Upgrade node-exporter-full dashboard to use timeseries panels

... using curl to get latest version from https://grafana.com/grafana/dashboards/1860-node-exporter-full/ and adopting it to use our named Prometheus data source

---

Fixes #178 (closed).

nixos/modules/monitoring/server/grafana-dashboards/meta-monitoring.json

@@ -3,7 +3,10 @@
     "list": [
       {
         "builtIn": 1,
-        "datasource": "-- Grafana --",
+        "datasource": {
+          "type": "datasource",
+          "uid": "grafana"
+        },
         "enable": true,
         "hide": true,
         "iconColor": "rgba(0, 211, 255, 1)",
@@ -61,51 +64,93 @@
         "noDataState": "ok",
         "notifications": []
       },
-      "aliasColors": {},
-      "bars": true,
-      "dashLength": 10,
-      "dashes": false,
       "datasource": {
         "type": "prometheus",
         "uid": "LocalPrometheus"
       },
       "description": "Is Prometheus having problems scraping our instances? Should be zero.",
-      "fill": 1,
-      "fillGradient": 0,
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "bars",
+            "fillOpacity": 100,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "never",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "normal"
+            },
+            "thresholdsStyle": {
+              "mode": "line"
+            }
+          },
+          "decimals": 0,
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "transparent",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 0
+              }
+            ]
+          },
+          "unit": "short"
+        },
+        "overrides": []
+      },
       "gridPos": {
         "h": 8,
         "w": 12,
         "x": 0,
         "y": 0
       },
-      "hiddenSeries": false,
       "id": 6,
-      "legend": {
-        "avg": false,
-        "current": false,
-        "max": false,
-        "min": false,
-        "show": true,
-        "total": false,
-        "values": false
-      },
-      "lines": false,
-      "linewidth": 1,
-      "nullPointMode": "null as zero",
       "options": {
-        "alertThreshold": false
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "multi",
+          "sort": "none"
+        }
       },
-      "percentage": false,
-      "pluginVersion": "8.4.7",
-      "pointradius": 2,
-      "points": false,
-      "renderer": "flot",
-      "seriesOverrides": [],
-      "spaceLength": 10,
-      "stack": true,
-      "steppedLine": false,
+      "pluginVersion": "10.4.6",
       "targets": [
         {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "LocalPrometheus"
+          },
           "exemplar": true,
           "expr": "count by (job, instance) (up == 0)",
           "hide": false,
@@ -114,45 +159,8 @@
           "refId": "A"
         }
       ],
-      "thresholds": [
-        {
-          "colorMode": "critical",
-          "fill": false,
-          "line": false,
-          "op": "gt",
-          "value": 0,
-          "visible": true
-        }
-      ],
-      "timeRegions": [],
       "title": "Scraping failures",
-      "tooltip": {
-        "shared": true,
-        "sort": 0,
-        "value_type": "individual"
-      },
-      "type": "graph",
-      "xaxis": {
-        "mode": "time",
-        "show": true,
-        "values": []
-      },
-      "yaxes": [
-        {
-          "decimals": 0,
-          "format": "short",
-          "logBase": 1,
-          "show": true
-        },
-        {
-          "format": "short",
-          "logBase": 1,
-          "show": true
-        }
-      ],
-      "yaxis": {
-        "align": false
-      }
+      "type": "timeseries"
     },
     {
       "alert": {
@@ -191,6 +199,10 @@
         "noDataState": "no_data",
         "notifications": []
       },
+      "datasource": {
+        "type": "prometheus",
+        "uid": "LocalPrometheus"
+      },
       "description": "Node-Exporter's TextCollector reads in plain text files containing metrics every few minutes. Make sure we're not reporting stale text files as new data - Alert if any of the text files is not getting updated.",
       "fieldConfig": {
         "defaults": {
@@ -198,6 +210,9 @@
             "mode": "palette-classic"
           },
           "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
             "axisLabel": "",
             "axisPlacement": "auto",
             "barAlignment": 0,
@@ -209,6 +224,7 @@
               "tooltip": false,
               "viz": false
             },
+            "insertNulls": false,
             "lineInterpolation": "linear",
             "lineWidth": 1,
             "pointSize": 5,
@@ -254,7 +270,8 @@
         "legend": {
           "calcs": [],
           "displayMode": "list",
-          "placement": "bottom"
+          "placement": "bottom",
+          "showLegend": true
         },
         "tooltip": {
           "mode": "single",
@@ -287,8 +304,7 @@
     }
   ],
   "refresh": false,
-  "schemaVersion": 35,
-  "style": "dark",
+  "schemaVersion": 39,
   "tags": [],
   "templating": {
     "list": []