add info for grafana configuration

engineering-guide/metrics.md

@@ -17,3 +17,31 @@ New telegraf/hiera metric sources are automatically added by a systemd timer onc
 
 To add a new metric source manually go about like this:
 ![](_static/add_new_metric_source.png)
+
+
+## Configuration
+
+### Grafana Dashboard Management
+Dashboards can be automatically imported into grafana via files on the filesytem: https://grafana.com/docs/grafana/latest/administration/provisioning/#dashboards
+
+**/etc/grafana/provisioning/dashboards/importer.yaml**:
+```yaml
+# # config file version
+# https://grafana.com/docs/grafana/latest/administration/provisioning/#dashboards
+apiVersion: 1
+
+providers:
+ - name: 'default'
+   orgId: 1
+   folder: ''
+   folderUid: ''
+   type: file
+   disableDeletion: false
+   updateIntervalSeconds: 10
+   allowUiUpdates: false
+   options:
+     path: /var/lib/grafana/dashboards
+     foldersFromFilesStructure: true
+```
+
+The dashboard `.json` files need to be located then in `/var/lib/grafana/dashboards`