Amarok/Manual/Organization/Collection/ExternalDatabase: Difference between revisions

    From KDE UserBase Wiki
    m (hack to make visible in docbook toc ;))
    m (fix levels)
    Line 1: Line 1:
    <languages/>
    <languages/>
    == External Database ==
    ==== External Database ====


    '''Amarok''' 2.2 and above support an external '''MySQL''' database as a backend.
    '''Amarok''' 2.2 and above support an external '''MySQL''' database as a backend.


    == Configure Server ==
    ===== Configure Server =====


    === Install MySQL-Server ===
    ===== Install MySQL-Server =====


    First you need to install an '''MySQL''' server. On Debian-based distributions like Ubuntu you can use
    First you need to install an '''MySQL''' server. On Debian-based distributions like Ubuntu you can use
    Line 12: Line 12:
    to install it. You will be asked to specify a password for the root-account for the database. The ''mysql-client'' package is needed in order to execute some of the commands in this document, but it's not fundamental to the use of '''Amarok'''.
    to install it. You will be asked to specify a password for the root-account for the database. The ''mysql-client'' package is needed in order to execute some of the commands in this document, but it's not fundamental to the use of '''Amarok'''.


    === Configure Database ===
    ===== Configure Database =====


    Connect to the local database using
    Connect to the local database using
    Line 31: Line 31:
    {{Input|1=sudo service mysql restart}}
    {{Input|1=sudo service mysql restart}}


    == Configure Client ==
    ===== Configure Client =====


    Open the configuration dialog by clicking <menuchoice>Settings -> Configure Amarok... -> Database</menuchoice>. Enable the checkbox and enter the user data.<br />
    Open the configuration dialog by clicking <menuchoice>Settings -> Configure Amarok... -> Database</menuchoice>. Enable the checkbox and enter the user data.<br />
    Line 39: Line 39:
    You need to restart '''Amarok''' so that the changes take effect.
    You need to restart '''Amarok''' so that the changes take effect.


    == Migrating from MySQL Embedded to MySQL Server ==
    ===== Migrating from MySQL Embedded to MySQL Server =====


    If you want to maintain the statistics, etc. that you have in the embedded '''MySQL''' database from before '''Amarok''' 2.2, you can do the following:
    If you want to maintain the statistics, etc. that you have in the embedded '''MySQL''' database from before '''Amarok''' 2.2, you can do the following:

    Revision as of 18:11, 5 November 2011

    External Database

    Amarok 2.2 and above support an external MySQL database as a backend.

    Configure Server
    Install MySQL-Server

    First you need to install an MySQL server. On Debian-based distributions like Ubuntu you can use

    sudo apt-get install mysql-server mysql-client

    to install it. You will be asked to specify a password for the root-account for the database. The mysql-client package is needed in order to execute some of the commands in this document, but it's not fundamental to the use of Amarok.

    Configure Database

    Connect to the local database using

    mysql -u root -p

    You will be prompted for the password for MySQL's root user. You will get the

    mysql>

    prompt.

    Create a new user amarokuser with the password amarokpass using the

    CREATE USER 'amarokuser'@'localhost' IDENTIFIED BY 'amarokpass';

    command. Amarok needs its own database, which is created with

    CREATE DATABASE amarokdb;

    Give the new user access to the database by entering the

    GRANT ALL ON amarokdb.* TO 'amarokuser'@'%' IDENTIFIED BY 'amarokpass';

    command, where % is a wildcard to allow all hosts to connect to the database. Now use the

    FLUSH PRIVILEGES;

    statement to reload various internal caches used by MySQL. Finally

    exit

    closes the MySQL prompt.
    By default the server can only be accessed by the local host. To change this you need to edit the file /etc/mysql/my.cnf and adjust the address near bind-address to the one your server listens on the network. 0.0.0.0 listens on all interfaces. After that you need to restart the server using

    sudo service mysql restart
    Configure Client

    Open the configuration dialog by clicking Settings -> Configure Amarok... -> Database. Enable the checkbox and enter the user data.



    You need to restart Amarok so that the changes take effect.

    Migrating from MySQL Embedded to MySQL Server

    If you want to maintain the statistics, etc. that you have in the embedded MySQL database from before Amarok 2.2, you can do the following: First, start Amarok 2.2+ at least once to give the database a chance to update to the latest schema version.

    Next, kill the running MySQL service

    sudo /etc/init.d/mysql stop

    and start a MySQL daemon from your ~/.kde4/share/apps/amarok directory (--defaults-file MUST be the first option!):

    /usr/sbin/mysqld --defaults-file=`pwd`/my.cnf --default-storage-engine=MyISAM --datadir=`pwd`/mysqle --socket=`pwd`/sock --skip-grant-tables

    The skip-grant-tables means you can use any password or username to connect to it. 'localhost' will not work, the MySQL client will try to use a Unix socket. Using 127.0.0.1 as the host makes it work. Some systems may restrict this access through apparmor or SELinux. They can be temporarily disabled with

    sudo /etc/init.d/apparmor stop

    Now, run mysqldump, passing in the -S option to specify the local socket. This will dump your old embedded DB out to a SQL file.

    mysqldump -S sock amarok > amarok.mysql

    You can then restart your MySQL service and load this SQL file into your MySQL server. You'll have needed to already run the GRANT statement above and create an Amarok database ("CREATE DATABASE amarok;"):

    sudo /etc/init.d/mysql stop
     mysql -u amarokuser -p amarok < amarok.mysql

    Note

    You may need to re-scan your collection in Amarok after completing this.