Grafana dashboard: linux-node-exporter
Description: Prometheus for system metrics. 
Load, CPU, RAM, network, process ... 

You can add variables like dc(datacenter)/project/service_name.. from prometheus tag.
If there is no variables, it is also valid using default instance variable.

{
  "__inputs": [
    {
      "name": "DS_PROMETHEUS-NODE",
      "label": "Prometheus-Node",
      "description": "Prometheus",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__requires": [
    {
      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "5.1.3"
    },
    {
      "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": "${DS_PROMETHEUS-NODE}",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "limit": 100,
        "name": "Annotations & Alerts",
        "showIn": 0,
        "type": "dashboard"
      },
      {
        "datasource": "${DS_PROMETHEUS-NODE}",
        "enable": false,
        "expr": "ALERTS{alias=\"$host\", alertstate=\"firing\"}",
        "iconColor": "rgb(252, 5, 0)",
        "name": "Alert",
        "showIn": 0,
        "tagKeys": "severity",
        "textFormat": "{{ alias }} : {{alertstate}}",
        "titleFormat": "{{ alertname }}"
      },
      {
        "datasource": "${DS_PROMETHEUS-NODE}",
        "enable": false,
        "expr": "ALERTS{alias=\"$host\",alertstate=\"pending\"}",
        "iconColor": "rgb(228, 242, 9)",
        "name": "Warning",
        "showIn": 0,
        "tagKeys": "severity",
        "textFormat": "{{ alias }} : {{ alertstate }}",
        "titleFormat": "{{ alertname }}"
      }
    ]
  },
  "description": "Prometheus for system metrics. \r\nLoad, CPU, RAM, network, process ... ",
  "editable": true,
  "gnetId": 6490,
  "graphTooltip": 1,
  "id": null,
  "iteration": 1528877704085,
  "links": [],
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      "datasource": "${DS_PROMETHEUS-NODE}",
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      "editable": true,
      "error": false,
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      "gauge": {
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        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
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        "w": 6,
        "x": 0,
        "y": 0
      },
      "height": "50px",
      "id": 19,
      "interval": null,
      "links": [],
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      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "s",
      "postfixFontSize": "80%",
      "prefix": "",
      "prefixFontSize": "80%",
      "rangeMaps": [
        {
          "from": "null",
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          "to": "null"
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      ],
      "sparkline": {
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": false
      },
      "tableColumn": "",
      "targets": [
        {
          "calculatedInterval": "10m",
          "datasourceErrors": {},
          "errors": {},
          "expr": "node_time{instance=\"$host\"} - node_boot_time{instance=\"$host\"}",
          "format": "time_series",
          "interval": "5m",
          "intervalFactor": 1,
          "legendFormat": "",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22node_time%7Balias%3D%5C%22%24host%5C%22%7D%20-%20node_boot_time%7Balias%3D%5C%22%24host%5C%22%7D%22%2C%22range_input%22%3A%2243200s%22%2C%22end_input%22%3A%222015-9-18%2013%3A25%22%2C%22step_input%22%3A%22%22%2C%22tab%22%3A0%7D%5D",
          "refId": "A",
          "step": 300
        }
      ],
      "thresholds": "300,3600",
      "title": "System Uptime",
      "transparent": false,
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": false,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(237, 129, 40, 0.89)",
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      ],
      "datasource": "${DS_PROMETHEUS-NODE}",
      "editable": true,
      "error": false,
      "format": "none",
      "gauge": {
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        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 3,
        "w": 6,
        "x": 6,
        "y": 0
      },
      "height": "55px",
      "id": 25,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
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        }
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      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "80%",
      "rangeMaps": [
        {
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": false
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "count(node_cpu{mode=\"user\", instance=\"$host\"})",
          "format": "time_series",
          "interval": "5m",
          "intervalFactor": 1,
          "refId": "A",
          "step": 300
        }
      ],
      "thresholds": "",
      "title": "Virtual CPUs",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
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      "valueName": "current"
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      "cacheTimeout": null,
      "colorBackground": false,
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      "colors": [
        "rgba(245, 54, 54, 0.9)",
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      ],
      "datasource": "${DS_PROMETHEUS-NODE}",
      "decimals": 2,
      "editable": true,
      "error": false,
      "format": "bytes",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
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        "w": 6,
        "x": 12,
        "y": 0
      },
      "height": "55px",
      "id": 26,
      "interval": null,
      "links": [],
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      "nullPointMode": "connected",
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      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "80%",
