Grafana dashboard: NGINX / API / Host
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
```

{
  "__inputs": [
    {
      "name": "DS_PROMETHEUS-NGINX",
      "label": "Prometheus-Nginx",
      "description": "",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__requires": [
    {
      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "6.2.1"
    },
    {
      "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": 10443,
  "graphTooltip": 0,
  "id": null,
  "iteration": 1561475012433,
  "links": [
    {
      "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",
      "includeVars": true,
      "keepTime": true,
      "tags": [
        "motan"
      ],
      "targetBlank": true,
      "title": "# Motan",
      "type": "dashboards"
    },
    {
      "asDropdown": true,
      "icon": "external link",
      "includeVars": true,
      "keepTime": true,
      "tags": [
        "internal"
      ],
      "targetBlank": true,
      "title": "# Internal",
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  ],
  "panels": [
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      "collapsed": false,
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        "h": 1,
        "w": 24,
        "x": 0,
        "y": 0
      },
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      "panels": [],
      "title": "Overall",
      "type": "row"
    },
    {
      "aliasColors": {},
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      "dashes": false,
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      "fill": 1,
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        "w": 8,
        "x": 0,
        "y": 1
      },
      "id": 128,
      "legend": {
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        "values": true
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      "lines": false,
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          "format": "time_series",
          "hide": false,
          "instant": false,
          "intervalFactor": 2,
          "legendFormat": "4XX - 1min",
          "refId": "A"
        },
        {
          "expr": "sum(increase(nginx_http_request_duration_seconds_count{host=~\"$host\", status=~\"5..\"}[1m])) by(host) ",
          "format": "time_series",
          "hide": false,
          "instant": false,
          "intervalFactor": 2,
          "legendFormat": "5XX - 1min",
          "refId": "B"
        },
        {
          "expr": "sum(increase(nginx_http_request_duration_seconds_count{host=~\"$host\", status=~\"3..\"}[1m])) by(host) ",
          "format": "time_series",
          "hide": false,
          "instant": false,
          "intervalFactor": 2,
          "legendFormat": "3XX - 1min",
          "refId": "C"
        }
      ],
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      "tooltip": {
        "shared": true,
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      "type": "graph",
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        "mode": "time",
        "name": null,
        "show": true,
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      },
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    },
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      },
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        {
          "alias": "Summary",
          "transform": "negative-Y"
        }
      ],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
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        {
          "expr": "sum by (instance) (job:nginx_http_request_duration_seconds:qps_by_instance_host_endpoint_2XX{host=~\"$host\"})",
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          "hide": false,
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      ],
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        "shared": true,
        "sort": 2,
        "value_type": "individual"
      },
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        "show": true,
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      },
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          "format": "short",
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          "show": true
        },
        {
          "format": "short",
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          "show": true
        }
      ],
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      }
    },
    {
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        "x": 16,
        "y": 1
      },
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      },
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          "expr": "job:nginx_http_request_duration_seconds_sum:err_rate_by_host_endpoint{host=~\"$host\"} > 0.01",
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        }
      ],
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        {
          "alias": "Summary",
          "transform": "negative-Y"
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      ],
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        {
          "expr": "sum(job:nginx_http_request_duration_seconds:qps_by_instance_host_endpoint_2XX{host=~\"$host\"})",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 1,
          "legendFormat": "2XX",
          "refId": "A"
        },
        {
          "expr": "sum(job:nginx_http_request_duration_seconds:qps_by_instance_host_status_method_4XX{host=~\"$host\"})",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 1,
          "legendFormat": "4XX",
          "refId": "B"
        },
        {
          "expr": "sum(job:nginx_http_request_duration_seconds:qps_by_instance_host_status_method_5XX{host=~\"$host\"})",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 1,
          "legendFormat": "5XX",
          "refId": "C"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "QPS",
      "tooltip": {
        "shared": true,
        "sort": 2,
        "value_type": "individual"
      },
      "type": "graph",
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        "show": true,
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        "alignLevel": 1
      }
    },
    {
      "aliasColors": {},
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      "dashLength": 10,
      "dashes": false,
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        "w": 8,
        "x": 8,
        "y": 5
      },
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          "alias": "Summary",
          "transform": "negative-Y"
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      ],
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      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "sum(job:nginx_http_request_duration_seconds:qps_by_instance_host_status_method_4XX{host=~\"$host\"}) by (instance)",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 1,
          "legendFormat": "{{instance}}",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "4XX QPS By Instance",
      "tooltip": {
        "shared": true,
        "sort": 2,
        "value_type": "individual"
      },
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        "mode": "time",
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          "show": true
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          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": 1
      }
    },
    {
      "aliasColors": {},
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      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS-NGINX}",
      "fill": 1,
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      },
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      "legend": {
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      },
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          "alias": "QPS",
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          "yaxis": 2
        }
      ],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "job:nginx_http_request_duration_seconds:p999_by_host_2XX{host=~\"[[host]]\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "2XX-P999",
          "refId": "A"
        },
        {
          "expr": "job:nginx_http_request_duration_seconds:p99_by_host_2XX{host=~\"[[host]]\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "2XX-P99",
          "refId": "B"
        },
        {
          "expr": "job:nginx_http_request_duration_seconds:avg_by_host_2XX{host=~\"[[host]]\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "2XX-avg",
          "refId": "C"
        }
      ],
      "thresholds": [],
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      "timeRegions": [],
      "timeShift": null,
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      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
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    },
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      },
      "id": 122,
      "panels": [],
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      "type": "row"
    },
    {
      "columns": [],
      "datasource": "${DS_PROMETHEUS-NGINX}",
      "fontSize": "100%",
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      },
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      "links": [],
      "options": {},
      "pageSize": 10,
      "scroll": false,
      "showHeader": true,
      "sort": {
        "col": 2,
        "desc": true
      },
      "styles": [
        {
          "alias": "Time",
          "dateFormat": "YYYY-MM-DD HH:mm:ss",
          "pattern": "Time",
          "type": "hidden"
        },
        {
          "alias": "",
          "colorMode": null,
          "colors": [
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          ],
          "dateFormat": "YYYY-MM-DD HH:mm:ss",
          "decimals": 2,
          "link": false,
          "linkTargetBlank": true,
          "linkTooltip": "",
          "linkUrl": "",
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          "pattern": "__name__",
          "sanitize": false,
          "thresholds": [],
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        {
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          ],
          "dateFormat": "YYYY-MM-DD HH:mm:ss",
          "decimals": 2,
          "link": true,
          "linkTargetBlank": true,
          "linkTooltip": "点击进入详情",
          "linkUrl": "/d/d9NTw37Wk/api-endpoint?var-host=$host&&var-endpoint=${__cell_1}",
          "mappingType": 1,
          "pattern": "Value",
          "thresholds": [],
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        },
        {
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}