Access index.php from docker - php

Question

I've created a docker with a database and a php server but I'm failing accessing the php file from the server.
For testing purpose I'm currently having 2 index.php in my test app ./index.php and ./app/index.php
This is my docker-compose.yml
version: '3'
services:
symfony:
build:
context: .
dockerfile: docker/Dockerfile
image: project-manager
ports:
- 80:80
db:
image: mysql
ports:
- 3306:3306
volumes:
- "./.data/db:/var/lib/mysql"
environment:
MYSQL_ROOT_PASSWORD: root
phpmyadmin:
image: phpmyadmin/phpmyadmin
ports:
- "8080:80"
links:
- db
This is the php dockerfile
FROM php:7.4-fpm
# Install Composer
COPY --from=composer /usr/bin/composer /usr/bin/composer
# Copy all our files in the docker root
COPY . /
docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f80a16af8336 project-manager "docker-php-entrypoi…" About a minute ago Up About a minute 0.0.0.0:80->80/tcp, 9000/tcp project-manager_symfony_1
d97688010adf phpmyadmin/phpmyadmin "/docker-entrypoint.…" 9 minutes ago Up 9 minutes 0.0.0.0:8080->80/tcp project-manager_phpmyadmin_1
55781c004031 mysql "docker-entrypoint.s…" 9 minutes ago Up 9 minutes 0.0.0.0:3306->3306/tcp, 33060/tcp project-manager_db_1
In my /etc/hosts
#Project Manager
127.0.0.1 project-manager.local
I can successfully access to the phpmyadmin using project-manager.local:8080
But if I try the simple project-manager.local/ or project-manager.local/index
I've got an empty response.

Answer 1

Root cause:
For symfony, you bind 80:80, this means you suppose there is a port 80 open in the php container. But, you use php:7.4-fpm which will just open port 9000.
(If you install net-tools in the container & use netstat -oanltp to check, there won't be 80 port open.)
Solutions:
Option 1:
If you insist to use php-fpm, then you need another web server container to pass the 80 request to php container's 9000 port. Maybe could add a more service with nginx container, and refers to connecting-nginx-to-php-fpm to set your configure for nginx container:
fastcgi_pass symfony:9000;
Option 2:
Switch to use php:7.4-apache, which defaults has a web server in the image open the 80 port, like next:
Dockerfile:
FROM php:7.4-apache
COPY . /var/www/html
index.php:
<?php
phpinfo();
NOTE: you should copy files to /var/www/html.
In a word, you should assure the container which you expose 80:80 really have a port 80 open in the container, otherwise, your expose is useless...