Cannot connect to grafana using port

Question

Below is my docker-compose.yml file

version: '3.2'

services:
 mysql-server:
    container_name: mysql
    ports:
        - "13306:3306"
    environment:
        MYSQL_ROOT_PASSWORD: 12345
        MYSQL_DATABASE: wordpress
        MYSQL_USER: wordpress_user
        MYSQL_PASSWORD: secret
    image: mysql/mysql-server
 grafana:
    image: grafana/grafana
    container_name: grafana
    environment:
        DB_HOST: mysql-server:3306
    ports:
        - "3000:3000"
    depends_on:
    - mysql-server

I would like to connect to grafana and use mysql to be my datasource. However, when I connect to grafana using 'container ip address + port' 172.19.0.3 (retrieved by using 'docker inspect containerID'):3306. It cannot connect to grafana. I tried to close my firewall but still failed. Or my method of connection is wrong?

Besides, when I set MySQL as datasource in grafana, is the host be: mysql-server:3306?

Answer 1

So far you have not cared about networking of the two containers. Yes, both of them expose a port on the host - but you are not trying to access that one. Instead you are trying to make a connection from one container directly to the other container.

• First step is to create a bridged network .
• Then define both containers to be connected to that network .
• Finally you can use the name of one container as hostname to connect from the other container.