Use local network for DB connection - php

Question

We have a dedicated server with proxmox on OVH. The idea is to connect the containers locally but also trough internet. So far I have 2 containers.
I added a bridge network for local IP and that is working since I am able to ping the containers from each other.
Also added bind-address=192.168.1.3 to my.cnf.
1 container is running apache + php 7.2 (192.168.1.3)
The other container is running MySQL. (192.168.1.2)
Problem
My MySQL keeps saying SQLSTATE[HY000] [2002] Connection timed out
Here is my php code:
<?php
/**
* Configuration for database connection
*
*/
$host = "192.168.1.2";
$username = "root";
$password = "root";
$dbname = "test";
$dsn = "mysql:host=$host;dbname=$dbname";
$options = array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
);
try
{
$connection = new PDO("mysql:host=$host", $username, $password, $options);
$sql = file_get_contents("data/init.sql");
$connection->exec($sql);
echo "Database and table users created successfully.";
}
catch(PDOException $error)
{
echo $sql . "<br>" . $error->getMessage();
}
From my understanding the code is correct so it must be something with my mysql configuration.
I'm sure that is something really simple but I'm losing to much time with this.

Answer 1

Try to telnet 192.168.1.2 3306 from the Apache, PHP container. Can you connect?
Ensure the listening port for MySQL is 3306, if other then adjust the PHP code accordingly. Also ensure that iptables is not blocking any incoming connections. Also ensure you have correct permissions for the root and any other users you need to have permissions from other hosts.
Also, please check when making any config changes to MySQL, that you restart the service.

Answer 2

After searching around for a while. Found out that I had to create a new user and grant permissions to it
mysql> CREATE USER 'monty'#'localhost' IDENTIFIED BY 'some_pass';
mysql> GRANT ALL PRIVILEGES ON *.* TO 'monty'#'localhost'
-> WITH GRANT OPTION;
mysql> CREATE USER 'monty'#'%' IDENTIFIED BY 'some_pass';
mysql> GRANT ALL PRIVILEGES ON *.* TO 'monty'#'%'
-> WITH GRANT OPTION;
Also on my server config /etc/mysql/mariadb.conf.d/50-server.conf I had to comment the
bind-address = 192.168.1.3
into
#bind-address = 192.168.1.3
Then restart mysql server and change my mysql details on my php code with username 'monty' and password 'some_pass'