Grafana dashboard: Envoy Proxy
Description: Envoy proxy monitoring Dashboard with cluster and host level templates. 

Using envoy's own stats in prometheus metrics format.

sample config,
``` 
  - job_name: 'envoy'
    metrics_path: '/stats'
    params:
        format: ['prometheus']
    scrape_interval: 15s
    scrape_timeout: 15s
    <node_config_here>
```

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    {
      "name": "DS_PROMETHEUS-04",
      "label": "prometheus-04",
      "description": "Prometheus DB source",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__requires": [
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      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "5.0.2"
    },
    {
      "type": "panel",
      "id": "graph",
      "name": "Graph",
      "version": "5.0.0"
    },
    {
      "type": "datasource",
      "id": "prometheus",
      "name": "Prometheus",
      "version": "5.0.0"
    },
    {
      "type": "panel",
      "id": "singlestat",
      "name": "Singlestat",
      "version": "5.0.0"
    }
  ],
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "gnetId": 6693,
  "graphTooltip": 0,
  "id": null,
  "iteration": 1530162066466,
  "links": [],
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      "colorValue": true,
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        "#299c46"
      ],
      "datasource": "${DS_PROMETHEUS-04}",
      "format": "none",
      "gauge": {
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        "minValue": 0,
        "show": true,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
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        "w": 5,
        "x": 0,
        "y": 0
      },
      "id": 9,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
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        {
          "name": "range to text",
          "value": 2
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      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
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      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
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      ],
      "sparkline": {
        "fillColor": "rgba(31, 118, 189, 0.18)",
        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": false
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "sum(envoy_server_live)",
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          "interval": "",
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          "legendFormat": "",
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      ],
      "thresholds": "1,2",
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      "colorValue": true,
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      "datasource": "${DS_PROMETHEUS-04}",
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        "thresholdMarkers": true
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      "gridPos": {
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      "rangeMaps": [
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        "lineColor": "rgb(31, 120, 193)",
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      },
      "tableColumn": "",
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          "intervalFactor": 1,
          "legendFormat": "",
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      "thresholds": "",
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      "datasource": "${DS_PROMETHEUS-04}",
      "format": "decbytes",
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        "thresholdLabels": false,
        "thresholdMarkers": true
      },
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        "y": 0
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      "prefix": "",
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        "lineColor": "rgb(31, 120, 193)",
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      },
      "tableColumn": "",
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        {
          "expr": "SUM(envoy_server_memory_heap_size)",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "thresholds": "",
      "title": "Heap Size",
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      "valueFontSize": "80%",
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      "datasource": "${DS_PROMETHEUS-04}",
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        "minValue": 0,
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        "thresholdMarkers": true
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        {
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          "expr": "irate(envoy_cluster_upstream_cx_rx_bytes_total{envoy_cluster_name=~\"$cluster\",host=~\"$hosts\"}[1m])",
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          "expr": "irate(envoy_cluster_upstream_cx_tx_bytes_total{envoy_cluster_name=~\"$cluster\",host=~\"$hosts\"}[1m])",
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          "refId": "B"
        }
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      "timeFrom": null,
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        "sort": 0,
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          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ]
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS-04}",
      "fill": 1,
      "gridPos": {
        "h": 7,
        "w": 12,
        "x": 12,
        "y": 19
      },
      "id": 17,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "irate(envoy_http_downstream_cx_rx_bytes_total{envoy_http_conn_manager_prefix=~\"$cluster\",host=~\"$hosts\"}[1m])",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "{{zone}} ({{host}}) - in",
          "refId": "A"
        },
        {
          "expr": "irate(envoy_http_downstream_cx_tx_bytes_total{envoy_http_conn_manager_prefix=~\"$cluster\",host=~\"$hosts\"}[1m])",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "{{zone}} ({{host}}) - out",
          "refId": "B"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "Downstream Network Traffic",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "decbytes",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ]
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS-04}",
      "fill": 1,
      "gridPos": {
        "h": 7,
        "w": 24,
        "x": 0,
        "y": 26
      },
      "id": 7,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "sum(envoy_cluster_membership_healthy{envoy_cluster_name=\"$cluster\",host=~\"$hosts\"})/count(envoy_cluster_membership_healthy{envoy_cluster_name=\"$cluster\",host=~\"$hosts\"})",
          "format": "time_series",
          "intervalFactor": 2,
          "legendFormat": "healthy",
          "refId": "A"
        },
        {
          "expr": "sum(envoy_cluster_membership_total{envoy_cluster_name=\"$cluster\",host=~\"$hosts\"})/count(envoy_cluster_membership_total{envoy_cluster_name=\"$cluster\",host=~\"$hosts\"})",
          "format": "time_series",
          "intervalFactor": 2,
          "legendFormat": "total",
          "refId": "B"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "Downstream members",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ]
    }
  ],
  "refresh": "30s",
  "schemaVersion": 16,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": [
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_PROMETHEUS-04}",
        "hide": 0,
        "includeAll": false,
        "label": "Cluster",
        "multi": false,
        "name": "cluster",
        "options": [],
        "query": "label_values(envoy_cluster_upstream_cx_total, envoy_cluster_name)",
        "refresh": 1,
        "regex": "",
        "sort": 1,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      },
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_PROMETHEUS-04}",
        "hide": 0,
        "includeAll": true,
        "label": "Hosts",
        "multi": true,
        "name": "hosts",
        "options": [],
        "query": "label_values(envoy_cluster_upstream_cx_total{envoy_cluster_name=\"$cluster\"}, host)",
        "refresh": 1,
        "regex": "",
        "sort": 1,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-15m",
    "to": "now"
  },
  "timepicker": {
    "refresh_intervals": [
      "5s",
      "10s",
      "30s",
      "1m",
      "5m",
      "15m",
      "30m",
      "1h",
      "2h",
      "1d"
    ],
    "time_options": [
      "5m",
      "15m",
      "1h",
      "6h",
      "12h",
      "24h",
      "2d",
      "7d",
      "30d"
    ]
  },
  "timezone": "",
  "title": "Envoy Proxy",
  "uid": "000000003",
  "version": 45,
  "description": "Envoy proxy monitoring Dashboard with cluster and host level templates. "
}