feat: expose ChainSpec metrics (#10737)

etc/grafana/dashboards/overview.json

@@ -147,7 +147,79 @@
         "orientation": "auto",
         "percentChangeColorMode": "standard",
         "reduceOptions": {
-          "calcs": ["lastNotNull"],
+          "calcs": [
+            "lastNotNull"
+          ],
+          "fields": "",
+          "values": false
+        },
+        "showPercentChange": false,
+        "text": {
+          "valueSize": 20
+        },
+        "textMode": "name",
+        "wideLayout": true
+      },
+      "pluginVersion": "11.1.0",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "editorMode": "builder",
+          "exemplar": false,
+          "expr": "reth_chain_spec{instance=~\"$instance\"}",
+          "instant": true,
+          "legendFormat": "{{name}}",
+          "range": false,
+          "refId": "A"
+        }
+      ],
+      "title": "Chain",
+      "transparent": true,
+      "type": "stat"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "thresholds"
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 3,
+        "w": 2,
+        "x": 3,
+        "y": 1
+      },
+      "id": 240,
+      "options": {
+        "colorMode": "value",
+        "graphMode": "area",
+        "justifyMode": "auto",
+        "orientation": "auto",
+        "percentChangeColorMode": "standard",
+        "reduceOptions": {
+          "calcs": [
+            "lastNotNull"
+          ],
           "fields": "",
           "values": false
         },
@@ -203,8 +275,8 @@
       },
       "gridPos": {
         "h": 3,
-        "w": 6,
-        "x": 3,
+        "w": 5,
+        "x": 5,
         "y": 1
       },
       "id": 192,
@@ -271,8 +343,8 @@
       },
       "gridPos": {
         "h": 3,
-        "w": 3,
-        "x": 9,
+        "w": 2,
+        "x": 10,
         "y": 1
       },
       "id": 193,