Using environment variables to create user@localhost - Source

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Revision: 117269
User: marc@advantex.net Funaro
Date: 2022-06-14 12:59

Answer

<<code>>
$ podman run --rm --env MARIADB_DATABASE=bob --env MARIADB_USER=roger --env MARIADB_PASSWORD=rabbit --env MARIADB_ROOT_PASSWORD=sudo -d --name m102 mariadb:10.2
81a43a5a4b317cd887b8b926b784e18147b3c3eee5d59fbca66915d6087a1beb

$ podman exec -ti m102 mysql -u roger -prabbit bob 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 8
Server version: 10.2.44-MariaDB-1:10.2.44+maria~bionic mariadb.org binary distribution

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

MariaDB [bob]> \s
--------------
mysql  Ver 15.1 Distrib 10.2.44-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2

Connection id:		8
Current database:	bob
Current user:		roger@localhost
SSL:			Not in use
Current pager:		stdout
Using outfile:		''
Using delimiter:	;
Server:			MariaDB
Server version:		10.2.44-MariaDB-1:10.2.44+maria~bionic mariadb.org binary distribution
Protocol version:	10
Connection:		Localhost via UNIX socket
Server characterset:	latin1
Db     characterset:	latin1
Client characterset:	latin1
Conn.  characterset:	latin1
UNIX socket:		/var/run/mysqld/mysqld.sock
Uptime:			24 sec

Threads: 6  Questions: 6  Slow queries: 0  Opens: 18  Flush tables: 1  Open tables: 11  Queries per second avg: 0.250
--------------

MariaDB [bob]> select current_user();
+----------------+
| current_user() |
+----------------+
| roger@%        |
+----------------+
1 row in set (0.00 sec)
<</code>>

I'm not sure what you are missing out without a user@localhost as shown above a user @% user can log in on the unix socket.

The only way is to create other users is with SQL in /docker-entrypoint-initdb.d during startup like you suggested.

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Using environment variables to create user@localhost - Source

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