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Moodle on Alpine Linux

Docker Pulls Docker Image Size nginx 1.26 php 8.4 moodle-4.5.0 License MIT

Moodle setup for Docker, build on Alpine Linux. The image is only +/- 70MB large.

Repository: https://github.com/erseco/alpine-moodle

  • Built on the lightweight image https://github.com/erseco/alpine-php-webserver
  • Very small Docker image size (+/-70MB)
  • Uses PHP 8.4 for better performance, lower cpu usage & memory footprint
  • Support for HA installations: php-redis, php-ldap (also with self-signed certs)
  • Multi-arch support: 386, amd64, arm/v6, arm/v7, arm64, ppc64le, s390x
  • Optimized for 100 concurrent users
  • Optimized to only use resources when there's traffic (by using PHP-FPM's ondemand PM)
  • Use of runit instead of supervisord to reduce memory footprint
  • Configured cron to run as non-privileged user gliderlabs/docker-alpine#381 (comment)
  • docker-compose sample with PostgreSQL and Redis
  • Configuration via ENV variables
  • Easily upgradable to new moodle versions
  • The servers Nginx, PHP-FPM run under a non-privileged user (nobody) to make it more secure
  • The logs of all the services are redirected to the output of the Docker container (visible with docker logs -f <container name>)
  • Follows the KISS principle (Keep It Simple, Stupid) to make it easy to understand and adjust the image to your needs

Usage

Start the Docker containers:

docker-compose up

Login on the system using the provided credentials (ENV vars)

Running Commands as Root

In certain situations, you might need to run commands as root within your Moodle container, for example, to install additional packages. You can do this using the docker-compose exec command with the --user root option. Here's how:

docker-compose exec --user root moodle sh

Configuration

Define the ENV variables in docker-compose.yml file

Variable Name Default Description
LANG en_US.UTF-8
LANGUAGE en_US:en
SITE_URL http://localhost Sets the public site url
REVERSEPROXY false Enable when setting up advanced reverse proxy
SSLPROXY false Disable SSL proxy to avoid site loop. Ej. Cloudfare
REDIS_HOST Set the host of the redis instance. Ej. redis
DB_TYPE pgsql mysqli - pgsql - mariadb
DB_HOST postgres DB_HOST Ej. db container name
DB_PORT 5432 Postgres=5432 - MySQL=3306
DB_NAME moodle
DB_USER moodle
DB_FETCHBUFFERSIZE Set to 0 if using PostgresSQL poolers like PgBouncer in 'transaction' mode
DB_DBHANDLEOPTIONS false Set to true if using PostgresSQL poolers like PgBouncer which does not support sending options
DB_HOST_REPLICA Database hostname of the read-only replica database
DB_PORT_REPLICA Database port of replica, left it empty to be same as DB_PORT
DB_USER_REPLICA Database login username of replica, left it empty to be same as DB_USER
DB_PASS_REPLICA Database login password of replica, left it empty to be same as DB_PASS
DB_PREFIX mdl_ Database prefix. WARNING: don't use numeric values or moodle won't start
MY_CERTIFICATES none Trusted LDAP certificate or chain getting through base64 encode
MOODLE_EMAIL [email protected]
MOODLE_LANGUAGE en
MOODLE_SITENAME New-Site
MOODLE_USERNAME moodleuser
MOODLE_PASSWORD PLEASE_CHANGEME
SMTP_HOST smtp.gmail.com
SMTP_PORT 587
SMTP_USER [email protected]
SMTP_PASSWORD your_password
SMTP_PROTOCOL tls
MOODLE_MAIL_NOREPLY_ADDRESS noreply@localhost
MOODLE_MAIL_PREFIX [moodle]
AUTO_UPDATE_MOODLE true Set to false to disable performing update of Moodle (e.g. plugins) at docker start
DEBUG false
client_max_body_size 50M
post_max_size 50M
upload_max_filesize 50M
max_input_vars 5000
PRE_CONFIGURE_COMMANDS Commands to run before starting the configuration
POST_CONFIGURE_COMMANDS Commands to run after finished the configuration

Pre and Post Configuration Commands

You can define commands to be executed before and after the configuration of Moodle using the PRE_CONFIGURE_COMMANDS and POST_CONFIGURE_COMMANDS environment variables. These can be useful for tasks such as installing additional packages or running scripts.

Example docker-compose.yml configuration:

services:
  moodle:
    image: erseco/alpine-moodle
    environment:
      SITE_URL: "http://localhost"
      DB_TYPE: "pgsql"
      DB_HOST: "postgres"
      DB_PORT: 5432
      DB_NAME: "moodle"
      DB_USER: "moodle"
      MOODLE_USERNAME: "admin"
      MOODLE_PASSWORD: "admin"
      PRE_CONFIGURE_COMMANDS: "echo 'Running pre-configure commands'"
      POST_CONFIGURE_COMMANDS: "echo 'Running post-configure commands'"