version: "3.8"

# Docker compose recipe for InvenTree production server
# - PostgreSQL as the database backend
# - gunicorn as the InvenTree web server
# - django-q as the InvenTree background worker process
# - nginx as a reverse proxy

# ---------------------
# READ BEFORE STARTING!
# ---------------------

# -----------------------------
# Setting environment variables
# -----------------------------
# Shared environment variables should be stored in the .env file
# Changes made to this file are reflected across all containers!
#
# IMPORTANT NOTE:
# You should not have to change *anything* within the docker-compose.yml file!
# Instead, make any changes in the .env file!
# The only *mandatory* change is to set the INVENTREE_EXT_VOLUME variable,
# which defines the directory (on your local machine) where persistent data are stored.

# ------------------------
# InvenTree Image Versions
# ------------------------
# By default, this docker-compose script targets the STABLE version of InvenTree,
# image: inventree/inventree:stable
# 
# To run the LATEST (development) version of InvenTree, change the target image to:
# image: inventree/inventree:latest
#
# Alternatively, you could target a specific tagged release version with (for example):
# image: inventree/inventree:0.5.3
#
# NOTE: If you change the target image, ensure it is the same for the following containers:
# - inventree-server
# - inventree-worker

services:
    # Database service
    # Use PostgreSQL as the database backend
    inventree-db:
        container_name: inventree-db
        image: postgres:13
        ports:
            - ${INVENTREE_DB_PORT:-5432}/tcp
        environment:
            - PGDATA=/var/lib/postgresql/data/pgdb
            - POSTGRES_USER=${INVENTREE_DB_USER:?You must provide the 'INVENTREE_DB_USER' variable in the .env file}
            - POSTGRES_PASSWORD=${INVENTREE_DB_PASSWORD:?You must provide the 'INVENTREE_DB_PASSWORD' variable in the .env file}
            - POSTGRES_DB=${INVENTREE_DB_NAME:?You must provide the 'INVENTREE_DB_NAME' variable in the .env file}
        volumes:
            # Map 'data' volume such that postgres database is stored externally
            - inventree_data:/var/lib/postgresql/data/
        restart: unless-stopped

    # InvenTree web server services
    # Uses gunicorn as the web server
    inventree-server:
        container_name: inventree-server
        # If you wish to specify a particular InvenTree version, do so here
        image: inventree/inventree:stable
        expose:
            - 8000
        depends_on:
            - inventree-db
        env_file:
            - .env
        volumes:
            # Data volume must map to /home/inventree/data
            - inventree_data:/home/inventree/data
        restart: unless-stopped

    # Background worker process handles long-running or periodic tasks
    inventree-worker:
        container_name: inventree-worker
        # If you wish to specify a particular InvenTree version, do so here
        image: inventree/inventree:stable
        command: invoke worker
        depends_on:
            - inventree-db
            - inventree-server
        env_file:
            - .env
        volumes:
            # Data volume must map to /home/inventree/data
            - inventree_data:/home/inventree/data
        restart: unless-stopped

    # nginx acts as a reverse proxy
    # static files are served directly by nginx
    # media files are served by nginx, although authentication is redirected to inventree-server
    # web requests are redirected to gunicorn
    # NOTE: You will need to provide a working nginx.conf file!
    inventree-proxy:
        container_name: inventree-proxy
        image: nginx:stable
        depends_on:
            - inventree-server
        env_file:
            - .env
        ports:
            # Default web port is 1337 (can be changed in the .env file)
            - ${INVENTREE_WEB_PORT:-1337}:80
        volumes:
            # Provide nginx configuration file to the container
            # Refer to the provided example file as a starting point
            - ./nginx.prod.conf:/etc/nginx/conf.d/default.conf:ro
            # nginx proxy needs access to static and media files
            - inventree_data:/var/www
        restart: unless-stopped

volumes:
    # NOTE: Change /path/to/data to a directory on your local machine
    # Persistent data, stored external to the container(s)
    inventree_data:
        driver: local
        driver_opts:
            type: none
            o: bind
            # This directory specified where InvenTree data are stored "outside" the docker containers
            device: ${INVENTREE_EXT_VOLUME:?You must specify the 'INVENTREE_EXT_VOLUME' variable in the .env file!}