Expose all options supported by grafana

[reubano]

What you expected to happen?

I should be able to set any grafana supported option.

What happened?

When setting an option, e.g., colorMode for a BarGauge, I get the error,

TypeError: __init__() got an unexpected keyword argument 'colorMode'

I'm sure there are other supported options currently not exposed as well.

Grafana json

{
  "id": 3,
  "gridPos": {
    "x": 16,
    "y": 0,
    "w": 8,
    "h": 7
  },
  "type": "bargauge",
  "title": "Daily Average By Pod",
  "transformations": [],
  "pluginVersion": "8.4.0-pre",
  "maxDataPoints": 100,
  "interval": "30s",
  "links": [],
  "cacheTimeout": null,
  "description": null,
  "editable": true,
  "error": false,
  "height": null,
  "hideTimeOverride": false,
  "maxPerRow": null,
  "options": {
    "reduceOptions": {
      "values": false,
      "calcs": [
        "lastNotNull"
      ],
      "fields": "",
      "limit": null
    },
    "orientation": "horizontal",
    "displayMode": "gradient",
    "showUnfilled": true,
    "showThresholdLabels": false,
    "showThresholdMarkers": true
  },
  "repeat": null,
  "repeatDirection": null,
  "targets": [
    {
      "datasource": null,
      "expr": "avg_over_time(sum by (database) (metric1)[5m:5m])",
      "format": "time_series",
      "hide": false,
      "instant": false,
      "interval": "",
      "intervalFactor": 2,
      "legendFormat": "{{instance}}/{{app}}/{{database}}",
      "metric": "",
      "refId": "A",
      "step": 10,
      "target": ""
    }
  ],
  "timeFrom": null,
  "timeShift": null,
  "fieldConfig": {
    "defaults": {
      "thresholds": {
        "mode": "absolute",
        "steps": [
          {
            "color": "purple",
            "index": 0,
            "line": true,
            "op": "gt",
            "value": null,
            "yaxis": "left"
          }
        ]
      },
      "mappings": [],
      "decimals": null,
      "links": [],
      "max": null,
      "min": 0,
      "unit": "none",
      "color": {
        "mode": "continuous-BlPu"
      }
    },
    "overrides": []
  },
  "datasource": null
}

re: #439

[reubano]

I think a good start to implementing this would be creating JSONSchema for each graph. Grafana has one for the dashboard, but I don't see anything for the graphs.

[sivukhin]

There is an OpenApi spec in the grafonnet repository: https://github.com/grafana/dashboard-spec/tree/master/specs/7.0 Maybe grafanalib can use some automatic/semi-automatic approach to generate basic Python object representation from OpenApi spec...