Provide local Grafana configuration for StatsD (#1002)

* Grafana configuration

* Basic dashboard

* Finalize config

config/grafana/dashboard-config.json

@@ -0,0 +1,144 @@
+{
+    "annotations": {
+      "list": [
+        {
+          "$$hashKey": "object:38",
+          "builtIn": 1,
+          "datasource": "-- Grafana --",
+          "enable": true,
+          "hide": true,
+          "iconColor": "rgba(0, 211, 255, 1)",
+          "name": "Annotations & Alerts",
+          "type": "dashboard"
+        }
+      ]
+    },
+    "description": "Scraped metrics pushed by Promitor by using StatsD",
+    "editable": true,
+    "gnetId": null,
+    "graphTooltip": 0,
+    "links": [],
+    "panels": [
+      {
+        "aliasColors": {},
+        "bars": false,
+        "dashLength": 10,
+        "dashes": false,
+        "datasource": "Graphite",
+        "description": "Scraped metrics pushed by Promitor by using StatsD",
+        "fill": 1,
+        "fillGradient": 0,
+        "gridPos": {
+          "h": 23,
+          "w": 24,
+          "x": 0,
+          "y": 0
+        },
+        "hiddenSeries": false,
+        "id": 2,
+        "legend": {
+          "avg": false,
+          "current": false,
+          "max": false,
+          "min": false,
+          "show": true,
+          "total": false,
+          "values": false
+        },
+        "lines": true,
+        "linewidth": 1,
+        "nullPointMode": "null",
+        "options": {
+          "dataLinks": []
+        },
+        "percentage": false,
+        "pointradius": 2,
+        "points": false,
+        "renderer": "flot",
+        "seriesOverrides": [],
+        "spaceLength": 10,
+        "stack": false,
+        "steppedLine": false,
+        "targets": [
+          {
+            "refId": "A",
+            "target": "stats.gauges.promitor.*"
+          }
+        ],
+        "thresholds": [],
+        "timeFrom": null,
+        "timeRegions": [],
+        "timeShift": null,
+        "title": "Metrics Overview (StatsD)",
+        "tooltip": {
+          "shared": true,
+          "sort": 0,
+          "value_type": "individual"
+        },
+        "transparent": true,
+        "type": "graph",
+        "xaxis": {
+          "buckets": null,
+          "mode": "time",
+          "name": null,
+          "show": true,
+          "values": []
+        },
+        "yaxes": [
+          {
+            "$$hashKey": "object:114",
+            "format": "short",
+            "label": null,
+            "logBase": 1,
+            "max": null,
+            "min": null,
+            "show": true
+          },
+          {
+            "$$hashKey": "object:115",
+            "format": "short",
+            "label": null,
+            "logBase": 1,
+            "max": null,
+            "min": null,
+            "show": true
+          }
+        ],
+        "yaxis": {
+          "align": false,
+          "alignLevel": null
+        }
+      }
+    ],
+    "schemaVersion": 22,
+    "style": "dark",
+    "tags": [],
+    "templating": {
+      "list": []
+    },
+    "time": {
+      "from": "now-5m",
+      "to": "now"
+    },
+    "timepicker": {
+      "refresh_intervals": [
+        "5s",
+        "10s",
+        "30s",
+        "1m",
+        "5m",
+        "15m",
+        "30m",
+        "1h",
+        "2h",
+        "1d"
+      ]
+    },
+    "timezone": "",
+    "title": "Promitor Scraped Metrics (StatsD)",
+    "uid": "qes7mveZz",
+    "variables": {
+      "list": []
+    },
+    "version": 1
+  }

config/grafana/dashboards.yml

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+apiVersion: 1
+
+providers:
+  # <string> an unique provider name
+- name: 'Metrics'
+  # <int> org id. will default to orgId 1 if not specified
+  orgId: 1
+  # <string, required> name of the dashboard folder. Required
+  folder: 'Promitor'
+  # <string> folder UID. will be automatically generated if not specified
+  folderUid: ''
+  # <string, required> provider type. Required
+  type: file
+  # <bool> disable dashboard deletion
+  disableDeletion: false
+  # <bool> enable dashboard editing
+  editable: true
+  # <int> how often Grafana will scan for changed dashboards
+  updateIntervalSeconds: 10
+  # <bool> allow updating provisioned dashboards from the UI
+  allowUiUpdates: false
+  options:
+    # <string, required> path to dashboard files on disk. Required
+    path: /var/lib/grafana/dashboards

config/grafana/datasources.yml

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+# config file version
+apiVersion: 1
+
+# list of datasources to insert/update depending
+# what's available in the database
+datasources:
+  # <string, required> name of the datasource. Required
+- name: Graphite
+  # <string, required> datasource type. Required
+  type: graphite
+  # <string, required> access mode. proxy or direct (Server or Browser in the UI). Required
+  access: proxy
+  # <int> org id. will default to orgId 1 if not specified
+  orgId: 1
+  # <string> custom UID which can be used to reference this datasource in other parts of the configuration, if not specified will be generated automatically
+  uid: graphite
+  # <string> url
+  url: http://graphite