数据库无法连接mysql

ping <MySQL服务器IP>

sudo systemctl status mysql

[mysqld]
bind-address = 0.0.0.0
port = 3306

GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' IDENTIFIED BY 'password';
FLUSH PRIVILEGES;

sudo ufw allow 3306/tcp

import mysql.connector

mydb = mysql.connector.connect(
  host="localhost",
  user="yourusername",
  password="yourpassword",
  database="yourdatabase"
)

import mysql.connector

try:
    connection = mysql.connector.connect(
        host="your_mysql_host",
        user="your_username",
        password="your_password",
        database="your_database"
    )
    if connection.is_connected():
        db_Info = connection.get_server_info()
        print("Connected to MySQL Server version ", db_Info)
        cursor = connection.cursor()
        cursor.execute("select database();")
        record = cursor.fetchone()
        print("You're connected to database: ", record)
except mysql.connector.Error as e:
    print("Error while connecting to MySQL", e)
finally:
    if (connection.is_connected()):
        cursor.close()
        connection.close()
        print("MySQL connection is closed")