docker + php-fpm:+ ngnix 502 Bad Gateway nginx/1.23.2 - php

Question

Hi im trying to lunch multiple project with my docker-compose each image was created by me from scratch FROM debian:11 my react and express runing perfectly but i don't know why ngnix and symfony can't connect to each other if someone know what is the problem i get a 502 Bad Gateway
nginx/1.23.2 and i don't have any error message when i build with my docker compose in the terminal.
Dockerfile -
app/symfony/Dockerfile
FROM debian:11
RUN apt update && \
apt upgrade -y && \
apt install dirmngr ca-certificates software-properties-common gnupg gnupg2 apt-transport-https curl librabbitmq-dev -y && \
curl -sSL https://packages.sury.org/php/README.txt | bash -x && \
apt update && \
apt upgrade -y && \
apt install php8.1 \
php8.1-fpm \
php8.1-mysql \
php8.1-pdo \
php8.1-gd \
php8.1-cli \
php8.1-dom \
php8.1-mbstring \
php8.1-simplexml \
php8.1-phar \
php8.1-dev \
php8.1-amqp \
php8.1-redis \
unzip \
wget \
git -y && \
mkdir /run/php
WORKDIR /var/www/symfony
RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" && \
php composer-setup.php && \
php -r "unlink('composer-setup.php');" && \
mv composer.phar /usr/local/bin/composer
RUN curl -1sLf 'https://dl.cloudsmith.io/public/symfony/stable/setup.deb.sh' | bash &&\
apt install symfony-cli
COPY composer.json composer.lock symfony.lock ./
COPY . .
RUN composer install
CMD ["php-fpm8.1", "-F"]
EXPOSE 9000
docker-compose of my project -
version: "3.8"
services:
nginx:
restart: unless-stopped
image: nginx:latest
ports:
- 1999:80
volumes:
- ./app/symfony:/var/www/symfony
- ./conf/nginx/default.conf:/etc/nginx/conf.d/default.conf
depends_on:
- php-fpm
- db
php-fpm:
restart: always
build:
context: ./app/symfony
ports:
- 9000:9000
volumes:
- ./app/symfony:/var/www/symfony
depends_on:
- db
healthcheck:
test: [ "CMD", "php", "-v" ]
timeout: 30s
interval: 2s
retries: 30
db:
image: mysql:8
ports:
- 3306:3306
restart: always
volumes:
- ./database:/var/lib/mysql
environment:
MYSQL_ROOT_USER: root
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: docker
MYSQL_USER: user
MYSQL_PASSWORD: user_password
phpmyadmin:
image: phpmyadmin
restart: always
ports:
- 8888:80
depends_on:
- db
node_express:
image: tlugat/debian_express
build:
context: ./app/express
restart: unless-stopped
ports:
- 8081:8081
react:
image: tlugat/debian_react
build:
context: ./app/react
restart: unless-stopped
ports:
- 3000:3000
maildev:
image: maildev/maildev
ports:
- 1080:1080
.default.conf-
conf/ngnix/default.conf
server {
listen 80;
index index.php;
server_name localhost;
root /var/www/symfony/public;
error_log /var/log/nginx/project_error.log;
access_log /var/log/nginx/project_access.log;
location / {
try_files $uri /index.php$is_args$args;
}
location ~ ^/index\\.php(/|$) {
fastcgi_pass php-fpm:9000;
fastcgi_split_path_info ^(.+\\.php)(/.*)$;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
fastcgi_param DOCUMENT_ROOT $realpath_root;
fastcgi_buffer_size 128k;
fastcgi_buffers 4 256k;
fastcgi_busy_buffers_size 256k;
internal;
}
location ~ \\.php$ {
return 404;
}
}

Answer 1

I find the solution of my problem when you use docker to connect ngnix with php-fpm it's like you have vm in your vm so docker finds it, but don't know what to do when you pass him: fastcgi_pass php-fpm: 9000;
You just need to redirect ngnix to PHP-fpm like this docker understand his need to connect them together