Mariadb docker container Can't connect to MySQL server on host (111 Connection refused) with Python

Question

I am trying the connect mariadb with python using docker-compose:

docker-compose.yml

    version: \'2\'
    services:
      mariadb:
        image: bitna         


        

Answer 1

This problem is due to python containers executing prior then properly executing the database container. To remove this issue use below lines of code before mysql connection.

import time
time.sleep(1)

Your code should look like this:

import time
time.sleep(1)

mydb = mysql.connector.connect(
  host="<host>",
  user="<user_name>",
  passwd="<pswd>",
  database = "<DB_name>",
  buffered=True
)

cursor = mydb.cursor()

It worked in my case. Hope it will work for you as well.

Answer 2

The problem is not with Database or Python code; Its a raise problem coming from Docker, as database needs some time to load and python (consumer.py) container launches faster than database one.

Possible solutions:

docker healthcheck

waittime in docker

add a delay to the python consumer