[SOLVED] Grafana/Loki - Show log volume based on level in dashboard

Working with Grafana 12 Loki, I would like to show the "log volume" graph in a dashboard. That graph is shown in the Explorer view for Loki.

How can I make a barchart to show stacks with errors in red, warnings in yellow and info in green? For example:

See the visualization below, this is what i have: the bars show counts for the errors, warnings and info's. Nice. But all 3 parts are shown in green.

The timeline of 5 minutes and 6 hours. I just chose to get visitable data. The log generating apps did not run for some time. I will improve that one later.

I tried all kinds of ways using the panel options:

Field overrides, see the example in the screen shot.
Adding mapping values.
Stacking I set to different values, by default on "normal" (see below).
Threshold values,
Any other panel option, etc.

Nothing helped so far. I hope you can help.

When asked for it, this is the JSON model:

{
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": {
          "type": "grafana",
          "uid": "-- Grafana --"
        },
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "fiscalYearStartMonth": 0,
  "graphTooltip": 0,
  "id": 4,
  "links": [],
  "panels": [
    {
      "datasource": {
        "type": "loki",
        "uid": "P8E80F9AEF21F6940"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "custom": {
            "axisBorderShow": false,
            "axisCenteredZero": false,
            "axisColorMode": "series",
            "axisGridShow": true,
            "axisLabel": "",
            "axisPlacement": "auto",
            "fillOpacity": 80,
            "gradientMode": "scheme",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "lineWidth": 1,
            "scaleDistribution": {
              "type": "linear"
            },
            "thresholdsStyle": {
              "mode": "off"
            }
          },
          "mappings": [
            {
              "options": {
                "ERROR": {
                  "color": "red",
                  "index": 0,
                  "text": "Error"
                }
              },
              "type": "value"
            }
          ],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green"
              }
            ]
          },
          "unit": "none"
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "Value"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "red",
                  "mode": "fixed"
                }
              },
              {
                "id": "custom.axisColorMode",
                "value": "text"
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "WARN"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "yellow",
                  "mode": "fixed"
                }
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "INFO"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "green",
                  "mode": "fixed"
                }
              }
            ]
          }
        ]
      },
      "gridPos": {
        "h": 8,
        "w": 12,
        "x": 0,
        "y": 0
      },
      "id": 2,
      "options": {
        "barRadius": 0,
        "barWidth": 0.24,
        "colorByField": "Time",
        "fullHighlight": false,
        "groupWidth": 0.7,
        "legend": {
          "calcs": [
            "count"
          ],
          "displayMode": "list",
          "placement": "bottom",
          "showLegend": true
        },
        "orientation": "vertical",
        "showValue": "always",
        "stacking": "normal",
        "tooltip": {
          "hideZeros": false,
          "mode": "multi",
          "sort": "none"
        },
        "xField": "Time",
        "xTickLabelRotation": 0,
        "xTickLabelSpacing": 200
      },
      "pluginVersion": "12.0.1",
      "targets": [
        {
          "direction": "backward",
          "editorMode": "code",
          "expr": "sum by (level) (count_over_time({namespace=\"default\"} | json | line_format \"{{.log}}\" | json | message !~ \"^$\" or stacktrace !~ \"^$\" [5m]))",
          "legendFormat": "{{level}}",
          "queryType": "range",
          "refId": "Query error",
          "step": ""
        }
      ],
      "title": "Level counts",
      "type": "barchart"
    },
    {
      "datasource": {
        "type": "loki",
        "uid": "P8E80F9AEF21F6940"
      },
      "fieldConfig": {
        "defaults": {
          "custom": {
            "align": "auto",
            "cellOptions": {
              "type": "auto"
            },
            "inspect": false
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green"
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          }
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "Time"
            },
            "properties": [
              {
                "id": "custom.width",
                "value": 175
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "container"
            },
            "properties": [
              {
                "id": "custom.width",
                "value": 226
              }
            ]
          }
        ]
      },
      "gridPos": {
        "h": 8,
        "w": 24,
        "x": 0,
        "y": 8
      },
      "id": 1,
      "options": {
        "cellHeight": "sm",
        "footer": {
          "countRows": false,
          "fields": "",
          "reducer": [
            "sum"
          ],
          "show": false
        },
        "showHeader": true,
        "sortBy": []
      },
      "pluginVersion": "12.0.1",
      "targets": [
        {
          "datasource": {
            "type": "loki",
            "uid": "P8E80F9AEF21F6940"
          },
          "direction": "backward",
          "editorMode": "code",
          "expr": "{namespace=\"default\"} | json | line_format \"{{.log}}\" | json | line_format \"[{{.container}}] {{.message}}\\n{{.stack_trace}}\"",
          "queryType": "range",
          "refId": "A"
        }
      ],
      "title": "New Panel",
      "transformations": [
        {
          "id": "extractFields",
          "options": {
            "source": "labels"
          }
        },
        {
          "id": "organize",
          "options": {
            "includeByName": {
              "Time": true,
              "container": true,
              "message": true
            },
            "indexByName": {
              "Time": 0,
              "container": 1,
              "message": 2
            }
          }
        }
      ],
      "type": "table"
    }
  ],
  "preload": false,
  "schemaVersion": 41,
  "tags": [],
  "templating": {
    "list": []
  },
  "time": {
    "from": "now-1h",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "browser",
  "title": "Loki 3",
  "uid": "5722542b-797b-4dbd-89e5-9f72853cbdfb",
  "version": 3
}