CODEWITHSUNDEEP
mysqldockerdocker-compose
LubieCiastka
LubieCiastka

Reputation: 143

Connecting Python and MySQL in docker / docker-compose

Before, I created named volume and database: 'mysql-db1' using other mysql container.

I can't connect to database from python.

My .yml file : 

    version: '3.6'

    services: 
      python:
        image: python:latest
        ports:
         - '80:80'
        volumes:
          - type: bind
            source: .
            target: /scripts
        command: tail -f /dev/null
        links:
          - 'mysql'

      mysql:
        image: mysql/mysql-server:latest
        ports:
         - '3306:3306'
        environment:
          MYSQL_ROOT_PASSWORD: root
        volumes:
          - type: volume
            source: mysql-db1
            target: /var/lib/mysql


    volumes: 
      mysql-db1:
        external: true

My simply python code: 

    import mysql.connector

    cnx = mysql.connector.connect(user='root', password='root', host='mysql', database='test1')
    cnx.close()

I can enter the database using:

    $ docker-compose exec mysql bash
    # mysql -uroot -proot -Dtest1

Error: 

    mysql.connector.errors.DatabaseError: 1130 (HY000): Host '172.18.0.3' is not allowed to connect to this MySQL server

Where is a problem?

Upvotes: 5

Views: 12376

Answers (1)

Dmitrii G.
Dmitrii G.

Reputation: 895

root user is not allowed to access the db externally by default. Use image environment variables to create a user and use that:

db:
restart: always
image: mariadb
container_name: myapp_db
environment:
  - MYSQL_USER=myuser
  - MYSQL_PASSWORD=mypass
  - MYSQL_DATABASE=mydb
  - MYSQL_ALLOW_EMPTY_PASSWORD=yes
ports:
  - 3306:3306

Upvotes: 7

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