Grafana Log Histogram

{
  "id": 8,
  "gridPos": {
    "x": 0,
    "y": 7,
    "w": 23,
    "h": 7
  },
  "type": "timeseries",
  "title": "Log distribution",
  "targets": [
    {
      "refId": "A",
      "datasource": {
        "uid": "P8E80F9AEF21F6940",
        "type": "loki"
      },
      "expr": "sum by (level) (count_over_time({job=~\"$service_id\"} |~ \"$query\" [$__interval]))",
      "legendFormat": "{{ level }}"
    }
  ],
  "options": {
    "tooltip": {
      "mode": "single",
      "sort": "none"
    },
    "legend": {
      "displayMode": "list",
      "placement": "bottom",
      "calcs": []
    }
  },
  "fieldConfig": {
    "defaults": {
      "custom": {
        "drawStyle": "bars",
        "lineInterpolation": "stepBefore",
        "barAlignment": 0,
        "lineWidth": 0,
        "fillOpacity": 100,
        "gradientMode": "none",
        "spanNulls": false,
        "showPoints": "never",
        "pointSize": 5,
        "stacking": {
          "mode": "none",
          "group": "A"
        },
        "axisPlacement": "auto",
        "axisLabel": "",
        "scaleDistribution": {
          "type": "linear"
        },
        "hideFrom": {
          "tooltip": false,
          "viz": false,
          "legend": false
        },
        "thresholdsStyle": {
          "mode": "off"
        }
      },
      "color": {
        "mode": "palette-classic"
      },
      "mappings": [],
      "thresholds": {
        "mode": "absolute",
        "steps": [
          {
            "color": "green",
            "value": null
          }
        ]
      },
      "unit": "none"
    },
    "overrides": [
      {
        "matcher": {
          "id": "byName",
          "options": "debug"
        },
        "properties": [
          {
            "id": "color",
            "value": {
              "mode": "fixed",
              "fixedColor": "blue"
            }
          }
        ]
      },
      {
        "matcher": {
          "id": "byName",
          "options": "error"
        },
        "properties": [
          {
            "id": "color",
            "value": {
              "mode": "fixed",
              "fixedColor": "red"
            }
          }
        ]
      },
      {
        "matcher": {
          "id": "byName",
          "options": "info"
        },
        "properties": [
          {
            "id": "color",
            "value": {
              "mode": "fixed",
              "fixedColor": "green"
            }
          }
        ]
      },
      {
        "matcher": {
          "id": "byName",
          "options": "warning"
        },
        "properties": [
          {
            "id": "color",
            "value": {
              "mode": "fixed",
              "fixedColor": "orange"
            }
          }
        ]
      },
      {
        "matcher": {
          "id": "byRegexp",
          "options": "fatal"
        },
        "properties": [
          {
            "id": "color",
            "value": {
              "mode": "fixed",
              "fixedColor": "dark-red"
            }
          }
        ]
      },
      {
        "matcher": {
          "id": "byRegexp",
          "options": "trace"
        },
        "properties": [
          {
            "id": "color",
            "value": {
              "mode": "fixed",
              "fixedColor": "purple"
            }
          }
        ]
      }
    ]
  },
  "datasource": {
    "uid": "P8E80F9AEF21F6940",
    "type": "loki"
  },
  "maxDataPoints": 100,
  "transformations": [
    {
      "id": "filterFieldsByName",
      "options": {
        "include": {
          "names": [
            "Time",
            "debug",
            "error",
            "info",
            "warning"
          ]
        }
      }
    }
  ],
  "interval": null,
  "description": ""
}