MariaDB

From Gentoo Wiki
Jump to: navigation, search

MariaDB is an enhanced, drop-in MySQL replacement.

In Gentoo, dev-db/mariadb is the default package for items that depend on virtual/mysql.

Installation

USE flags

USE flags for dev-db/mariadb An enhanced, drop-in replacement for MySQL

backup Build mariadb-backup which supports SST and hot backup of InnoDB, Aria and MyISAM including compression and encryption
bindist Flag to enable or disable options for prebuilt (GRP) packages (eg. due to licensing issues)
extraengine Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
galera Enables galera replication
innodb-lz4 Enables lz4 compression methods for InnoDB/XtraDB
innodb-lzo Enables lzo compression methods for InnoDB/XtraDB
innodb-snappy Enables snappy compression methods for InnoDB/XtraDB using app-arch/snappy
jdbc Enable the CONNECT engine to access foreign databases via JDBC
latin1 Use LATIN1 encoding instead of UTF8
libressl Enable SSL connections and crypto functions using dev-libs/libressl
mroonga Add support for the Mroonga engine for interfacing with the Groonga text search
numa Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)
oqgraph Add support for the Open Query GRAPH engine
pam Enable the optional PAM authentication plugin for the server
profiling Add support for statement profiling (requires USE=community).
rocksdb Add support for RocksDB; a key/value, LSM database optimized for flash storage
server Build the server program
sphinx Add suport for the sphinx full-text search engine
sst-mariabackup Add tools needed to support the mariabackup SST method
sst-rsync Add tools needed to support the rsync SST method
systemtap Build support for profiling and tracing using dev-util/systemtap
test Install upstream testsuites for end use.
tokudb Add support for TokuDB storage engine
yassl Enable SSL connections and crypto functions using the bundled yaSSL

Emerge

Install dev-db/mariadb:

root #emerge --ask mariadb

Service

OpenRC

To have MariaDB started automatically at boot, add it to the default runlevel:

root #rc-update add mysql default

If MariaDB is configured, start the service:

root #rc-service mysql start

systemd

  • With MariaDB < 10.1
root #systemctl enable mysqld.service
  • With MariaDB >= 10.1.8
root #systemctl enable mariadb.service
Note
MariaDB 10.1.8 includes a unit named mariadb.service that uses notify instead of a script to check if the system is alive.

Configuration

Preliminary configuration

Gentoo MariaDB package maintainers will help you set up MariaDB through the configuration option in the ebuild.

root #emerge --config dev-db/mariadb

The configuration will create a database, set proper permissions, and assist you in creating a secure root password (this is for the MariaDB root account, which is not related to the Linux root account).

Note
When configuring MariaDB on a system with 'localhost' as its hostname, the "Your machine must NOT be named localhost" error is produced. The following steps will allow configuration by changing the hostname.

In the event MariaDB configuration fails due to 'localhost' as hostname, update the system hostname variable to a name other than 'localhost' in /etc/conf.d/hostname:

root #sed -i 's/localhost/larry/g' /etc/conf.d/hostname

Restart the hostname service:

root #rc-service hostname restart

Then, run the configuration command:

root #emerge --config dev-db/mariadb

In-database configuration

When the database is set up and running, connect to MariaDB using the mysql client application.

user $mysql -u root -p -h localhost
Enter root password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 86415
Server version: 5.5.32-MariaDB-log Source distribution

Copyright (c) 2000, 2013, Oracle, Monty Program Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

Custom options

Beginning with MariaDB 10.2, the configuration file my.cnf, includes a single directive to include /etc/mysql/mariadb.d and all files located within. Gentoo includes a file for server settings and one for client settings. Create your own files in this directory and they will be added together in alphabetical order. The base configuration accepts almost all the defaults and only tweaks paths. Tune your server to your liking.

Troubleshooting

Compiling against libmariadb.so

Beginning with MariaDB 10.2, a new LGPL client library is included.

With MariaDB 10.2.8, the server and client headers were separated. This causes compilation errors in some programs which previously relied on server features.

MYSQL_SERVER_VERSION

One example is MYSQL_SERVER_VERSION. A quick fix can be:

#if defined MARIADB_CLIENT_VERSION_STR && !defined MYSQL_SERVER_VERSION
  #define MYSQL_SERVER_VERSION MARIADB_CLIENT_VERSION_STR
#endif

Ultimately, MYSQL_SERVER_VERSION should be removed and use the MYSQL_VERSION_ID integer for version identification.

See also

  • MySQL/Startup Guide — outlines basic instructions for users on setting up and using MySQL on Linux.
  • PostgreSQL — a free and open source relational database management system (RDBMS).

External resources