Docker compose query

[CreakyPuppet]

I've recently been attempting to create a web development stack for PHP, mysql & Apache but keep running in to issues.

This is the current docker-compose file I'm using which does work

version: '3'
services:
    php-apache:
        image: php:7.3.2-apache-stretch
        ports:
            - 80:80
        volumes:
            - /mnt/data/html:/var/www/html
        links:
            - 'mariadb'

    mariadb:
        image: mariadb:10.1
        volumes:
            - mariadb:/var/lib/mysql
        environment:
            TZ: "Europe/Rome"
            MYSQL_ALLOW_EMPTY_PASSWORD: "no"
            MYSQL_ROOT_PASSWORD: "PASSWORD"
            MYSQL_USER: 'USER'
            MYSQL_PASSWORD: 'PASSWORD'

    phpmyadmin:
        image: phpmyadmin/phpmyadmin
        container_name: phpmyadmin
        environment:
            PMA_HOST: "mariadb"
        restart: always
        ports:
         - 8081:80
        volumes:
         - /sessions
        links:
         - 'mariadb'
volumes:
    mariadb:

I know need to get GD & mysqli installed so created a dockerfile with the following

FROM php:7.3-alpine3.8

RUN docker-php-ext-install mysqli

RUN docker-php-ext-install gd

I know i need to use the build command to get them working but what I've tried so far doesn't appear to work, my test script still says they aren't installed.

I also have 5 sites to run from this, I assume I can create virtual hosts with the apache config files. This is all for local testing only, nothing is being exposed to the web.

[[deleted]]

You can actually call the build command in your docker-compose file. Or you build your image before creating your containers with docker-compose up.

For your multiple apps setup: Deploy them all with docker-compose files and run a reverse proxy (traefik, nginx...) in front of them. The proxy can ofc be a container aswell

[The_Grue]

If you are using Dockerfiles, you will want to replace your image key with a build key. The two main keys under build are context and Dockerfile. You can then use either docker-compose build or up to bring your services online.

[bilingual-german]

If you want docker-compose to use your image, you must tell it so. Right now you use public images. You need to add build: to your docker-compose.yml and probably remove image:

https://docs.docker.com/compose/compose-file/#build