Grafana dashboard: NGINX / API / Dashboard
Description: Nginx,OpenResty HTTP API performance monitoring based on Prometheus LUA library

related dashboards
- https://grafana.com/dashboards/10442
- https://grafana.com/dashboards/10443
- https://grafana.com/dashboards/10444
- https://grafana.com/dashboards/10445

please see a complete demo: https://github.com/zrbcool/prometheus-lua-nginx
it can use following to ran a demo quickly
```shell
docker-compose up
```

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      "name": "DS_PROMETHEUS-NGINX",
      "label": "Prometheus-Nginx",
      "description": "",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__requires": [
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      "id": "grafana",
      "name": "Grafana",
      "version": "6.2.1"
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      "type": "panel",
      "id": "graph",
      "name": "Graph",
      "version": ""
    },
    {
      "type": "datasource",
      "id": "prometheus",
      "name": "Prometheus",
      "version": "1.0.0"
    },
    {
      "type": "panel",
      "id": "table",
      "name": "Table",
      "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": 10442,
  "graphTooltip": 0,
  "id": null,
  "iteration": 1561474334753,
  "links": [
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      "asDropdown": true,
      "icon": "external link",
      "keepTime": true,
      "tags": [
        "dashboard"
      ],
      "targetBlank": true,
      "title": "# Dashboard",
      "type": "dashboards"
    },
    {
      "asDropdown": true,
      "icon": "dashboard",
      "includeVars": true,
      "keepTime": true,
      "tags": [
        "http"
      ],
      "targetBlank": true,
      "title": "# HTTP",
      "tooltip": "# Dashboard",
      "type": "dashboards",
      "url": "/d/yCm50nzZz/1-dashboard"
    },
    {
      "asDropdown": true,
      "icon": "external link",
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      "keepTime": true,
      "tags": [
        "motan"
      ],
      "targetBlank": true,
      "title": "# Motan",
      "type": "dashboards"
    },
    {
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      "icon": "external link",
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      "keepTime": true,
      "tags": [
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          "linkTooltip": "点击进入详情",
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          "linkTooltip": "点击进入详情",
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      {
        "allValue": null,
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}