Trying to use mariadb md, just to see whether it helps

postgresql.yaml

@@ -2,11 +2,13 @@
 document: modulemd
 version: 2
 data:
-    summary: PostgreSQL module
-    description: PostgreSQL is an advanced Object-Relational database
-                 management system (DBMS).
-                 The PostgreSQL server can be found in the
-                 postgresql-server sub-package.
+    summary: MariaDB Module
+    description: MariaDB is a community developed branch of MySQL.
+                 MariaDB is a multi-user, multi-threaded SQL database server.
+                 It is a client/server implementation consisting of a server
+                 daemon (mysqld) and many different client programs and
+                 libraries. The base package contains the standard
+                 MariaDB/MySQL client programs and generic MySQL files.
     license:
         module: [MIT]
     dependencies:
@@ -16,29 +18,34 @@ data:
               platform: []
     references:
         community: https://docs.pagure.org/modularity/
-        documentation: https://www.postgresql.org/docs/
-        tracker: https://github.com/modularity-modules/postgresql
-    api:
-        rpms:
-            - postgresql
-            - postgresql-server
+        documentation: https://github.com/container-images/mariadb/
+        tracker: https://github.com/modularity-modules/mariadb
     profiles:
         default:
             rpms:
-                - postgresql-server
+                - mariadb
+                - mariadb-server
         server:
             rpms:
-                - postgresql-server
+                - mariadb-server
         client:
             rpms:
-                - postgresql
-    filter: {}
+                - mariadb
+    api:
+        rpms:
+            - mariadb
+            - mariadb-server
+    filter:
+        rpms:
+            - mariadb-bench
+            - mariadb-server-galera
     buildopts:
         rpms:
             macros: |
                 %runselftest 0
     components:
         rpms:
-            postgresql:
-                rationale: main server component
-                ref: 3f21ecc4    # latest f27
+            # mariadb-10.1 from f26
+            mariadb:
+                rationale: MariaDB  package.
+                ref: 76a52e56