How to roll back to PHP version 8.1: Docker phpdockerio/php:8.1-fpm build uses PHP version 8.2
I'm running my project on a PHP-FPM docker container (config file details below). When I build the container and try to run Composer, I get an error reporting that the PHP extension is missing. However, I think my build file covers these extensions (see docker/php-fpm/Dockerfile below).
It turns out that the container was built with php8.2 as the default version. I've been able to change the symlink to set the default version back to php8.1 but this doesn't seem to be the right solution. Can anyone suggest a better solution?
How do I know the container is running 8.2:
Inside the container I run php --version and get:
root@fee8cc9ff790:/application# php --version PHP 8.2.0 (cli) (built: Dec 8 2022 13:56:08) (NTS)
Then which php gave me:
root@fee8cc9ff790:/application# which php /usr/bin/php
I followed the symlink to the PHP binary linked in /etc/alternatives:
phar -> /usr/bin/phar8.2 phar.phar -> /usr/bin/phar.phar8.2 php -> /usr/bin/php8.2 phpdbg -> /usr/bin/phpdbg8.2
This doesn't seem right to me. I was able to relink them to their 8.1 versions and everything seems to be running fine now, but what happens when I rebuild the container?
My file details:
docker-compose.yml
###############################################################################
# Generated on docker.io #
###############################################################################
version: '3.9'
services:
mailhog:
image: 'mailhog/mailhog:latest'
redis:
image: 'redis:alpine'
mysql:
image: 'mysql:8.0.27'
working_dir: /application
platform: linux/amd64
environment:
- MYSQL_ROOT_PASSWORD=
- MYSQL_DATABASE=
- MYSQL_USER=
- MYSQL_PASSWORD=
webserver:
image: 'nginx:alpine'
working_dir: /application
volumes:
- '.:/application'
- './docker/nginx/nginx.conf:/etc/nginx/conf.d/default.conf'
php-fpm:
build: docker/php-fpm
working_dir: /application/
volumes:
- '.:/application'
- './docker/php-fpm/php-ini-overrides.ini:/etc/php/8.1/fpm/conf.d/99-overrides.ini'
- './docker/php-fpm/php-ini-overrides.ini:/etc/php/8.1/cli/conf.d/99-overrides.ini'
docker-compose.override.yml
###############################################################################
# Generated on phpdocker.io #
###############################################################################
version: '3.9'
services:
mailhog:
ports:
- '8026:8025'
mysql:
ports:
- '33061:3306'
webserver:
ports:
- '801:80'
docker/php-fpm/Dockerfile
FROM phpdockerio/php:8.1-fpm
WORKDIR "/application"
RUN apt-get update;
apt-get -y --no-install-recommends install
git
php-xdebug
php8.1-mysql
php8.1-sqlite
mysql-client
php8.1-redis;
apt-get clea n;
rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/doc/*