      "rangeMaps": [
        {
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": false
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "node_memory_MemFree{instance=\"$host\"}",
          "format": "time_series",
          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "",
          "metric": "node_memory_MemAvailable",
          "refId": "A",
          "step": 300
        }
      ],
      "thresholds": "",
      "title": "RAM Available",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
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      ],
      "valueName": "current"
    },
    {
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      "colorBackground": false,
      "colorValue": true,
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        "rgba(50, 172, 45, 0.97)",
        "rgba(237, 129, 40, 0.89)",
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      ],
      "datasource": "${DS_PROMETHEUS-NODE}",
      "decimals": 0,
      "editable": true,
      "error": false,
      "format": "percent",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
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        "thresholdLabels": false,
        "thresholdMarkers": true
      },
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        "x": 18,
        "y": 0
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      "height": "50px",
      "id": 9,
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      },
      "tableColumn": "",
      "targets": [
        {
          "calculatedInterval": "10m",
          "datasourceErrors": {},
          "errors": {},
          "expr": "((node_memory_MemFree{instance=\"$host\"} + node_memory_Buffers{instance=\"$host\"} + node_memory_Cached{instance=\"$host\"})) / node_memory_MemTotal{instance=\"$host\"} * 100",
          "format": "time_series",
          "interval": "5m",
          "intervalFactor": 1,
          "legendFormat": "",
          "metric": "node_mem",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22(node_memory_MemFree%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Buffers%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Cached%7Balias%3D%5C%22%24host%5C%22%7D)%20%2F%20node_memory_MemTotal%7Balias%3D%5C%22%24host%5C%22%7D%20*%20100%22%2C%22range_input%22%3A%2243201s%22%2C%22end_input%22%3A%222015-9-15%2013%3A54%22%2C%22step_input%22%3A%22%22%2C%22tab%22%3A0%7D%5D",
          "refId": "A",
          "step": 300
        }
      ],
      "thresholds": "",
      "title": "Memory Available",
      "transparent": false,
      "type": "singlestat",
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      "valueMaps": [],
      "valueName": "current"
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS-NODE}",
      "decimals": 2,
      "editable": true,
      "error": false,
      "fill": 2,
      "grid": {},
      "gridPos": {
        "h": 7,
        "w": 24,
        "x": 0,
        "y": 3
      },
      "height": "260px",
      "id": 2,
      "legend": {
        "alignAsTable": true,
        "avg": true,
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        "hideEmpty": false,
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      },
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      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": true,
      "steppedLine": false,
      "targets": [
        {
          "calculatedInterval": "2s",
          "datasourceErrors": {},
          "errors": {},
          "expr": "sum(irate(node_cpu{instance=\"$host\"}[5m])) by (mode) * 100 /  count(node_cpu{ instance=\"$host\"}) by (mode)",
          "format": "time_series",
          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "{{ mode }}",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22sum(rate(node_cpu%7Balias%3D%5C%22%24host%5C%22%7D%5B%24interval%5D))%20by%20(mode)%20*%20100%22%2C%22range_input%22%3A%223600s%22%2C%22end_input%22%3A%222015-10-22%2015%3A27%22%2C%22step_input%22%3A%22%22%2C%22stacked%22%3Atrue%2C%22tab%22%3A0%7D%5D",
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          "step": 20
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "CPU Usage",
      "tooltip": {
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        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
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        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
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          "label": "",
          "logBase": 1,
          "max": 100,
          "min": 0,
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        },
        {
          "format": "short",
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          "min": 0,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS-NODE}",
      "decimals": 2,
      "editable": true,
      "error": false,
      "fill": 2,
      "grid": {},
      "gridPos": {
        "h": 7,
        "w": 24,
        "x": 0,
        "y": 10
      },
      "id": 18,
      "legend": {
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        "hideEmpty": false,
        "max": true,
        "min": true,
        "rightSide": true,
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        "sortDesc": true,
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        "values": true
      },
      "lines": true,
      "linewidth": 2,
      "links": [],
      "nullPointMode": "null",
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [
        {
          "alias": "Load 1m",
          "color": "#E24D42"
        },
        {
          "alias": "Load 5m",
          "color": "#E0752D"
        },
        {
          "alias": "Load 15m",
          "color": "#E5AC0E"
        }
