RARE/freeRouter - NRPE
Display NREP metrics
`scope:local` to freeRouter node

freeRouter Prometheus configuration: (copy & paste in freeRouter CLI)
```
 metric nrpe command sho nrpe home
 metric nrpe prepend nrpe_
 metric nrpe name 0 name=
 metric nrpe skip 2
 metric nrpe column 1 name state
 metric nrpe column 1 replace false 0
 metric nrpe column 1 replace true 1
 metric nrpe column 2 name asked
 metric nrpe column 3 name time
 metric nrpe column 4 name passed
 metric nrpe column 6 name failed
```
{
  "__inputs": [
    {
      "name": "DS_PROMETHEUS",
      "label": "Prometheus",
      "description": "prometheus metric collector that receives metric from freeRouter control plane",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__requires": [
    {
      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "7.2.0"
    },
    {
      "type": "panel",
      "id": "graph",
      "name": "Graph",
      "version": ""
    },
    {
      "type": "datasource",
      "id": "prometheus",
      "name": "Prometheus",
      "version": "1.0.0"
    },
    {
      "type": "panel",
      "id": "stat",
      "name": "Stat",
      "version": ""
    }
  ],
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "gnetId": 13145,
  "graphTooltip": 0,
  "id": null,
  "iteration": 1602514306943,
  "links": [],
  "panels": [
    {
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {
          "custom": {},
          "mappings": [
            {
              "from": "",
              "id": 0,
              "text": "down",
              "to": "",
              "type": 1,
              "value": "0"
            },
            {
              "from": "",
              "id": 1,
              "text": "up",
              "to": "",
              "type": 1,
              "value": "1"
            }
          ],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "black",
                "value": null
              },
              {
                "color": "red",
                "value": -0.1
              },
              {
                "color": "dark-green",
                "value": 0.1
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 3,
        "w": 4,
        "x": 0,
        "y": 0
      },
      "id": 12,
      "maxPerRow": 12,
      "options": {
        "colorMode": "background",
        "graphMode": "none",
        "justifyMode": "center",
        "orientation": "vertical",
        "reduceOptions": {
          "calcs": [
            "last"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "value"
      },
      "pluginVersion": "7.2.0",
      "repeat": "nrpe_name",
      "repeatDirection": "h",
      "targets": [
        {
          "expr": "nrpe_state{instance=\"$instance\",name=\"$nrpe_name\"}",
          "instant": true,
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "timeFrom": null,
      "timeShift": null,
      "title": "NRPE ${nrpe_name}",
      "type": "stat"
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {
          "custom": {},
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "dark-green",
                "value": null
              }
            ]
          },
          "unit": "none"
        },
        "overrides": []
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 11,
        "w": 12,
        "x": 0,
        "y": 3
      },
      "hiddenSeries": false,
      "id": 3,
      "legend": {
        "alignAsTable": true,
        "avg": false,
        "current": true,
        "max": true,
        "min": true,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "percentage": false,
      "pluginVersion": "7.2.0",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "repeat": "nrpe_name",
      "repeatDirection": "v",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "rate(nrpe_failed{instance=\"$instance\",name=\"$nrpe_name\"}[1m])",
          "interval": "",
          "legendFormat": "Failed",
          "refId": "B"
        },
        {
          "expr": "rate(nrpe_passed{instance=\"$instance\",name=\"$nrpe_name\"}[1m])",
          "interval": "",
          "legendFormat": "Passed",
          "refId": "C"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "${nrpe_name}:failed/passed rate",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "$$hashKey": "object:67",
          "format": "none",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "$$hashKey": "object:68",
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {
          "custom": {},
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "dark-green",
                "value": null
              }
            ]
          },
          "unit": "s"
        },
        "overrides": []
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 11,
        "w": 12,
        "x": 12,
        "y": 3
      },
      "hiddenSeries": false,
      "id": 39,
      "legend": {
        "alignAsTable": true,
        "avg": false,
        "current": true,
        "max": true,
        "min": true,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "percentage": false,
      "pluginVersion": "7.2.0",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "repeat": "nrpe_name",
      "repeatDirection": "v",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "nrpe_time{instance=\"$instance\",name=\"$nrpe_name\"}",
          "hide": false,
          "instant": false,
          "interval": "",
          "legendFormat": "Total",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "${nrpe_name}:time",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "$$hashKey": "object:67",
          "format": "s",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "$$hashKey": "object:68",
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    }
  ],
  "schemaVersion": 26,
  "style": "dark",
  "tags": [
    "[scope:local]"
  ],
  "templating": {
    "list": [
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_PROMETHEUS}",
        "definition": "label_values({__name__=~\"^nrpe_.*\"},instance)",
        "hide": 0,
        "includeAll": false,
        "label": null,
        "multi": false,
        "name": "instance",
        "options": [],
        "query": "label_values({__name__=~\"^nrpe_.*\"},instance)",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      },
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_PROMETHEUS}",
        "definition": "label_values(nrpe_state{instance=\"$instance\"},name)",
        "hide": 0,
        "includeAll": true,
        "label": null,
        "multi": true,
        "name": "nrpe_name",
        "options": [],
        "query": "label_values(nrpe_state{instance=\"$instance\"},name)",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "",
  "title": "RARE/freeRouter - NRPE",
  "uid": "b_eUM55Ga",
  "version": 50,
  "description": "Display NREP metrics"
}