Can't connect to mysql container from localhost

Question

I'm trying to set up a MySQL container for developing.

So I used docker-compose to set it up.

The container and the mysql looks OK. The thing is that I want to connect to it from a DBeaver client and I can't find how I do it.

Here is my docker-compose.yml :

version: '2'
services:
  db:
    image: 'mysql:5.7'
    volumes:
       - '~/dev/dbs-data/mysql:/var/lib/mysql'
    restart: 'always'
    expose: 
      - '3306'
    ports:
      - '3306:3306'
    environment:
       MYSQL_ROOT_PASSWORD: 'pass'
       MYSQL_DATABASE: 'db'
       MYSQL_USER: 'user'
       MYSQL_PASSWORD: 'pass'

When I try to connect it from DBeaver I get:

java.sql.SQLException: null,  message from server: 
"Host '172.18.0.1' is not allowed to connect to this MySQL server"

UPDATE

I'm not trying to connect using the IP 172.18.0.1 . I tried to connect using localhost:3306 , 127.0.0.1:3306 and with the sub IP docker gave it 0.0.0.0:3306

UPDATE

After having success connecting on my Mac, I tried again with DBeaver on my linux and again:

Tried to connect with other tool, mysql workbench:

Answer 1

On Docker, run this command to create a MySql container and it will expose the ports to the outside world of docker.

docker run --name <mysql-container-name> -p 3306:3306 -e MYSQL_ROOT_PASSWORD=<root-password> -e MYSQL_USER=root -e MYSQL_PASSWORD=<user-password> -d mysql:latest

Few points to note: You may see below error when trying to connect with DBeaver:

Public Key Retrieval is not allowed

Solution: When creating a new connection on DBeaver, go to Driver Properties look for allowPublicKeyRetrievel and set it to TRUE . Also, if needed set useSSL to FALSE .

Test your connection from DBeaver or any other clients, and it should be working.

Answer 2

As you can see in the official image documention :

MYSQL_ROOT_HOST : By default, MySQL creates the 'root'@'localhost' account. This account can only be connected to from inside the container, requiring the use of the docker exec command as noted under Connect to MySQL from the MySQL Command Line Client. To allow connections from other hosts, set this environment variable. As an example, the value "172.17.0.1", which is the default Docker gateway IP, will allow connections from the Docker host machine.

So you have to set the MYSQL_ROOT_HOST variable with the address 172.18.0.1 that you can see in the error message.

Answer 3

I am new to docker and was experiencing the same issue in Linux, it was an issue with the addresses allowed to accept connection; here is what worked out for me:

1. Find the MySql configuration file named mysqld.cnf
   It would be: /etc/mysql/mysql.conf.d/mysqld.cnf
   Or if you have your own configuration file.
2. Edit the bind-address key in it.
   Set it as:
   bind-address = 0.0.0.0
3. This will allow to accept connections from any IP address
   Restart docker-compose by
   docker-compose down docker-compose down
docker-compose up docker-compose up
   
4. Wait for MySQL to start, it should work fine now.