PHP extensions not installed / loaded / enabled, using the official PHP docker image - php

Question

I've been trying all day long to install some PHP extensions into a custom made docker image (based on the official php:7.1.21-fpm-alpine3.8 image), but without success. I really don't know what I'm doing wrong as I was able to do the same thing in the past.
When I run docker-compose up, it seems that the images (php-fpm, nginx and mysql) are built correctly and that 3 docker containers are running.
However, when I check my phpinfo file, I can see that the extensions aren't loaded. (pdo_mysql, zip, imap and xdebug)
When I go into the php-fpm container and check the /usr/local/etc/php/conf.d directory I can see the ini files for all these extensions:
docker-php-ext-imap.ini
docker-php-ext-pdo_mysql.ini
docker-php-ext-xdebug.ini
docker-php-ext-zip.ini
my-firm.ini
The phpinfo also informs me that "Scan this dir for additional .ini files" is empty (no value)
app.dockerfile:
FROM php:7.1.21-fpm-alpine3.8
# Clean & update package manager
RUN rm -rf /var/cache/apk/* && \
rm -rf /tmp/*
RUN apk update
# Install tools
RUN apk add --no-cache ${PHPIZE_DEPS} \
imap-dev \
openssl-dev \
zlib-dev
# Install PHP extensions
RUN docker-php-ext-install pdo pdo_mysql zip
RUN docker-php-ext-configure imap --with-imap --with-imap-ssl \
&& docker-php-ext-install imap
RUN pecl install xdebug \
&& docker-php-ext-enable xdebug
# Copy configuration file(s)
COPY php-ini/my-firm.ini /usr/local/etc/php/conf.d/my-firm.ini
# Set workdir
WORKDIR /var/www
docker-compose.yml file:
version: '3'
services:
api-lumen-app:
build:
context: ./api-lumen
dockerfile: app.dockerfile
# name our image
image: my-firm/api-lumen-app-development
# set working dir
working_dir: /var/www
# bound volume for easy file sharing between host & docker container
volumes:
- ../api-lumen/:/var/www
env_file:
- .env
links:
- api-database
# can be used as DNS name to access another (external) service
container_name: api-lumen.app.my-firm.local
# environment variables
environment:
# Application
APP_ENV: ${APP_ENV}
APP_KEY: ${APP_KEY_LUMEN}
APP_DEBUG: ${APP_DEBUG}
APP_URL: ${APP_URL_LUMEN}
# Database
DB_HOST: ${DB_HOST}
DB_DATABASE: ${DB_DATABASE}
DB_USERNAME: ${DB_USERNAME}
DB_PASSWORD: ${DB_PASSWORD}
# Caching
CACHE_DRIVER: ${CACHE_DRIVER}
# Queue
QUEUE_DRIVER: ${QUEUE_DRIVER}
# Mail general
MAIL_DRIVER: ${MAIL_DRIVER}
MAIL_ENCRYPTION: ""
MAIL_FROM_ADDRESS: ""
MAIL_FROM_NAME: ""
MAIL_HOST: ""
MAIL_PORT: ""
MAIL_USERNAME: ""
MAIL_PASSWORD: ""
# Imap
IMAP_USERNAME: ${IMAP_USERNAME}
IMAP_PASSWORD: ${IMAP_PASSWORD}
IMAP_HOST: ${IMAP_HOST}
IMAP_PORT: ${IMAP_PORT}
IMAP_ENABLE_SSL: ${IMAP_ENABLE_SSL}
IMAP_VALIDATE_CERTIFICATE: ${IMAP_VALIDATE_CERTIFICATE}
IMAP_FOLDER: ${IMAP_FOLDER}
# Mail generator
MAILGENERATOR_BASE_URI: ${MAILGENERATOR_BASE_URI}
# Exact
EXACT_BASE_URI: ${EXACT_BASE_URI}
EXACT_DIVISION: ${EXACT_DIVISION}
EXACT_CLIENT_ID: ${EXACT_CLIENT_ID}
EXACT_CLIENT_SECRET: ${EXACT_CLIENT_SECRET}
# Google
GOOGLE_MAPS_BASE_URI: ${GOOGLE_MAPS_BASE_URI}
GOOGLE_MAPS_API_KEY: ${GOOGLE_MAPS_API_KEY}
GOOGLE_MAIL_BASE_URI: ${GOOGLE_MAIL_BASE_URI}
GOOGLE_MAIL_APPLICATION_NAME: ${GOOGLE_MAIL_APPLICATION_NAME}
GOOGLE_MAIL_AUTH_CONFIG: ${GOOGLE_MAIL_AUTH_CONFIG}
GOOGLE_MAIL_ACCESS_TYPE: ${GOOGLE_MAIL_ACCESS_TYPE}
GOOGLE_MAIL_PROMPT: ${GOOGLE_MAIL_PROMPT}
# The API (Lumen) Web Server
api-lumen-web:
build:
context: ./api-lumen
dockerfile: web.dockerfile
# name our image
image: my-firm/api-lumen-web-development
# set working dir
working_dir: /var/www
# bound volume for easy file sharing between host & docker container
volumes:
- ../api-lumen/:/var/www
ports:
- 8003:80
links:
- api-lumen-app
# can be used as DNS name to access another (external) service
container_name: api-lumen.web.my-firm.local
# The API Database
api-database:
# official (public) image
image: mysql:5.6.41
# named volume for persistent storage
volumes:
- dbdata:/var/lib/mysql
env_file:
- .env
ports:
- 3306:3306
# can be used as DNS name to access another (external) service
container_name: api.database.my-firm.local
# environment variables
environment:
MYSQL_DATABASE: ${MYSQL_DATABASE}
MYSQL_USER: ${MYSQL_USER}
MYSQL_PASSWORD: ${MYSQL_PASSWORD}
MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
# named volumes
volumes:
dbdata:
See my next post in this question for the docker-compose log, as body is limited to 30 000 chars
EDIT:
What makes it even stranger is that I've created an additional service in my docker-compose file with a dockerfile that looks more or less the same. When I check the phpinfo file for that new service, it does load the pdo_mysql?!
app.dockerfile (new service):
FROM php:7.1.21-fpm-alpine3.8
# Clean & update package manager
RUN rm -rf /var/cache/apk/* && \
rm -rf /tmp/*
RUN apk update
# Install tools
RUN apk add --no-cache ${PHPIZE_DEPS}
# Install PHP extensions
RUN docker-php-ext-install pdo pdo_mysql
RUN pecl install xdebug \
&& docker-php-ext-enable xdebug
# Copy configuration file(s)
COPY php-ini/my-firm.ini /usr/local/etc/php/conf.d/my-firm.ini
# Set workdir
WORKDIR /var/www

Answer 1

I've found the issue: I am loading an .env file in my docker-compose.yml file and the values in that .env file contained double-quotes. Removing the quotes fixed the issue.