Add nova instance creation time panels

Change-Id: I79d2bcc33a4bceb31efa235e89e141751ca05853
diff --git a/nova/files/grafana_dashboards/nova_prometheus.json b/nova/files/grafana_dashboards/nova_prometheus.json
index a4e07d2..2e6a249 100644
--- a/nova/files/grafana_dashboards/nova_prometheus.json
+++ b/nova/files/grafana_dashboards/nova_prometheus.json
@@ -2499,6 +2499,182 @@
               "show": true
             }
           ]
+        },
+        {
+          "cacheTimeout": null,
+          "colorBackground": false,
+          "colorValue": false,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "datasource": "prometheus",
+          "decimals": null,
+          "format": "s",
+          "gauge": {
+            "maxValue": 100,
+            "minValue": 0,
+            "show": false,
+            "thresholdLabels": false,
+            "thresholdMarkers": true
+          },
+          "id": 52,
+          "interval": null,
+          "links": [],
+          "mappingType": 1,
+          "mappingTypes": [
+            {
+              "name": "value to text",
+              "value": 1
+            },
+            {
+              "name": "range to text",
+              "value": 2
+            }
+          ],
+          "maxDataPoints": 100,
+          "nullPointMode": "connected",
+          "nullText": null,
+          "postfix": "",
+          "postfixFontSize": "50%",
+          "prefix": "",
+          "prefixFontSize": "50%",
+          "rangeMaps": [
+            {
+              "from": "null",
+              "text": "N/A",
+              "to": "null"
+            }
+          ],
+          "span": 2,
+          "sparkline": {
+            "fillColor": "rgba(31, 118, 189, 0.18)",
+            "full": false,
+            "lineColor": "rgb(31, 120, 193)",
+            "show": false
+          },
+          "tableColumn": "",
+          "targets": [
+            {
+              "expr": "avg(openstack_nova_instance_creation_time)",
+              "format": "time_series",
+              "hide": false,
+              "intervalFactor": 2,
+              "legendFormat": "",
+              "metric": "",
+              "refId": "A",
+              "step": 60
+            }
+          ],
+          "thresholds": "",
+          "title": "Instance creation time (average)",
+          "type": "singlestat",
+          "valueFontSize": "80%",
+          "valueMaps": [
+            {
+              "op": "=",
+              "text": "N/A",
+              "value": "null"
+            }
+          ],
+          "valueName": "min"
+        },
+        {
+          "aliasColors": {
+            "Avg": "#6ED0E0"
+          },
+          "bars": false,
+          "dashLength": 10,
+          "dashes": false,
+          "datasource": "prometheus",
+          "fill": 1,
+          "id": 53,
+          "legend": {
+            "avg": false,
+            "current": false,
+            "hideEmpty": false,
+            "hideZero": false,
+            "max": false,
+            "min": false,
+            "show": true,
+            "total": false,
+            "values": false
+          },
+          "lines": true,
+          "linewidth": 1,
+          "links": [],
+          "nullPointMode": "null as zero",
+          "percentage": false,
+          "pointradius": 5,
+          "points": false,
+          "renderer": "flot",
+          "seriesOverrides": [],
+          "spaceLength": 10,
+          "span": 10,
+          "stack": false,
+          "steppedLine": false,
+          "targets": [
+            {
+              "expr": "avg(openstack_nova_instance_creation_time)",
+              "format": "time_series",
+              "intervalFactor": 2,
+              "legendFormat": "Avg",
+              "refId": "A",
+              "step": 4
+            },
+            {
+              "expr": "min(openstack_nova_instance_creation_time)",
+              "format": "time_series",
+              "intervalFactor": 2,
+              "legendFormat": "Min",
+              "refId": "B",
+              "step": 4
+            },
+            {
+              "expr": "max(openstack_nova_instance_creation_time)",
+              "format": "time_series",
+              "intervalFactor": 2,
+              "legendFormat": "Max",
+              "refId": "C",
+              "step": 4
+            }
+          ],
+          "thresholds": [],
+          "timeFrom": null,
+          "timeShift": null,
+          "title": "Instances",
+          "tooltip": {
+            "shared": true,
+            "sort": 0,
+            "value_type": "individual"
+          },
+          "type": "graph",
+          "xaxis": {
+            "buckets": null,
+            "mode": "time",
+            "name": null,
+            "show": true,
+            "values": []
+          },
+          "yaxes": [
+            {
+              "format": "s",
+              "label": "Creation time",
+              "logBase": 1,
+              "max": null,
+              "min": null,
+              "show": true
+            },
+            {
+              "format": "short",
+              "label": "",
+              "logBase": 1,
+              "max": null,
+              "min": null,
+              "show": true
+            }
+          ]
         }
       ],
       "repeat": null,