authelia/docs/content/en/reference/integrations/database-integrations.md

title	description	lead	date	draft	images	menu	weight	toc
Database Integrations	A database integration reference guide	This section contains a database integration reference guide for Authelia.	2022-11-19T16:47:09+11:00	false		reference parent integrations	320	true

We generally recommend using PostgreSQL for a database. If high availability is not a consideration we also support SQLite3.

It is also a general recommendation that if you're using PostgreSQL, MySQL, or MariaDB; that you do not automatically upgrade the major/minor version of these databases, and pin the image tag so at most the patch version is updated. For example for database version x.y.z only the z should change, x and y should remain the same.

It is also generally recommended that you do not rely on automatic update tools to perform this action unless you are sure they shut down the container properly (i.e. with a graceful stop).

PostgreSQL

The only current support criteria for PostgreSQL at present is that the version you're using is supported by the PostgreSQL developers. See Vendor Supported Versions more information.

We generally perform integration testing against the latest supported version of PostgreSQL and that is generally the recommended version for new installations.

Vendor Supported Versions

See the PostgreSQL Versioning Policy for information on the versions and platforms that are currently supported by this vendor.

MySQL

MySQL and MariaDB are both supported as part of the MySQL implementation. This is generally discouraged as PostgreSQL is widely considered as a significantly better database engine. If you choose to go with MySQL, we recommend specifically using the MariaDB backend.

MySQL comes with some rigid support requirements in addition to the standard requirements for us supporting a third party.

1. Must both support the InnoDB engine and this engine must be the default engine.
2. Must support the utf8mb4 charset.
3. Must support the utf8mb4_unicode_520_ci collation.
4. Must support maximum index size of no less than 2048 bytes. The default maximum index size for the InnoDB engine is 3072 bytes on:
   1. MySQL 8.0 or later.
   2. MySQL 5.7 provided innodb_large_prefix or later.
   3. MariaDB 10.3 or later.
5. Must support ANSI standard time behaviours. See ANSI standard time behaviours.

We generally perform integration testing against the latest supported version of MySQL and MariaDB, and the latest supported version of MariaDB is generally the recommended version for new installations.

Specific Notes

InnoDB Large Prefixes

This can be configured in the MySQL configuration file by setting the innodb_large_prefix value to on. According to the Oracle documentation this is the default behaviour in MySQL 5.7 and it can't be turned off in MySQL 8.0 or in MariaDB 10.3 and later.

[mysqld]
innodb_large_prefix = ON

ANSI standard time behaviours

This can be configured in the MySQL configuration file by setting the explicit_defaults_for_timestamp value to on. According to the Oracle documentation this is the default behaviour in MySQL 5.7 and MySQL 8.0. This is however not the default behaviour in MariaDB before 10.10.

[mysqld]
explicit_defaults_for_timestamp = ON

Upgrades

MySQL and MariaDB have several standard databases named mysql, sys, and performance_schema. These databases are outside the scope for an application to manage. These engines may not prevent you using a version of MySQL or MariaDB with these databases which is incompatible.

It is your responsibility to ensure these tables are upgraded as per the mysql_upgrade documentation for MySQL and documentation for MariaDB. Some containers or some versions of MySQL and MariaDB may do this for you, but this is out of scope for us to support.

Vendor Supported Versions

MariaDB Vendor Supported Versions

See the MariaDB Server Releases for information on the versions and platforms that are currently supported by this vendor.

MySQL Vendor Supported Versions

See the MySQL Supported Platforms for information on the versions and platforms that are currently supported by this vendor.