      ],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "calculatedInterval": "10s",
          "datasourceErrors": {},
          "errors": {},
          "expr": "node_load1{instance=\"$host\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Load 1m",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22node_load1%7Balias%3D%5C%22%24host%5C%22%7D%22%2C%22range_input%22%3A%223601s%22%2C%22end_input%22%3A%222015-10-22%2015%3A27%22%2C%22step_input%22%3A%22%22%2C%22stacked%22%3Afalse%2C%22tab%22%3A0%7D%5D",
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          "step": 20,
          "target": ""
        },
        {
          "calculatedInterval": "10s",
          "datasourceErrors": {},
          "errors": {},
          "expr": "node_load5{instance=\"$host\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Load 5m",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22node_load5%7Balias%3D%5C%22%24host%5C%22%7D%22%2C%22range_input%22%3A%223600s%22%2C%22end_input%22%3A%222015-10-22%2015%3A27%22%2C%22step_input%22%3A%22%22%2C%22stacked%22%3Afalse%2C%22tab%22%3A0%7D%5D",
          "refId": "B",
          "step": 20,
          "target": ""
        },
        {
          "calculatedInterval": "10s",
          "datasourceErrors": {},
          "errors": {},
          "expr": "node_load15{instance=\"$host\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Load 15m",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22node_load15%7Balias%3D%5C%22%24host%5C%22%7D%22%2C%22range_input%22%3A%223600s%22%2C%22end_input%22%3A%222015-10-22%2015%3A27%22%2C%22step_input%22%3A%22%22%2C%22stacked%22%3Afalse%2C%22tab%22%3A0%7D%5D",
          "refId": "C",
          "step": 20,
          "target": ""
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "Load Average",
      "tooltip": {
        "msResolution": false,
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "transparent": false,
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
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          "logBase": 1,
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      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS-NODE}",
      "decimals": 2,
      "editable": true,
      "error": false,
      "fill": 6,
      "grid": {},
      "gridPos": {
        "h": 8,
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        "x": 0,
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      },
      "height": "",
      "id": 6,
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      "lines": true,
      "linewidth": 2,
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      "pointradius": 5,
      "points": false,
      "renderer": "flot",
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        {
          "alias": "Used",
          "color": "#0A437C"
        },
        {
          "alias": "Available",
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        {
          "alias": "Total",
          "color": "#052B51",
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      "stack": true,
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        {
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          "errors": {},
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          "legendFormat": "Total",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22node_memory_MemFree%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Buffers%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Cached%7Balias%3D%5C%22%24host%5C%22%7D%22%2C%22range_input%22%3A%22900s%22%2C%22end_input%22%3A%222015-10-22%2015%3A25%22%2C%22step_input%22%3A%22%22%2C%22stacked%22%3Atrue%2C%22tab%22%3A0%7D%5D",
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          "step": 60,
          "target": ""
        },
        {
          "calculatedInterval": "2s",
          "datasourceErrors": {},
          "errors": {},
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      "stack": false,
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      "targets": [
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          ],
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    },
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          "legendFormat": "{{ device }}",
          "metric": "node_disk_io_now",
          "metrics": [
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          ],
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        {
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      ],
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    },
    {
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      "datasource": "${DS_PROMETHEUS-NODE}",
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      "title": "network card drop && error",
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      },
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          ],
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    "prometheus",
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        "includeAll": true,
        "label": "DC:",
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        "name": "DC",
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        "datasource": "${DS_PROMETHEUS-NODE}",
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        "label": "service_name:",
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    "refresh_intervals": [
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    "status": "Stable",
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      "15m",
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      "2d",
      "7d",
      "30d"
    ],
    "type": "timepicker"
  },
  "timezone": "browser",
  "title": "linux-node-exporter",
  "uid": "000000010",
  "version": 17
}