2
    ports:
      - "80"
    depends_on:
      - php_mm2
    healthcheck:
      test: [ "CMD", "curl", "-f", "http://localhost:80/app/healthCheck" ]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 15s
  
  php_mm2:
    build:
      context: .
      dockerfile: Dockerfile.staging
    container_name: php_mm2
    command: sh ./run_dependencies_staging.sh
    ports:
      - "9000"

Steps to Reproduce

1. Active preview deployment
2. Use docker-compose with an application and nginx containers
3. Open a PR to trigger the preview Deployment

Example Repository URL

No response

Coolify Version

v4.0.0-beta.338

Are you using Coolify Cloud?

No (self-hosted)

Operating System and Version (self-hosted)

Ubuntu 22.04.4 LTS

Additional Information

The application and nginx containers are on the same network. I couldn’t debug nginx because it keeps restarting in a loop due to the error.

I think the reason is that during the preview deployment, the service name is changed with the addition of pr-{prId}.