Grafana dashboard: Loki-Promtail
Description: an example for loki and promtail.

An example for Loki and Promtail, more details refer to https://github.com/grafana/loki

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        "h": 9,
        "w": 24,
        "x": 0,
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      },
      "id": 2,
      "legend": {
        "alignAsTable": true,
        "avg": false,
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      "renderer": "flot",
      "seriesOverrides": [],
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "sum (rate(loki_distributor_bytes_received_total[5m]))",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Bytes Receiced",
          "refId": "B"
        },
        {
          "expr": "sum (rate(loki_distributor_lines_received_total[5m]))",
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          "intervalFactor": 1,
          "legendFormat": "Lines Received",
          "refId": "C"
        }
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        {
          "alias": "lag",
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      ],
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "sum (rate(promtail_read_bytes_total[5m]))",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 1,
          "legendFormat": "read",
          "refId": "B"
        },
        {
          "expr": "sum (rate(promtail_sent_bytes_total[5m]))",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 1,
          "legendFormat": "sent",
          "refId": "C"
        },
        {
          "expr": "sum (rate(promtail_encoded_bytes_total[5m]))",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 1,
          "legendFormat": "encoded",
          "refId": "D"
        },
        {
          "expr": "sum(promtail_file_bytes_total - promtail_read_bytes_total)",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "lag",
          "refId": "A"
        }
      ],
      "thresholds": [],
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      "timeShift": null,
      "title": "Promtail",
      "tooltip": {
        "shared": true,
        "sort": 2,
        "value_type": "individual"
      },
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        {
          "expr": "promtail_file_bytes_total - promtail_read_bytes_total > 100000",
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          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "{{path}}",
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        },
        {
          "expr": "promtail_file_bytes_total - promtail_read_bytes_total < -100000",
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  ],
  "refresh": "5s",
  "schemaVersion": 18,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": []
  },
  "time": {
    "from": "now-12h",
    "to": "now"
  },
  "timepicker": {
    "refresh_intervals": [
      "5s",
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  "timezone": "",
  "title": "Loki-Promtail",
  "uid": "htcadXCiz",
  "version": 1,
  "description": "an example for loki and promtail."
}