added my.cnf for mysqld_exporter

pod/mariadb.sls

@@ -7,5 +7,14 @@ Create data directory for mariadb:
     - group: 999
     - mode: "0755"
 
+Create my.cnf for mysqlg_exporter:
+  file.managed:
+    - name: /srv/my.cnf
+    - source: salt://pod/files/my.cnf.jinja
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: "0755"
+
 {{ pod_deploy('mariadb') }}