gnu: services: Add mysql-service.

* gnu/services/database.scm (<mysql-configuration>): New record type.
(%mysql-accounts, mysql-service-type): New variables.
(mysql-configuration-file, %mysql-activation, mysql-shepherd-services)
(mysql-services): New procedures.
* doc/guix.texi (Database Services): Document it.

1 files changed, 22 insertions, 1 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 227d8614825..cbecc3e96fd 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -8001,7 +8001,7 @@ web site} for more information.
 @node Database Services
 @subsubsection Database Services
 
-The @code{(gnu services databases)} module provides the following service.
+The @code{(gnu services databases)} module provides the following services.
 
 @deffn {Scheme Procedure} postgresql-service [#:postgresql postgresql] @
        [#:config-file] [#:data-directory ``/var/lib/postgresql/data'']
@@ -8013,6 +8013,27 @@ The PostgreSQL daemon loads its runtime configuration from
 @var{data-directory}.
 @end deffn
 
+@deffn {Scheme Procedure} mysql-service [#:config (mysql-configuration)]
+Return a service that runs @command{mysqld}, the MySQL or MariaDB
+database server.
+
+The optional @var{config} argument specifies the configuration for
+@command{mysqld}, which should be a @code{<mysql-configuraiton>} object.
+@end deffn
+
+@deftp {Data Type} mysql-configuration
+Data type representing the configuration of @var{mysql-service}.
+
+@table @asis
+@item @code{mysql} (default: @var{mariadb})
+Package object of the MySQL database server, can be either @var{mariadb}
+or @var{mysql}.
+
+For MySQL, a temorary root password will be displayed at activation time.
+For MariaDB, the root password is empty.
+@end table
+@end deftp
+
 @node Mail Services
 @subsubsection Mail Services