Grafana dashboard: CoreDNS
Description: A dashboard for the CoreDNS DNS server with updated metrics for version 1.7.0+.  Based on the CoreDNS 1.7.0+ dashboard by ejkinger

#### A recommended modification for your own dashboard

The "Requests (upstream)" piechart should be modified to fit your needs.
Edit the panel, go to the "Transform" tab, and exclude (or re-include) any DNS servers from the pie chart that you wish.
This is shown in the last screenshot.

#### Updates

Update 09/26/21
- Fixed "Cache (hitrate)" panel
- Updated graphs to no longer use "missed" metrics

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          "options": {
            "include": {
              "names": [
                "Time",
                "1.0.0.1:853",
                "1.1.1.1:853",
                "8.8.4.4:853",
                "8.8.8.8:853"
              ]
            }
          }
        }
      ],
      "type": "piechart"
    },
    {
      "cacheTimeout": null,
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "decimals": 0,
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "short"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 7,
        "w": 6,
        "x": 18,
        "y": 74
      },
      "id": 53,
      "interval": null,
      "links": [],
      "options": {
        "displayLabels": [],
        "legend": {
          "calcs": [],
          "displayMode": "table",
          "placement": "right",
          "values": [
            "value",
            "percent"
          ]
        },
        "pieType": "pie",
        "reduceOptions": {
          "calcs": [
            "sum"
          ],
          "fields": "",
          "values": false
        },
        "text": {}
      },
      "pluginVersion": "7.5.6",
      "targets": [
        {
          "exemplar": true,
          "expr": "sum(rate(coredns_forward_responses_total{instance=~\"$instance\"}[5m])) by (rcode)",
          "interval": "",
          "intervalFactor": 2,
          "legendFormat": "{{rcode}}",
          "refId": "A",
          "step": 40
        }
      ],
      "timeFrom": null,
      "timeShift": null,
      "title": "Responses (by code)",
      "type": "piechart"
    }
  ],
  "refresh": "5s",
  "schemaVersion": 27,
  "style": "dark",
  "tags": [
    "dns",
    "coredns"
  ],
  "templating": {
    "list": [
      {
        "allValue": ".*",
        "current": {},
        "datasource": "${DS_PROMETHEUS}",
        "definition": "label_values(up{job=\"coredns\"}, instance)",
        "description": null,
        "error": null,
        "hide": 0,
        "includeAll": true,
        "label": "Instance",
        "multi": true,
        "name": "instance",
        "options": [],
        "query": {
          "query": "label_values(up{job=\"coredns\"}, instance)",
          "refId": "StandardVariableQuery"
        },
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 3,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-1h",
    "to": "now"
  },
  "timepicker": {
    "refresh_intervals": [
      "5s",
      "10s",
      "30s",
      "1m",
      "5m",
      "15m",
      "30m",
      "1h",
      "2h",
      "1d"
    ]
  },
  "timezone": "",
  "title": "CoreDNS",
  "uid": "wY4blRMGz",
  "version": 134
}