Added graph for Erasure Set Tolerance value (#18472)

Signed-off-by: Shubhendu Ram Tripathi <shubhendu@minio.io>

docs/metrics/prometheus/grafana/minio-dashboard.json

@@ -4540,7 +4540,7 @@
       "fill": 1,
       "fillGradient": 0,
       "gridPos": {
-        "h": 6,
+        "h": 5,
         "w": 6,
         "x": 18,
         "y": 109
@@ -4616,6 +4616,94 @@
       "yaxis": {
         "align": false
       }
+    },
+    {
+      "aliasColors": {},
+      "bars": false,
+      "dashLength": 10,
+      "dashes": false,
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fill": 1,
+      "fillGradient": 0,
+      "gridPos": {
+        "h": 6,
+        "w": 12,
+        "x": 0,
+        "y": 115
+      },
+      "hiddenSeries": false,
+      "id": 94,
+      "legend": {
+        "avg": false,
+        "current": false,
+        "max": false,
+        "min": false,
+        "show": true,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 1,
+      "nullPointMode": "null",
+      "options": {
+        "alertThreshold": true
+      },
+      "percentage": false,
+      "pluginVersion": "10.0.2",
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "exemplar": true,
+          "expr": "minio_cluster_health_erasure_set_tolerance{job=\"$scrape_jobs\"}",
+          "interval": "",
+          "legendFormat": "Pool: {{pool}} Set: {{set}}",
+          "refId": "A"
+        }
+      ],
+      "thresholds": [],
+      "timeRegions": [],
+      "title": "Erasure Set Tolerance",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "mode": "time",
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "$$hashKey": "object:1043",
+          "format": "none",
+          "logBase": 1,
+          "show": true
+        },
+        {
+          "$$hashKey": "object:1044",
+          "format": "short",
+          "logBase": 1,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false
+      }
     }
   ],
   "refresh": "",