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1. 🚀 Docker

🔗 https://docs.docker.com/get-started/08_using_compose/

docker-compose.yml

version: "3.9"

services:
    postgres: # Becomes a network alias name
        image: postgres:14-alpine
        ports:
            - 5432:5432
        volumes:
            - ~/apps/postgres:/var/lib/postgresql/data
        environment: # Defines environment variables
            - POSTGRES_PASSWORD=password
            - POSTGRES_USER=user
            - POSTGRES_DB=student

Starting the container

To start the container, run:

docker-compose up -d
  • up brings up the container
  • -d runs in detached mode

Deleting and stopping containers

To delete container: 

docker-compose down
To stop it: 
docker-compose stop

1.1. ⚙ Other Docker Compose params

  • restart: always restarts after reboot

1.2. 🌐 Networks

Network configuration example

version: "3.9"

services:
    website: # Becomes a network alias name
        image: nginx
        ports:
            - 8081:80
    website2: # Becomes a network alias name
        image: nginx
        ports:
            - 8082:80
        network:
            website_net:
                ipv4_address: 192.168.92.21
networks:
    website_net:
        ipam: #ip address management
            driver: default # bridge is default
        config:
            - subnet: 192.168.92.0/24