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Unable to access clients' MySQL databases on Plesk for Windows: Access denied for user 'admin'@'localhost' (using password: YES)

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Denis Bykov
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Applicable to:

  • Plesk for Windows

Note: This article is related to MySQL user's databases server on Windows. Not the Plesk SQL one. Plesk interface should be accessible.

Symptoms

  • Cannot make database dump:

    CONFIG_TEXT: mysqldump: Got error: 1045: Access denied for user 'admin'@'localhost' (using password: YES) when trying to connect

  • Attempts to manage a customer's MySQL databases produce errors:

    PLESK_ERROR: Error: Connection to the database server has failed because of network problems: Try to establish connection failed

    PLESK_ERROR: Error: Connection to the database server has failed because the supplied account does not possess administrative privileges: Access denied for user 'admin'@'localhost' (using password: YES)

  • The MySQL server is marked in red on the Tools & Settings > Database Servers screen.

Cause

Plesk stores incorrect MySQL server administrator password.

Resolution

To solve the issue and reconnect Plesk to the MySQL server do the following:

  1. Connect to the server using RDP.

  2. Stop the MySQL server (but not "Plesk SQL Server") from running on port 3306 using the Plesk Services Monitor, that can be started from Windows Start menu.

  3. Edit the MySQL configuration file %plesk_dir%Databases\MySQL\my.ini (%plesk_dir%Databases\MySQL\Data\my.ini in Plesk 12.5 or lower) and add the line skip-grant-tables to the [mysqld] section and save it using text editor:

    CONFIG_TEXT: [mysql]
    skip-grant-tables

  4. Start the MySQL server using the Plesk Services Monitor.

  5. Log into MySQL without the password:

    C:\> "%plesk_dir%\MySQL\bin\mysql.exe" -P3306

    For Plesk 12.5 or older:

    C:\> "%plesk_dir%\Databases\MySQL51\bin\mysql.exe"

  6. Change the password for the MySQL administrator. For MySQL 5.1 and older:

    MYSQL_WIN: UPDATE mysql.user SET Password = password('newpassword') WHERE User = 'admin';

    For MySQL 5.6 and newer:

    MYSQL_WIN: UPDATE mysql.user SET authentication_string = password('newpassword') WHERE User = 'admin';

    If there is no user "admin" in MySQL find the actual MySQL administrator and rename the user to "admin":

    MYSQL_WIN: mysql> UPDATE mysql.user SET Password = password('newpassword') WHERE User = 'admin';
    Query OK, 0 rows affected (0.00 sec) <-- No user "admin" found
    mysql> select host, user from mysql.user;
    +-----------+------------------+
    | host | user |
    +-----------+------------------+
    | localhost | local_mysql_root | <--- MySQL administrator was renamed to "local_mysql_root"
    +-----------+------------------+
    1 row in set (0.00 sec)

    mysql> update user set user="admin" where user="local_mysql_root";
    Query OK, 1 row affected (0.00 sec)
    Rows matched: 1 Changed: 1 Warnings: 0

    mysql> UPDATE mysql.user SET Password = password('newpassword') WHERE User = 'admin';
    Query OK, 1 row affected (0.00 sec)
    Rows matched: 1 Changed: 1 Warnings: 0

  7. Remove skip-grant-tables from the MySQL configuration file and restart the service.

  8. Log into the Plesk interface, go to the database server management settings ( Tools & Settings > Database Servers ), and change the password for the corresponding database server to the one set in Step 5. Plesk will re-establish the connection to the server.

Note: in some rare cases step 6 may not work and the following procedure can be used for the admin user How to Reset the Root Password. Make sure the commands are adapted for the admin user.

Additional Information

How to retrieve/reset a password for the "admin" user in Plesk for Linux?

Comments

4 comments

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  • Avatar
    Alberto Garcia

    Where can I finde the Plesk Services Monitor in LINUX?

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  • Avatar
    Nikolay Zhmuk

    @Alberto Garcia for Linux systems check the articles below:

    https://support.plesk.com/hc/en-us/articles/213376789

    https://support.plesk.com/hc/en-us/articles/213364309

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  • Avatar
    Alberto Garcia

    Thanks I am still having problems.

     

    With the second Link I have this error message

    ERROR 1045 (28000): Access denied for user 'admin'@'localhost' (using password: YES)

    And with the first link the following error:

    [2017-08-28 07:29:11] ERR [panel] SQLSTATE[HY000] [1045] Access denied for user 'admin'@'localhost' (using password: YES):
    0: /opt/psa/admin/externals/Zend/Db/Adapter/Pdo/Abstract.php:144
            Zend_Db_Adapter_Pdo_Abstract->_connect()
    ...
    ERROR: Zend_Db_Adapter_Exception: SQLSTATE[HY000] [1045] Access denied for user 'admin'@'localhost' (using password: YES) (Abstract.php:144)
    exit status 1

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  • Avatar
    Nikolay Zhmuk

    @Alberto Garcia Have you tried to add skip-grant-tables directive to my.cnf file, restart the mysql service and reset the password for admin? Also, if there were upgrade of mysql server recently, check error log of mysql service, the message should be self-explanatory. If the issue still persists I recommend to contact Technical Support directly - https://www.plesk.com/contact-support

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