PHP 8.0 - Apache - phpMyAdmin - Docker Image - php

Question

I am creating an image for a php8 project run on apache, and work with phpMyAdmin, I have my Dockerfile as follow :
FROM php:8.0-apache
RUN apt-get update -y && apt-get install -y libmariadb-dev && docker-php-ext-install mysqli && docker-php-ext-install pdo_mysql
WORKDIR /var/www/html
And my docker-compose.yml as follow :
services:
php-apache-environment:
container_name: php-apache
image: php:8.0-apache
volumes:
- ./php/src:/var/www/html/
ports:
- 8000:80
db:
container_name: db
image: mysql:latest
restart: always
environment:
MYSQL_ROOT_PASSWORD: MYSQL_ROOT_PASSWORD
MYSQL_DATABASE: MY_DATABASE
MYSQL_USER: MYSQL_USER
MYSQL_PASSWORD: MYSQL_PASSWORD
ports:
- "9906:3306"
phpmyadmin:
image: phpmyadmin:latest
ports:
- '8080:80'
restart: always
environment:
PMA_HOST: db
depends_on:
- db
For me, all is good, but when I run "docker compose up --build", container is launched, but he has not install "mysqli" and "pdo_mysql" like I request in the Dockerfile.
But, if I log in by CLI to the PHP container, and that I run docker-php-ext-install mysqli and docker-php-ext-install pdo_mysql, it works, and I just have to restart the PHP container.
But, I dont know why, I can't install it from the start ?
Thank you for your help.

Answer 1

Thans to Lety comment, we juste need to change the line 4 of docker-compose.yml
by :
build: ./php
(to indicate the directory where the Dockerfile is) and it works.
Resume :
Dont change the Dockerfile
. Change the docker-compose.yml by :
version: '3.8'
services:
php-apache-environment:
container_name: php-apache
build: ./php
volumes:
- ./php/src:/var/www/html/
ports:
- 8000:80
db:
container_name: db
image: mysql:latest
restart: always
environment:
MYSQL_ROOT_PASSWORD: MYSQL_ROOT_PASSWORD
MYSQL_DATABASE: MY_DATABASE
MYSQL_USER: MYSQL_USER
MYSQL_PASSWORD: MYSQL_PASSWORD
ports:
- "9906:3306"
phpmyadmin:
image: phpmyadmin:latest
ports:
- '8080:80'
restart: always
environment:
PMA_HOST: db
depends_on:
- db