Does that user from MaxScale have PROCESS permissions? That's normally the only reason i've run into that error, but I'm not a MaxScale user, so hopefully it's somewhat helpful. On Thu, May 9, 2019 at 11:47 AM Nicolas Bigler <nicolas.bigler@vshn.ch> wrote:
Hey community
I'm currently struggling with maxscale when trying to connect to the information_schema database.
I'm able to connect to this special database when connecting to the database server directly:
mysql -h <my_db_server> information_schema Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A
Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 101189 Server version: 10.2.23-MariaDB-1:10.2.23+maria~bionic-log mariadb.org binary distribution
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [information_schema]>
However I can't connect to the database when going through maxscale:
mysql -h 127.0.0.1 information_schema ERROR 1045 (28000): Access denied for user '<my_user>'@'127.0.0.1' (using password: YES) to database 'information_schema'
What does work is to connect to the database first (via maxscale) without specifying a database and then change to the information_schema database:
mysql -h 127.0.0.1 Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 25321 Server version: 10.2.23-MariaDB-1:10.2.23+maria~bionic-log mariadb.org binary distribution
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> use information_schema Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A
Database changed
I don't quite understand why it doesn't work directly. I have a PHP application (magento2) that reads stuff from this database.
The following PHP script shows the same issue:
<?php # Fill our vars and run on cli # $ php -f db-connect-test.php $dbname = 'information_schema'; $dbuser = '<my_db_user>'; $dbpass = '<my_super_secret_pass'; $dbhost = '127.0.0.1';
# pdo_testdb_connect.php - function for connecting to the "test" database
$dbh = new PDO('mysql:host=' . $dbhost . ';dbname=' . $dbname, $dbuser, $dbpass);
echo $dbh->exec ("SHOW TABLES FROM $dbname");
?>
$ php test.php PHP Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1045] Access denied for user '<my_db_user>'@'127.0.0.1' (using password: YES) to database 'information_schema' in /tmp/test.php:12 Stack trace: #0 /tmp/test.php(12): PDO->__construct('mysql:host=127....', '<my_db_user>', '<my_super_secret_pass>...') #1 {main} thrown in /tmp/test.php on line 12
Is there a way to solve this issue?
Any help would be appreciated.
Thanks
Nicolas
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