Grafana panel json for monitoring Eth node chainhead status via graph-node prometheus endpoint

ethNodeChainheadMonitoring.json

{
  "id": 50,
  "gridPos": {
    "h": 8,
    "w": 12,
    "x": 12,
    "y": 0
  },
  "type": "timeseries",
  "title": "Ethereum Chain head (rate of block number change)",
  "alert": {
    "alertRuleTags": {},
    "conditions": [
      {
        "evaluator": {
          "params": [
            0.001
          ],
          "type": "lt"
        },
        "operator": {
          "type": "and"
        },
        "query": {
          "params": [
            "A",
            "5m",
            "now"
          ]
        },
        "reducer": {
          "params": [],
          "type": "avg"
        },
        "type": "query"
      }
    ],
    "executionErrorState": "alerting",
    "for": "5m",
    "frequency": "1m",
    "handler": 1,
    "message": "Critical warning - Graph Ethereum archive nodes have fallen off the chainhead - check health of nodes immediately",
    "name": "Ethereum Chain head (rate of block number change) alert",
    "noDataState": "alerting",
    "notifications": []
  },
  "datasource": "Prometheus_graph-indexer-0",
  "thresholds": [
    {
      "value": 0.001,
      "op": "lt",
      "visible": true,
      "colorMode": "critical"
    }
  ],
  "pluginVersion": "8.0.0",
  "description": "If rate of change falls to zero (RED), the eth nodes are having issues keeping to the chainhead",
  "fieldConfig": {
    "defaults": {
      "custom": {
        "drawStyle": "line",
        "lineInterpolation": "linear",
        "barAlignment": 0,
        "lineWidth": 1,
        "fillOpacity": 0,
        "gradientMode": "none",
        "spanNulls": false,
        "showPoints": "auto",
        "pointSize": 4,
        "stacking": {
          "mode": "none",
          "group": "A"
        },
        "axisPlacement": "auto",
        "axisLabel": "",
        "scaleDistribution": {
          "type": "linear"
        },
        "hideFrom": {
          "tooltip": false,
          "viz": false,
          "legend": false
        },
        "thresholdsStyle": {
          "mode": "line"
        }
      },
      "color": {
        "mode": "palette-classic"
      },
      "thresholds": {
        "mode": "absolute",
        "steps": [
          {
            "color": "green",
            "value": null
          },
          {
            "color": "red",
            "value": 0.01
          }
        ]
      },
      "mappings": [],
      "unit": "short"
    },
    "overrides": []
  },
  "options": {
    "tooltip": {
      "mode": "single"
    },
    "legend": {
      "displayMode": "list",
      "placement": "bottom",
      "calcs": []
    }
  },
  "targets": [
    {
      "exemplar": true,
      "expr": "rate(ethereum_chain_head_number[5m])",
      "format": "time_series",
      "instant": false,
      "interval": "",
      "legendFormat": "{{job}}",
      "refId": "A"
    }
  ],
  "timeFrom": null,
  "timeShift": null
}