New recipe: Redmine with MariaDB.

.recipes/redmine_mariadb/configs/database.yml

@@ -0,0 +1,21 @@
+# = Redmine database configuration file
+# The entrypoint script sets chown 999:999 and chmod 644 to this file.
+#
+# Note that this file needs to be a valid YAML file.
+# DO NOT USE TABS! Use 2 spaces instead of tabs for indentation.
+
+production:
+  adapter: mysql2
+  database: redmine
+  host: database
+  username: redmine
+  # It should be the same as in the docker-compose.yml file.
+  password: "secret-1"
+  # Use "utf8" instead of "utfmb4" for MySQL prior to 5.7.7
+  encoding: utf8mb4
+  variables:
+    # Recommended `transaction_isolation` for MySQL to avoid concurrency issues is
+    # `READ-COMMITTED`.
+    # In case of MySQL lower than 8, the variable name is `tx_isolation`.
+    # See https://www.redmine.org/projects/redmine/wiki/MySQL_configuration
+    transaction_isolation: "READ-COMMITTED"