Change ConfigMap's data field to weakly-typed JSON

[ari-becker]

Currently ConfigMap's data field's type is List { mapKey : Text , mapValue : Text }. This prevents ConfigMap from hosting nested object structures, which the domain permits.

Can we change the type to the new weakly-typed JSON.object?

[arianvp]

Yes please! that sounds like a sane thing to do.

The more general feature request is:

map anything that has "type":" object" but lacks a "properties"
e.g. configmap is:

    "io.k8s.api.core.v1.ConfigMap": {
      "description": "ConfigMap holds configuration data for pods to consume.",
      "properties": {
        "apiVersion": {
          "description": "APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#resources",
          "type": "string"
        },
        "binaryData": {
          "additionalProperties": {
            "format": "byte",
            "type": "string"
          },
          "description": "BinaryData contains the binary data. Each key must consist of alphanumeric characters, '-', '_' or '.'. BinaryData can contain byte sequences that are not in the UTF-8 range. The keys stored in BinaryData must not overlap with the ones in the Data field, this is enforced during validation process. Using this field will require 1.10+ apiserver and kubelet.",
          "type": "object"
        },
        "data": {
          "additionalProperties": {
            "type": "string"
          },
          "description": "Data contains the configuration data. Each key must consist of alphanumeric characters, '-', '_' or '.'. Values with non-UTF-8 byte sequences must use the BinaryData field. The keys stored in Data must not overlap with the keys in the BinaryData field, this is enforced during validation process.",
          "type": "object"
        },
        "kind": {
          "description": "Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds",
          "type": "string"
        },
        "metadata": {
          "$ref": "#/definitions/io.k8s.apimachinery.pkg.apis.meta.v1.ObjectMeta",
          "description": "Standard object's metadata. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata"
        }
      },
      "type": "object",
      "x-kubernetes-group-version-kind": [
        {
          "group": "",
          "kind": "ConfigMap",
          "version": "v1"
        }
      ]
    },

Here additionalProperties forces the keys to be of type string (https://swagger.io/docs/specification/data-models/dictionaries/)

So, the most type-safe we can do here is:

List ({ mapKey : String,  mapValue: JSON.object})