docker-compose.yml

# Compose file format version 3.8 is for Docker version 19.03.0 and higher, aka it works for our Docker version: 20.10.2
version: '3.8'
services:
  db:
    image: mysql:8.0
    container_name: mysql-vcr-db
    #always restart when it is stopped by something (not manually stopped)
    restart: always
    environment:
      # Exposed port
      # MYSQL_PORT: 49160
      # Host of the local machine
      # MYSQL_HOST: localhost
      # Name of the database
      MYSQL_DATABASE: 'users'
      # Database username
      MYSQL_USER: 'user'
      # Database password
      MYSQL_PASSWORD: 'secret'
      # Root password
      MYSQL_ROOT_PASSWORD: 'secret'
    ports:
      # <Port exposed> : < MySQL Port running inside container>
      - '49160:3306'
    expose:
      # Opens port 3306 on the container
      - '3306' # MUST BE 3306!
      # Where our data will be persisted
    # Initialise database based on sql-file
    command: --init-file /docker-entrypoint-initdb.d/vr-collaboration-room-db-dev.sql
    volumes:
      - ./vr-collaboration-room-db-dev.sql:/docker-entrypoint-initdb.d/vr-collaboration-room-db-dev.sql
      - mysql-db:/var/lib/mysql
          
  redis:
    image: "redis:alpine"
    command: redis-server --requirepass password
    container_name: redis-token-db
    restart: always
    ports:
      - '49161:6379'
    expose:
      - '6379'
    volumes:
      - token-db:/var/lib/redis
           
  session-microservice:
    build: ./session-microservice
    command: node server.js
    container_name: session-microservice
    environment:
      # Exposed port
      MYSQL_PORT: '3306'
      # Host of the local machine
      MYSQL_HOST: 'localhost'
      # Name of the database
      MYSQL_DATABASE: 'users'
      # Database username
      MYSQL_USER: 'root'
      # Database password
      MYSQL_PASSWORD: 'password'
    ports:
       - '49162:8080'
    expose:
      - '8080'
    volumes:
      - ./session-microservice:/app 
volumes:
  vr-collaboration-room-db-dev.sql:
  mysql-db:
  token-db:
  session-microservice:
  
      # Open docker exec cmd
        # "docker exec -it db99f7d01e4a sh"
            # Then "redis-cli" to open server
                #auth password
        
    #We use redis SET (strings) because it is faster than lpush(list) (add, delete and check is O(1))
    #https://hashnode.com/post/differences-between-lists-and-sets-in-redis-ciojr30i401g3lh5364dkoqwv
    
    # A token needs: userID and userEmail
    #Each token generated is added to redis via SET "userID" "userEmail"
    # SET syntax: "SET name "key" EX 3600"
    # EX 3600 = token expires after 3600 seconds
    # NX = Only set the key if it don't exist
    
    # SET token1 "user1" EX 3600
    # HMSET token1 userID "ID"
    # HMSET token1 userEmail "ali.baba@gmail.com"
    # HMGET token1 userID userEmail
    # EXPIRE tokenname 60
    # set token '{"userID: 1", "userEmail: ompa.lompa@gmail.com"}'