Add gauge caps for singlestat panel.

Change-Id: Ic87e610cff0f2389464f8d744d7853a369939dc6

grafana_dashboards/schema/panel/singlestat.py

@@ -39,6 +39,14 @@ class Singlestat(Base):
             v.Required('show', default=False): v.All(bool),
         }
 
+        gauge = {
+            v.Required('maxValue'): v.All(int),
+            v.Required('minValue'): v.Any(int),
+            v.Required('show', default=False): v.All(bool),
+            v.Required('thresholdLabels', default=False): v.All(bool),
+            v.Required('thresholdMarkers', default=False): v.All(bool),
+        }
+
         singlestat = {
             v.Required('colorBackground', default=False): v.All(bool),
             v.Required('colorValue', default=False): v.All(bool),
@@ -64,6 +72,7 @@ class Singlestat(Base):
                 'avg', 'current', 'max', 'min', 'total'),
             v.Optional('datasource'): v.All(str),
             v.Optional('decimals'): v.All(int, v.Range(min=0, max=12)),
+            v.Optional('gauge'): gauge,
             v.Optional('hideTimeOverride'): v.All(bool),
             v.Optional('timeFrom'): v.All(v.Match(r'[1-9]+[0-9]*[smhdw]')),
             v.Optional('timeShift'): v.All(v.Match(r'[1-9]+[0-9]*[smhdw]')),

tests/schema/fixtures/dashboard-0017.json

@@ -12,6 +12,13 @@
                             "colorValue": false,
                             "editable": true,
                             "error": false,
+                            "gauge": {
+                                "maxValue": 100,
+                                "minValue": 0,
+                                "show": true,
+                                "thresholdLabels": false,
+                                "thresholdMarkers": true
+                            },
                             "hideTimeOverride": true,
                             "maxDataPoints": 100,
                             "postfix": "",

tests/schema/fixtures/dashboard-0017.yaml

@@ -9,3 +9,9 @@ dashboard:
             timeFrom: 10d
             timeShift: 1h
             hideTimeOverride: true
+            gauge:
+               maxValue: 100
+               minValue: 0
+               show: true
+               thresholdLabels: false
+               thresholdMarkers: true