add player-online metric via RCON

dashboard/server-stats.json

@@ -27,6 +27,12 @@
       "id": "prometheus",
       "name": "Prometheus",
       "version": "1.0.0"
+    },
+    {
+      "type": "panel",
+      "id": "table",
+      "name": "Table",
+      "version": ""
     }
   ],
   "annotations": {
@@ -212,8 +218,8 @@
           "format": "short",
           "label": null,
           "logBase": 1,
-          "max": null,
-          "min": null,
+          "max": "20",
+          "min": "0",
           "show": true
         },
         {
@@ -401,8 +407,63 @@
         "align": false,
         "alignLevel": null
       }
+    },
+    {
+      "columns": [],
+      "datasource": "${DS_PROMETHEUS}",
+      "fontSize": "100%",
+      "gridPos": {
+        "h": 6,
+        "w": 3,
+        "x": 0,
+        "y": 17
+      },
+      "id": 9,
+      "options": {},
+      "pageSize": null,
+      "showHeader": true,
+      "sort": {
+        "col": 0,
+        "desc": true
+      },
+      "styles": [
+        {
+          "alias": "Time",
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "pattern": "Time",
+          "type": "hidden"
+        },
+        {
+          "alias": "",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "decimals": 2,
+          "pattern": "/Value/",
+          "thresholds": [],
+          "type": "hidden",
+          "unit": "short"
+        }
+      ],
+      "targets": [
+        {
+          "expr": "player_online",
+          "instant": true,
+          "legendFormat": "{{player}}",
+          "refId": "A"
+        }
+      ],
+      "timeFrom": null,
+      "timeShift": null,
+      "title": "Players Online",
+      "transform": "timeseries_to_rows",
+      "type": "table"
     }
   ],
+  "refresh": "5s",
   "schemaVersion": 20,
   "style": "dark",
   "tags": [],
@@ -410,12 +471,12 @@
     "list": []
   },
   "time": {
-    "from": "now-6h",
+    "from": "now-30m",
     "to": "now"
   },
   "timepicker": {},
   "timezone": "",
   "title": "Minecraft Server",
   "uid": "LhW0bV0Wz",
-  "version": 3
+  "version": 7
 }