[SOLVED] mysql will not start

  • I had manually installed mysql server (for Kodi) via apt-get.
    All was seemed fine (my Db was working via Kodi and life was good).
    I had installed MySQL Plugin AS WELL (I cannot remember why) but all seemed to be working fine.


    Today, I needed to unmount one drive so began taking the various services offline including mySQL plugin.
    And now the mysql server want start.


    I uninstalled everything using:

    Code
    dpkg -l | grep -i mysql
    mkdir -p /var/lib/mywebsql
    apt-get remove --purge mysql\*
    apt-get clean
    rm -R /var/lib/mysql
    rm -R /etc/mysql
    dpkg -l | grep -i mysql


    Then, Installed the OMV mysql plugin. Installed went fine.
    But, when I change the plugin settings via the GUI (to change the bind address to OMV's IP address for example) and save & apply, I get an error:



    And the server just does not start.
    If I try to manually start it via command line, I get:

    Code
    root@OMV:~# /etc/init.d/mysql restart
    Stopping MySQL database server: mysqld.
    Starting MySQL database server: mysqld . . . . . . . . . . . . . . failed!
    root@OMV:~#

    What is wrong and what can I do to resolve ?


    UPDATE:
    Some how, OMV plugin GUI for MySQL is out of sync with what mysql is actually doing.
    I just checked the processes related to mysql:


    Code
    root@OMV:~# ps aux | grep mysql | grep -v grep
    root 17395 0.0 0.0 4188 656 ? S 16:14 0:00 /bin/sh /usr/bin/mysqld_safe
    mysql 17759 0.8 0.5 420776 47732 ? Sl 16:14 0:00 /usr/sbin/mysqld --basedir=/usr --datadir=/media/cb48ff4f-08f7-499f-b5ca-9713f8571f49/mysql/ --plugin-dir=/usr/lib/mysql/plugin --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
    root 17760 0.0 0.0 4096 616 ? S 16:14 0:00 logger -t mysqld -p daemon.error
    root@OMV:~#


    Now, if I KILL the mysqld process 17759, then go back to the OMV GUI, I can apply then changes and it starts the sql server.
    If I check the status of mysql, I get an error:



    Code
    root@OMV:~# /etc/init.d/mysql status
    /usr/bin/mysqladmin: connect to server at 'localhost' failed
    error: 'Access denied for user 'debian-sys-maint'@'localhost' (using password: YES)'
    .
    root@OMV:~#

    Not sure if that's the problem ?

  • Thx for the pointers. I found the solution.
    The key was this post #37 followed by this post #47.


    In summary, I had to do the following commands:

    Code
    mysql_upgrade -u root -p
    GRANT ALL PRIVILEGES ON *.* TO 'debian-sys-maint'@'localhost' IDENTIFIED BY '***********';

    where '***********' is the password in the file /etc/mysql/debian.cnf


    Now the OMV GUI for starting and stopping the MySQL service works and so does the command 'service mysql stop'.


    Many thanks for pointing me in the direction.

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