Enable Docker Grafana to use MySQL or Postgres

Change-Id: If0ef7af8a432581b20745bf09c7680743b8cafe8
diff --git a/docker/swarm/service/dashboard/grafana_server.yml b/docker/swarm/service/dashboard/grafana_server.yml
index 4ed587e..5da0164 100644
--- a/docker/swarm/service/dashboard/grafana_server.yml
+++ b/docker/swarm/service/dashboard/grafana_server.yml
@@ -1,10 +1,20 @@
 parameters:
+  _param:
+    grafana_database_type: sqlite3
+    grafana_database_host: localhost
+    grafana_database_port: 3306
+    grafana_database_password: password
   docker:
     client:
       service:
         grafana_server:
           replica: 1
           environment:
+            GF_DATABASE_TYPE: ${_param:grafana_database_type}
+            GF_DATABASE_NAME: grafana
+            GF_DATABASE_USER: grafana
+            GF_DATABASE_PASSWORD: ${_param:grafana_database_password}
+            GF_DATABASE_HOST: "${_param:grafana_database_host}:${_param:grafana_database_port}"
             GF_SECURITY_ADMIN_PASSWORD: ${_param:grafana_admin_password}
           restart:
             condition: any